The Two Companies at the Front Door of American Aviation

The short version

The question: Do Signature Aviation and Atlantic Aviation — the two dominant chains of fixed-base operators (FBOs), the private terminals that sell fuel, parking, and handling at America's airports — constitute a price-gouging duopoly that unfairly burdens Part 135 charter operators and general aviation aircraft owners?

The honest answer, after weighing every primary source we could find: the evidence strongly supports localized, structural market power with documented episodes of monopoly-level pricing — and it substantially complicates the popular "duopoly gouging" story. The U.S. government itself has treated each airport as its own FBO market in six separate antitrust actions since 1997, warning in 2016 that concentration would mean "higher prices and lower quality." A federal statistical model found exactly that price pattern where competition is absent. Fees have multiplied in number and size, and both chains are owned by private capital that paid roughly sixteen times earnings expecting those cash flows to grow. But the two chains rarely face each other on the same field, most FBO fields in America have no chain presence at all, real operating costs have soared, and — in the most dramatic documented case — it was the airport sponsor, not the FBO, that raised the cost of doing business a hundredfold. The gate is real. Who owns the gate, and who profits from it, is a more tangled question than either side admits.

Prologue: the $598 hour

The invoice fits on a single page. A Daher TBM — a fast single-engine turboprop, the kind flown by owner-pilots and small charter outfits, not billionaires — lands at Aspen/Pitkin County Airport and taxis to the only FBO on the field. When the bill arrives it reads: ramp fee, $365. Habitat fee, $25. Security fee, $150. With handling, the documented total comes to $598 — before a single gallon of fuel.^[22]

Multiply that scene across the country and you have the angriest running argument in American general aviation. According to a pilot testimonial in AOPA's file, the owner of a twin turboprop was quoted an $83 ramp fee and billed $469.92. A Piper M600 pays a $419 ramp fee at a field where the piston airplane next to it pays $45. A flight department dispatches a jet to New Orleans for Super Bowl LIX and finds a $17,300 "special event fee" waiting for a Boeing BBJ — $3,900 even for a light jet, $2,600 for a single-engine turboprop, per stop, on top of everything else.^[23]

The names on these invoices are, more often than not, one of two companies. Signature Aviation, owned since 2021 by a consortium of Blackstone, Global Infrastructure Partners (now part of BlackRock), and Bill Gates's Cascade Investment, operates more than 200 private-aviation locations across 27 countries — including multiple terminals at the crown-jewel fields of Teterboro, Van Nuys, and Palm Beach. Atlantic Aviation, assembled by Macquarie's infrastructure funds and sold to KKR for $4.475 billion in 2021, runs more than 100. As this article went to press, Apollo Global Management and Singapore's sovereign wealth fund GIC were reported to be closing in on a majority stake in Atlantic at a valuation of almost $10 billion — more than double what KKR paid five years ago.^[15]

To the pilots' lobby, the story writes itself: private equity rolled up the ramps of America, then raised the tolls. To the FBO industry, that story is a slander told by people who have never priced a gallon of Jet A, met a $12 million minimum annual guarantee, or built a $30 million terminal on land they will never own.

Both stories contain true sentences. Neither survives contact with the full record. What follows is the full record — or as close to it as public documents allow.

The gate: what an FBO actually is

Nearly every flight that doesn't begin at an airline gate begins at an FBO. The term — "fixed-base operator" — is a fossil from the barnstorming 1920s, when itinerant pilots sold rides from farm fields and the first businesses to operate from a fixed base at the new municipal airports needed a name. A century later, the FBO is the service layer of general aviation: the private terminal where passengers board, the trucks that pump Jet A and 100LL avgas, the line crew that marshals, tows, chocks, and deices, the ramp where aircraft park, and often the hangars where they sleep.

Three structural facts make this industry unlike ordinary retail, and all three matter to the gouging question.

First, FBOs sit on public land but are private businesses. Nearly every airport that matters here was built and expanded with federal money. In exchange for those grants, airport sponsors sign "grant assurances" — contractual promises to the FAA that the airport will be available for public use "on reasonable conditions and without unjust discrimination," that no one will be granted an exclusive right to operate, and that fee structures will make the airport as self-sustaining as possible.^[19] The FBO itself signs none of this. It is a tenant. The FAA polices the airport sponsor; the sponsor, in theory, polices its FBO through the lease. That double layer of indirection is where most pricing complaints go to die — a point we will return to.

Second, the customer usually cannot choose. A charter passenger picks the airport nearest the meeting, the ski house, the funeral. The operator flies where the passenger pays to go. If that field has one FBO — and per the industry's own trade association, about 75 percent of U.S. public-use airports with a 3,000-foot paved runway have exactly one — the transaction is not shopping; it is paying the toll.^[21] Even at multi-FBO fields, an operator's choice is constrained by fuel contracts, hangar space, and where the customer's car is parked.

Third, the product is mostly a cross-subsidy. The classic FBO bargain is that fuel margin pays for everything else: the free coffee, the crew cars, the lounges, the line crew standing in the rain. Buy enough fuel and the ramp fee is waived. Don't — because you're a flight school Cessna, or a turboprop that tankers cheap fuel from home — and you meet the fee schedule. Whether that fee schedule is cost recovery or rent extraction is, in one sentence, the entire debate.

The consolidation machine, 1992–2026

Neither Signature nor Atlantic grew big by building. They grew big by buying — and the buying has never really stopped.

The backdrop matters: the American FBO population has been shrinking for forty years. Trade accounts put the peak at roughly 10,000–12,000 FBOs in the early 1980s; by the mid-1990s about 5,000 remained, more than 80 percent of them independently owned; today NATA counts "nearly 3,000."^[69] Consolidation did not invent the one-FBO airport — economics did. What consolidation changed is who owns the one FBO at the fields where the money lands.

How Signature was assembled

Signature Flight Support was born in 1992 as an act of consolidation: the British industrial conglomerate BBA Group bought Butler Aviation — founded in Chicago in 1947 and for decades the largest FBO chain in the country — and merged it with Page Avjet, creating a network of roughly 32 locations under a new name.^[29] By the end of 2008 the network had grown to about 95 locations, absorbing along the way the flight-support businesses of AMR Combs (1999) and Aircraft Service International Group (2001), plus Hawker Beechcraft's seven-FBO line-service business (2008) — each of which, as we'll see, drew the attention of federal antitrust lawyers.^[30]

The transformative deal came in 2015–16. BBA Aviation paid The Carlyle Group $2.065 billion for Landmark Aviation — itself the product of a decade of private-equity roll-ups spanning Encore FBO, Garrett Aviation, Piedmont Hawthorne, and, in 2014, Ross Aviation's 20-FBO network. Landmark's 68 FBOs, bolted onto Signature's 133 wholly owned and affiliate locations, made Signature not just the largest FBO network in the world but larger than its next several competitors combined.^[31]

What happened next tells you what kind of business the buyers believed they owned. BBA spent the late 2010s shedding everything that was not an FBO: the ASIG ground-services unit went to John Menzies for $202 million in 2017; the Ontic parts business went to CVC for $1.365 billion in 2019 (with $835 million of the proceeds handed straight back to shareholders); the engine repair and overhaul group went to StandardAero for $230 million in 2021. In late 2019 the company renamed itself Signature Aviation plc — a pure-play bet on the ramp.^[32] Fourteen months later, three of the most sophisticated investors on earth — Blackstone, Global Infrastructure Partners, and Bill Gates's Cascade Investment, which already owned 19 percent — outbid each other for the whole company, settling at $5.62 a share — about $4.7 billion for the equity, an enterprise-value multiple of roughly 16.0 times its 2019 adjusted EBITDA of $348.7 million per the offer document.^[6]

Private ownership did not slow the acquisitions. TAC Air's heartland network (2022) took the footprint to 227 locations. The Vail Valley Jet Center (2021) captured the Colorado ski gateway of Eagle County. Meridian Teterboro (January 2024) removed what trade press called the last independent FBO on the most important business-aviation field in America. Dulles Jet Center (2024) and Fort Lauderdale Executive Jet Center (completed October 31, 2025, per the company's announcement) followed. And in a quieter 2018 deal that deserves more attention than it got, Signature bought EPIC Fuels for $88.1 million — making the largest FBO chain the fuel supplier to roughly 205 independently owned FBOs that compete with it.^[33]

How Atlantic was assembled

Atlantic Aviation is what happens when an infrastructure fund discovers aviation. In 2004, Macquarie — the Australian bank that pioneered treating toll roads, ports, and parking as an asset class — paid a reported $238 million for what was then a roughly ten-location FBO business and built it to 19 locations by mid-2006. Then it went shopping: Trajen Holdings' 23 FBOs ($363 million all-in) took the network from 19 to 41; Mercury Air Centers' 24 FBOs followed in 2007 ($428.7 million aggregate), along with the San Jose Jet Center ($163.4 million) and Supermarine — roughly 68 locations within three years of the first purchase. Galaxy Aviation's five Florida and Colorado FBOs followed in 2013.^[10] The thesis was standard infrastructure-investor logic — long leaseholds, steady cash flows, high barriers to entry — and Macquarie's filings described Atlantic in precisely those asset-class terms.

By 2019 the Atlantic Aviation segment was producing $972 million of revenue and $276 million of EBITDA for Macquarie Infrastructure Corporation's shareholders.^[8] In June 2021, MIC sold the whole thing to KKR for $4.475 billion in cash — about 16.2 times that EBITDA, an almost identical multiple to what the Signature consortium had just paid, two data points that tell you how the smartest money in the world values a network of airport ramps.^[9] Five months later KKR bolted on Ross Aviation's 19 FBOs, pushing Atlantic to roughly 90 locations; by September 2025 it stood at 106 and had begun expanding into the Caribbean.^[4]

In March 2026, Bloomberg reported that Apollo Global Management, together with GIC, was nearing a deal for a majority stake at a valuation of almost $10 billion, with KKR rolling equity to stay aboard. If the reported terms hold, the ramps KKR bought for $4.475 billion in 2021 will have more than doubled in value in under five years — through a pandemic recovery, yes, but also through pricing, acquisitions, and investors' willingness to keep valuing FBO networks like infrastructure — in the pilots' rendering, a toll booth with a lounge.^[15]

Recycled remedies: six antitrust cases and a merry-go-round

If you want to know whether FBO consolidation raises prices, you don't have to take a pilots' association's word for it. Take the Justice Department's. Six times between 1997 and 2016, the DOJ Antitrust Division examined an FBO merger involving Signature or Landmark and concluded, in the language of formal Clayton Act complaints, that letting the deal proceed unmodified would harm consumers — at specific, named airports.

• 1997 — Palm Beach. Signature's purchase of International Aviation at Palm Beach International cleared only after Signature agreed to sell assets and leaseholds to preserve a competitor on the field.^[34]
• 1999 — AMR Combs. Signature's acquisition of the Combs chain cleared on condition it divest flight-support businesses at Palm Springs, Hartford's Bradley International, and Denver Centennial, where the deal would otherwise have left one full-service provider.^[35]
• 2001 — Orlando. Signature's purchase of Ranger Aerospace (parent of ASIG) required divesting one of the two FBOs at Orlando International; the complaint said the merger would give Signature "the ability to raise prices and lower the quality of services."^[36]
• 2008 — Indianapolis. Signature's $128.5 million purchase of Hawker Beechcraft's FBO business would have combined "the only providers of FBO services at Indianapolis International Airport." The remedy FBO eventually went to Million Air in 2009.^[37]
• 2014 — Scottsdale. When Landmark bought Ross Aviation's 20 FBOs for $330 million, DOJ required divestiture at Scottsdale Municipal — and the department-approved buyer of that remedy asset was Signature.^[38]
• 2016 — the big one. BBA/Signature's $2.065 billion Landmark purchase drew a complaint warning that, unremedied, the deal "would have created a monopoly for FBO services at three airports and reduced the number of full-service FBO providers from three to two at three others, resulting in higher prices and lower quality of FBO services for consumers." Six FBOs — at Washington Dulles, Scottsdale, Fresno, Jacqueline Cochran (Thermal, Calif.), Westchester County, and Anchorage — were sold for $190 million to KSL Capital Partners, reviving the Ross Aviation brand.^[1]

Read those six cases together and two things stand out. The first is the market definition. In every complaint, the relevant market is flight support services at a single airport. The government's economists did not consider the FBO forty miles away a substitute, because for the customer standing on the ramp, it isn't. That framing — repeated across three administrations of both parties — is the strongest official endorsement the "each field is its own monopoly" argument has ever received.

The second is what happened to the remedies. Antitrust divestitures are supposed to seed durable competitors. In the FBO industry, they mostly seeded inventory for the next merger:

• The Combs remedy FBOs at Bradley and Denver Centennial (1999) were bought by TAC Air. In 2022, Signature bought TAC Air. The Bradley operation was passed to Atlantic; the Centennial operation joined the Signature network that had been ordered to sell its predecessor twenty-three years earlier.^[39]
• The Scottsdale FBO divested by Landmark in 2014 was bought by Signature. Two years later, Signature — now buying Landmark — was ordered to divest a Scottsdale FBO. It went to Ross Aviation.^[38]
• All six of the 2016 remedy FBOs, operated by Ross Aviation, merged into Atlantic Aviation in 2022 when KKR combined the two companies. Every asset the government carved out of the #1 chain to preserve competition now sits inside the #2 chain.^[4]
• When Signature bought TAC Air in 2022, the three overlap fields — Omaha, Raleigh-Durham, Bradley — were resolved not by preserving an independent, but by selling the second FBO on each field to Atlantic. The fix for Signature-vs-TAC competition was to replace it with Signature-vs-Atlantic coexistence.^[11]

None of this violated any decree; the consent judgments had expired or were honored to the letter. And it is worth stating plainly: divesting to a large, well-capitalized rival is often the remedy antitrust enforcers prefer, because a strong buyer keeps the facility viable. But the system's output is hard to miss. Thirty years of case-by-case, airport-by-airport remedies produced a national industry in which the two largest networks now face each other at overlap fields, absorbed the remedy assets, and never had to litigate a single merger to judgment. The 2016 consent decree — the largest FBO antitrust action in history — drew exactly one public comment during its statutory comment period.^[40]

Private litigation has occasionally filled the vacuum — NetJets sued both Signature and Landmark in 2013 to enforce fuel-discount contracts, and Florida FBO PrivateSky accused Signature of using confidential information from acquisition talks to compete against it^[71] — but no private suit we located has tested the market structure itself. Since 2016, no FBO acquisition — not TAC Air, not Meridian Teterboro, not Dulles Jet Center, not Fort Lauderdale Executive — has drawn a public DOJ challenge. Some were too small to trigger Hart-Scott-Rodino review; others, like TAC Air, arrived with pre-packaged divestitures that resolved the overlaps before any challenge was needed. The enforcement regime that generated six cases in twenty years has generated none in ten.

The money: what the filings actually show

Accusations of gouging are cheap. Audited financial statements are not. For most of the relevant period, both companies filed public accounts — Signature on the London Stock Exchange, Atlantic inside Macquarie Infrastructure Corporation's SEC reports — and those numbers are the closest thing this debate has to ground truth.

Atlantic, by the numbers

Macquarie's 10-K filings show a business whose earnings grew relentlessly and whose growth did not depend on more airplanes flying. Atlantic's segment EBITDA (excluding non-cash items) climbed from roughly $168 million in 2014 to $203.6 million in 2015, about $247 million in 2017, $264.7 million in 2018, and $276 million on $972 million of revenue in 2019 — an increase of nearly two-thirds in five years.^[8] The most telling line item sits in the FY2016 10-K: revenue rose just 0.2 percent that year, while gross margin rose 6.4 percent. Revenue was essentially flat; gross margin rose anyway. Part of that gap is mechanical — wholesale jet-fuel prices fell across 2015–16, which deflates a fuel reseller's revenue line — but however one labels the remainder — pricing discipline, mix shift, market power — it is the financial signature of a business whose realized margins do not depend on selling more.^[41]

Then came the pandemic stress test. In 2020, general aviation activity across Atlantic's network fell about 25 percent and revenue fell 31 percent, to $667 million — but EBITDA fell only to $195 million, a 29 percent decline in the worst year in general aviation's modern history, and the business remained solidly profitable.^[42] Infrastructure investors noticed. Nine months later KKR paid $4.475 billion — 16.2× the pre-COVID EBITDA — and by 2025, per Mergermarket, the company was being marketed off EBITDA "in the USD 600 million range." Do the arithmetic: roughly $276 million of EBITDA in 2019, roughly $600 million being marketed six years later, on a network that grew from 69 airports to just over 100. Locations grew about 50 percent; earnings — if the reported, unaudited marketing figure is accurate — grew about 117 percent. The difference is presumably some combination of more traffic, more hangars, more fuel — and, the fee record suggests, more price.^[43]

Signature, by the numbers

Signature's last pre-pandemic year as a public company, 2019, showed $2,263.3 million of revenue and $361.0 million of underlying operating profit ($348.7 million of adjusted EBITDA on the pre-IFRS-16 basis used in the takeover documents) — roughly a 16 percent operating margin on a business that is mostly fuel resale, where revenue swings with the price of oil but margin is made per gallon and per fee.^[7] The consortium paid ~16.0× that EBITDA. Moody's rated the buyout vehicle B1 — a leveraged structure — noting roughly $4.2 billion of new cash and rollover equity above the debt.^[44]

Private ownership removed the quarterly disclosures but not every window. In April 2023, S&P Global Ratings documented a maneuver familiar to students of private equity: Signature borrowed an incremental $400 million term loan and, together with $257 million of balance-sheet cash, paid a $650 million dividend to its owners — a debt-funded distribution less than two years after the take-private.^[45] Signature executives, for their part, point to approximately $4 billion of capital deployed since 2021 across some 80 construction projects — hangars, terminals, fuel farms — several multiples of the $100–250 million it invested annually as a public company.^[27] Both things are true at once, which is rather the theme of this industry: the owners are investing in the asset and paying themselves from its cash flows, because the cash flows support both.

What the multiples mean

Sixteen times EBITDA is not what investors pay for a competitive, commodity retail business; grocery chains and gas-station operators trade at a fraction of that. It is what investors pay for infrastructure — assets with long-duration contracts, high barriers to entry, and durable pricing power. The people with the most money at stake — Macquarie, Blackstone, GIP, Cascade, KKR, and now reportedly Apollo and GIC — have priced these companies, twice each, as infrastructure assets. That is not proof of gouging. It is proof that the market believes the moat is real, and the moat is the thing the gouging debate is actually about.

The fee stack: what operators actually pay

Twenty years ago, the FBO price list was short: fuel, hangar, tie-down. Today's invoices read like an airline's ancillary-revenue playbook run in reverse — charged not to price-sensitive tourists but to customers who, having already landed, cannot comparison-shop. The modern taxonomy, assembled from published fee schedules, AOPA's testimonial file, and trade-press reporting:

• Ramp / parking fee — for occupying pavement, usually waived with a minimum fuel purchase. Documented range: $10 for a piston single at an independent to $400+ for turboprops and jets at chain FBOs at premium fields.^[22]
• Handling / facility fee — for the use of the building and line crew, increasingly charged in addition to the ramp fee, and increasingly not waivable.
• Infrastructure fee — a per-visit charge that FBOs describe as recovering capital costs; critics call it a second ramp fee. It appeared industry-wide in the mid-2010s, coincident with the consolidation wave.
• Security fee, "habitat fee," passenger fee, after-hours callout, quick-turn fee, lav service, GPU, dish/catering handling — line items that multiply with the size of the operation and the prestige of the destination. Atlantic's Aspen "habitat fee" — $25 to help fund employee housing in a resort economy — is the industry's most argued-over $25.^[46]
• Special-event fees — surge pricing for the Super Bowl, the Masters, F1, and now, per 2025 reporting, ordinary NFL Sundays and conventions: documented at $2,600 to $17,300 per aircraft at Signature's New Orleans Lakefront facility for Super Bowl LIX, and up to $14,729 for a Las Vegas Super Bowl PPR slot.^[23]
• Deicing — $1,500–$3,000 for a light jet, $10,000–$15,000 for a heavy jet in severe conditions; a service where the on-field provider is almost always a monopolist by physics (the fluid truck must come to you).^[24]

The pattern that emerges from AOPA's 2023 testimonial file — dozens of itemized invoices submitted by pilots — is not primarily about any single outrageous number. It is about stacking: three to six line items where one used to be, quoted one way and billed another (the $83 quote that became a $469.92 charge), and applied to aircraft whose pilots never asked for, and could not decline, the services being billed.^[47] The FAA's own 2017 guidance had already taken the complaint seriously enough to remind airports that fees must be reasonable and transparent — while confirming that the agency does not regulate FBO prices directly.^[19]

The industry's rejoinder — which we examine fully in Part VIII — is that these fees replaced a cross-subsidy that had quietly collapsed: fuel margin no longer covers a line operation's true costs at every field, transient light aircraft consume ramp space and staff time while buying ten gallons of avgas, and the fee simply prices what was always being consumed. Both descriptions fit the same invoice. The question a reader should hold onto is not "is the fee real?" but "what forces, at this particular field, limit it?"

Fuel: the margin everyone argues about

Fuel is where the FBO makes its living — in Atlantic's last granular public disclosure, fuel and fuel-related services produced 75 percent of segment revenue and 63 percent of gross profit^[68] — and it is where the pricing debate gets quantitative. As of late July 2026, the national average retail price of Jet A stood at $7.62 per gallon. 100LL avgas averaged $7.45 overall — $7.47 full-service against $6.42 self-service where available, a $1.05 spread between having a line technician pump it and doing it yourself.^[25]

Industry consultants who train FBO operators put the average realized margin on Jet A at roughly $1.30 to $1.60 per gallon, with $2.00 common historically and anything under about $1.10 described as unsustainable for a full-service operation.^[26] On top of the wholesale cost, the FBO pays the airport a fuel-flowage fee — typically a nickel to a quarter per gallon — plus ground rent, insurance, payroll, and equipment. What remains is the margin that funds the lounge, the crew cars, the line crew — and, at the chains, the EBITDA that supports a sixteen-multiple valuation.

Three data points frame the "chain premium" question honestly:

• The government's model. GAO's 2019 statistical analysis of prices at more than 1,500 airports found fuel prices track local costs and demand — and that at busy airports, prices were measurably higher where there was less competition, "in particular where there was only one provider."^[20] Competition works; its absence shows up at the pump.
• The same-field spread. Where two FBOs share a field, posted Jet A prices routinely differ by a dollar or more per gallon, and operator-facing tools (ForeFlight, GlobalAir) help operators arbitrage that spread. On single-FBO fields there is nothing to arbitrage.^[48]
• The discount economy behind the counter. Posted retail is the price of walking in cold. Contract-fuel programs (Avfuel, World Kinect, Titan, Phillips 66) and negotiated volume deals can take a dollar or more off retail for those with leverage — and in 2013 NetJets went to court against both Signature and Landmark to enforce contracted high-volume discounts, a reminder that even the industry's largest buyer felt it needed litigation to hold its fuel pricing.^[49] The Corporate Aircraft Association's discount network — 300+ preferred FBOs, 13,000+ member aircraft — explicitly excludes Part 135 charter aircraft from membership, leaving charter operators to negotiate alone.^[50]

The result is a two-tier market: sophisticated, high-volume buyers pay contract prices that approximate a competitive market, while retail transients — the owner-flown TBM, the flight school, the small charter outfit without a fuel-desk staffer — pay posted prices that, at concentrated fields, the government's own model says are elevated. If you are looking for where "gouging" is most defensible as a description, it is here: not in the existence of margin, but in its distribution across customers by bargaining power rather than by cost to serve.

The Part 135 squeeze

For the certificated on-demand operators flying the roughly 11,500 aircraft on the FAA's Part 135 list, FBO charges are not an annoyance; they are a cost-of-goods line that lands on every leg.^[28] A charter operator cannot pick its destination — the customer does — and it cannot easily refuse the field's FBO, because there is usually only one, and because the passenger's car service is idling outside that particular lobby.

The arithmetic compounds quietly. A light-jet operator flying 600 legs a year through fields averaging $350 in unavoidable fees carries roughly $210,000 in annual ramp-and-handling costs before fuel differential. Add the fuel spread — paying even fifty cents a gallon over contract benchmarks on 200,000 gallons is another $100,000 — plus winter deicing events at four figures each and event-fee weekends at four to five figures per visit, and ground charges become one of the largest controllable-in-theory, uncontrollable-in-practice items in a charter P&L. Operators pass most of it through to customers as itemized surcharges; what cannot be passed through comes out of margins that, for small certificate holders, are already thin. The 30 largest operators — NetJets, Flexjet, Vista, and peers, who flew about 56 percent of all Part 91K/135 hours in 2025 — blunt the impact with negotiated fuel programs, home-base hangar deals, and in NetJets' case, its own branded FBO lounges. The long tail of one-to-five-aircraft certificates has no such leverage.^[51]

Two structural details sharpen the asymmetry. First, the discount club that exists precisely to counter FBO pricing — the Corporate Aircraft Association's preferred-FBO network — is by rule closed to any aircraft on a charter certificate; its bylaws restrict membership to Part 91 operators.^[50] Second, the demand boom that followed the pandemic — U.S. business-aviation departures rose from about 1.36 million in 2024 to 1.45 million in 2025, a record — landed on a ramp-capacity base that grows only as fast as concrete can be poured, handing whoever controls existing ramp space one of the strongest sellers' markets in the industry's modern history.^[51]

It must be said clearly: no rigorous public dataset isolates "FBO fees paid by Part 135 operators" as a series over time — the invoices are private, the contracts confidential. What exists is a consistent pattern of documented examples, operator testimony in the trade press, and the demand-side logic above. We flag the evidentiary grade honestly: the direction is unmistakable; the precise magnitude is not publicly measurable. That gap in the public record is itself a policy finding.

The other side of the ledger: the industry's case, taken seriously

If the story ended with the previous six sections, the verdict would write itself. It doesn't, because the FBO industry's defense is not spin — much of it is documented, quantifiable, and inconvenient for the gouging narrative.

1. The costs are real, and they exploded

An FBO's largest line items — airport rent, insurance, wages, fuel trucks, training, and the capital cost of terminals and hangars it must eventually surrender to the landlord — have all inflated dramatically. New FBO terminal complexes run well into eight figures — the Chicago City Council's July 2026 approval of new 20-year Midway leases for Signature and Atlantic came attached to more than $150 million in combined mandatory investment, upwards of $60 million from each chain.^[52] Leaseholds run 20–40 years, and when they end, the buildings belong to the airport. NATA's warning, when AOPA launched its 2017 campaign, was that price regulation would push marginal FBOs — most of the industry is still small and independent — out of business entirely.^[63]

2. The airports are co-authors of the fee schedule

The single most spectacular fee escalation in the modern record was not imposed by a private-equity FBO; it was imposed on one, by a county government. When Atlantic's lease at Aspen came up, Pitkin County raised annual base rent from $211,829 to $1.75 million and lifted the minimum annual guarantee of fuel-flowage payments from $120,000 to $12 million in year one, then $18 million — a hundredfold increase — before the parties settled into a 30-year lease at $3 million ground rent plus a $2 million supplemental operating fee, escalating at no less than 4 percent a year, with a projected $1.15 billion flowing to the county over the term.^[53] AOPA's protest letter, in October 2023, was aimed at the county, warning that the terms would be recovered from pilots and that the sponsor was stifling competition by leasing to a single FBO despite having land for two.^[46] Every dollar of that lease is recovered on the ramp. When a pilot at Aspen pays $598 to park, the invoice says Atlantic; a large share of the economics says Pitkin County.

Aspen is extreme but not unique. Airports across the country have learned to run FBO lease competitions as revenue auctions — minimum annual guarantees, revenue shares, mandatory capital programs — because general aviation fees are one of the few unconstrained income sources a sponsor has. The FAA's grant assurances require airports to be "as self-sustaining as possible." Sponsors, quite rationally, treat the FBO lease as the instrument of that mandate. The chains, with the deepest pockets and the lowest cost of capital, win those auctions — and then price to recover them. Concentration and fee inflation share a cause as much as they cause each other.

3. Free-rider economics and the death of the cross-subsidy

The industry's most substantive answer on light-GA fees is arithmetic: a transient piston that buys ten gallons of avgas generates perhaps $15–25 of gross margin while occupying ramp space, insurance exposure, and line-crew time at a facility staffed and equipped for jets. For decades jet-fuel margin silently subsidized that visit. As traffic mixes shifted and airport rents rose, FBOs began pricing the visit directly — the ramp fee — and waiving it for customers who buy fuel. AOPA's own long-running position implicitly concedes the principle: its campaign has focused on transparency, unbundling, and access alternatives (free public tie-downs, self-service pumps), not on a claim that services should be free.^[54]

4. The service argument

Signature's roughly $4 billion post-2021 capital program, Atlantic's terminal rebuilds from Palm Beach to Birmingham, industry-wide safety training regimes (NATA Safety 1st), $100-million-plus hangar complexes for ever-larger ultra-long-range jets — this is what sixteen-times-EBITDA money builds, and it is genuinely better infrastructure than general aviation has ever had.^[27] The customers who choose it — Fortune 500 flight departments, fractional fleets — are not captive victims; they are sophisticated, repeat buyers of ground services, and many voluntarily concentrate their business with the chains for consistency, insurance standards, and global account management.

5. Competition exists — between airports, and increasingly on them

NATA's Bill Deere argued in 2017 that FBOs "compete vigorously with each other on price, service, and quality of facilities" — and at the metro scale, that is often true.^[63] A New York-bound operator can choose Teterboro, White Plains, Farmingdale, or Morristown; a Dallas arrival picks among Love, Addison, Alliance, and Fort Worth Meacham. Meanwhile the mid-tier chains — Million Air, Modern Aviation, Sheltair, Jet Aviation, Lynx — are expanding, frequently winning leases specifically because sponsors want an alternative to the big two. Where a second FBO lands on a field, posted prices respond; that is the same GAO finding that indicts single-provider fields, read from the other direction.^[20]

The referee: what happened when pilots blew the whistle

The system was tested, formally, once. In August 2017, AOPA — backed by roughly 750 pilot fee reports — filed FAA Part 13 complaints against three airports where Signature was the sole FBO controlling all transient ramp: Asheville, Waukegan, and Key West.^[17] The results, delivered over the following year, are the clearest available X-ray of how FBO pricing oversight actually works:

• Waukegan: resolved without a ruling. The airport created a free transient tie-down option and cheaper self-service avgas; AOPA withdrew. Score one for the complaint as leverage.^[18]
• Asheville: the FAA found no violation — accepting the airport's judgment that "Signature's fees are necessary and reasonable," and adding, in a sentence that defines the entire regime, that the agency is "not in a position to second-guess" the sponsor.^[18]
• Key West: a split. The FAA found Monroe County in violation of its grant assurances on pilots' self-fueling rights — vindicating the access half of the complaint — while leaving the pricing itself untouched.^[18]

Signature's written defense in those proceedings deserves quotation, because it is the industry's legal position stated plainly: its FBOs "hold an exclusive lease for the entire transient general aviation parking ramp" and are priced at fair market rates — a position the FAA's Asheville decision effectively ratified.^[72] Just over three months after the complaints landed, the FAA issued its December 2017 "Q&As — FBO Industry Consolidation and Pricing Practices," whose most consequential sentence is its flattest: "the Federal government does not regulate the pricing of FBOs." Airports must ensure pricing is reasonable and not unjustly discriminatory; the remedies the FAA points to are structural — a second FBO, a public bypass ramp — never rate review.^[19] Congress then ordered a study; GAO delivered it in November 2019, finding formal FBO price complaints to the FAA were rare (the agency relies on airport self-compliance, training, and complaint-driven enforcement), that non-fuel fees were often not posted, and — in its statistical model — that less competition meant higher prices at busy fields.^[20] AOPA's own verdict on the GAO study, days after release: it "misses the mark," analyzing fuel deeply while skimming the parking and handling fees pilots actually complained about.^[20] No rulemaking followed. A companion GAO study in July 2021 examined airports exercising their right to be the sole fuel provider.^[65] AOPA's January 2023 request that DOT fold FBO fees into its consumer fee-transparency rulemaking likewise produced no rule.^[55] And in the 2024 FAA Reauthorization, the closest Congress has come to acting, the two-track pattern repeated: Section 750 ordered yet another GAO study — this one on FBO fee transparency — while the AOPA-backed provision that would have actually required FBO fees to be "fair and reasonable" was struck from the Senate bill under industry opposition.^[66]

What the pressure campaign did produce was transparency — slowly, and ultimately at industry scale. The coalition "Know Before You Go" guidelines launched in October 2018 with NATA and NBAA alongside AOPA — an effort that has since put roughly 40,000 individual FBO fees into public view through AOPA's airport directory.^[54] Signature posted piston fees in 2018; Atlantic embraced full online fee transparency in 2021; Signature's complete fee schedules went live in July 2022. Clark County even trimmed its Las Vegas special-event fees ahead of F1, after public pressure, in late 2023.^[56] Prices, however, remained — in AOPA's own February 2025 assessment — a continuing source of documented frustration: transparency succeeded; broad restraint did not follow.^[22]

The regulatory bottom line is stark and, on the record, undisputed: no federal agency regulates what an FBO may charge. The FAA polices airport sponsors, defers to their reasonableness judgments, and in no case we located has it found a major-chain fee schedule to violate a grant assurance. The DOJ polices mergers, one airport at a time, and has not brought an FBO case since 2016. In the gap between those two jurisdictions sits the entire pricing debate.

So — is it actually a duopoly?

"Duopoly" is a precise word, and precision is owed here, because the true market structure is stranger than the accusation.

Nationally, no. Roughly 3,000–3,300 FBOs operate in the United States, and investment bank William Blair calculated in 2020 that the three largest chains together own only about 10 percent of them.^[67] Million Air franchises 36 locations, Modern Aviation runs 19, Sheltair 16, Jet Aviation about 30 worldwide — and hundreds of independents fill the rest of the directory. A pilot flying the American interior can cross the country without ever taxiing onto chain pavement.^[21]

At the airports that matter to business aviation — substantially yes, but as adjacent monopolies rather than a contested duopoly. At the top metro and resort gateways — Teterboro, Van Nuys, Westchester, Dulles, Palm Beach, Aspen, Scottsdale, Dallas Love — one or both chains hold the ramp. Signature itself announced, on closing the Meridian purchase, that it operates at 38 of the 50 busiest U.S. airports;^[12] GIP marketed its "strong presence at the top 50 US airports."^[57] Teterboro alone — the busiest business-aviation airport in the country, with 74,832 departures in 2024 — now has no FBO outside three chains — Signature, Atlantic, and Jet Aviation.^[51] The sole-FBO resort fields read like a ski-and-summit tour: Atlantic alone at Aspen and Sun Valley; Signature alone at Eagle County (Vail) since buying the Vail Valley Jet Center.^[73] The two chains meet head-to-head on relatively few fields, and recent transactions have reduced those overlaps: the TAC Air overlap FBOs were sold to Atlantic, and Teterboro's last independent went inside Signature. Whether co-located chain FBOs compete hard on price is disputed — NATA says they do, and posted same-field fuel spreads are real — but the structural trend has run toward fewer contested fields. And where one chain sits alone, it is a local monopoly of exactly the kind whose pricing the DOJ warned about and whose fuel-price effects GAO's model documented.

At the median American airport, the problem is smaller and older than either chain: it is a one-FBO town. GAO counted roughly 2,690 U.S. airports with at least one FBO and found about 87 percent had a single provider of 100LL — 84 percent for Jet A;^[20] NATA's parallel statistic says 75 percent of public-use fields with a 3,000-foot paved runway have one FBO — usually a family business on thin margins. The economics of a 3,000-foot-runway field usually cannot support two. For most of the pilot population, the practical question was never Signature-versus-Atlantic; it is whether the only fuel pump for forty miles charges $6.40 or $8.10, and whether the airport offers a free tie-down or lets the FBO fence the entire ramp.^[20]

Three tests, then, for the loaded phrase "price-gouging duopoly":

• Concentration: established — at the specific fields where business aviation concentrates, and blessed by six DOJ market definitions that treat each airport as its own market.
• Elevated pricing where competition is absent: established — by the government's own econometrics, by the same-field spreads, and by a documented fee record that has grown in both breadth and magnitude.
• Collusion or coordinated conduct between the two firms: not established. No public document — no complaint, no decree, no investigation we could locate — alleges price coordination between Signature and Atlantic. Their duopoly, where it exists, is structural: parallel local monopolies produced by consolidation and lease scarcity, requiring no agreement to sustain high prices. Economists would call it tacit coexistence in geographically separated markets; it is entirely legal, and that legality is precisely why the fee record looks the way it does.

And hovering above the market structure is the capital structure. The same handful of infrastructure investors — BlackRock/GIP, Blackstone, Cascade, KKR, now Apollo and GIC — have concluded, with their own money, that FBO networks price like toll roads. Sixteen-times-EBITDA valuations are a bet that pricing power will persist. Every incentive of the ownership layer points toward monetizing the moat; nothing in the regulatory layer points against it. One does not need a conspiracy when the incentives are this well aligned.

Verdict

We began with a loaded question: are Signature Aviation and Atlantic Aviation a price-gouging duopoly unfairly exploiting Part 135 operators and general aviation owners? Having read the filings, the decrees, the invoices, the fee schedules, the lease documents, and both sides' best arguments, here is the most honest verdict the public record supports — rendered claim by claim, because the loaded phrase bundles four claims that deserve separate answers.

The fairest single-sentence summary we can defend: America's business-aviation ground infrastructure has consolidated into a lightly regulated network of local monopolies, owned by investors who priced them as toll roads, hosted by public airports that increasingly auction their ramps to the highest bidder — and the resulting fee escalation on Part 135 operators and GA owners is real, documented, and largely unexamined by any referee, even though the case for deliberate coordinated gouging between the two giants is not made by the public record.

If that verdict satisfies neither the pilots' lobby nor the FBO industry, it has the virtue of matching the documents. The pilots are right that the gate exists, that it is priced like a monopoly wherever it is one, and that no one with subpoena power is watching the fee schedule. The industry is right that the costs are real, that the landlord takes a growing cut, that its biggest customers keep choosing the product, and that nobody has shown an agreement. The unresolved scandal, if that word applies, is not a conspiracy between two companies. It is that a piece of essential public-airport infrastructure migrated, one lease at a time, into a pricing regime with no effective oversight at all — and that everyone involved, from county commissions to federal agencies to the world's largest asset managers, found the arrangement too profitable or too hard to change.

What could actually change it

For readers who conclude the status quo needs adjusting, the record suggests where leverage exists — and where it has already failed:

• Transparency with teeth. The voluntary regime got fee schedules online; it did not standardize them or make them comparable at booking time. A DOT or FAA requirement that all fees be published in machine-readable form — the request AOPA made in January 2023 — would cost almost nothing and let software do the comparison shopping that a captive customer cannot.^[55]
• Competitive leases as federal policy. The one force with documented power over FBO pricing is a second FBO. The FAA could weight competition in grant decisions and discourage sole-source ramp monopolies where land exists — the exact issue AOPA raised at Aspen. Sponsors who auction exclusivity for revenue are converting higher prices on the flying public into county income, with grant-assurance language that current FAA practice declines to enforce against them.^[46]
• Protect the escape valves. Key West proved the FAA will enforce access rights such as self-fueling; the other escape valves — free public tie-downs, through-the-fence alternatives — work the same way. Every such valve caps the monopoly price of the front door. Codifying them — a public transient ramp at every federally funded airport, self-service fuel rights — is the cheapest structural remedy available.^[18]
• Merger review that remembers its own history. Six consent decrees produced remedies that were reabsorbed within a decade. If the FTC/DOJ ever revisit FBO consolidation — or the reported Apollo/GIC-Atlantic transaction invites a fresh look — the record assembled here argues for structural skepticism about divestiture-to-a-rival remedies in serially consolidating industries.
• Airport-owned FBOs and new entrants. A growing number of sponsors run their own FBOs or recruit challengers explicitly to discipline pricing — Orange County, California, did it bluntly in 2020, voting to replace Signature with ACI Jet and awarding its second John Wayne Airport leasehold to Clay Lacy.^[70] Nothing in federal law prevents it; the proprietary-exclusive right lets an airport be its own sole FBO — a public option, in effect, that several communities have chosen.

None of these require deciding that anyone is a villain. They require deciding that the front door of the public airport system is infrastructure, and pricing it accordingly — which, as it happens, is exactly how its owners already describe it to their investors.

Frequently asked questions

Methodology & verification

Scope. This report examines the U.S. FBO market with a focus on Signature Aviation and Atlantic Aviation, their corporate histories, pricing practices, and the regulatory record, through July 23, 2026.

Sourcing hierarchy. We prioritized primary documents: DOJ complaints, consent decrees and press releases; Federal Register competitive-impact statements; SEC EDGAR filings (MIC 10-K/8-K); London Stock Exchange RNS disclosures and annual reports; FAA compliance guidance and Part 13 outcomes; GAO-20-16; ratings-agency research; official company press releases; and AOPA/NATA primary advocacy documents. Trade press (AIN, Flying, AVweb, Corporate Jet Investor, Aviation Week) supplied contemporaneous corroboration. Each reference carries a 2–5 source score defined in the reference list (the scale reserves 1 for anecdotal color, which this report does not use as a factual basis).

Triple-verification protocol. Every load-bearing figure — deal values, dates, EBITDA series, fee examples, case outcomes — was (1) located in an initial research pass, (2) independently re-retrieved by separate research lanes working from different starting queries, and (3) adversarially cross-checked against at least one primary or two independent secondary sources before publication. Claims that survived only two passes are marked in the fact ledger accompanying this article; anonymous-source financial reporting (e.g., the Apollo/GIC negotiation) is labeled reported wherever it appears. Figures we could not corroborate — including a widely republished claim about KKR's exact return multiple — were excluded.

Limitations. Post-2021 financials for both companies are private; we rely on ratings-agency and loan-market disclosures, clearly labeled. No public dataset isolates Part 135 operators' aggregate FBO spend; that magnitude is presented as bounded illustration, not measurement. Fee examples are documented instances, not statistical averages; fee schedules change. Nothing here is investment, legal, or operational advice, and readers planning flights should verify current prices directly — posted fees can and do change faster than any publication.

Comment. This is a documents-based analysis: it is built entirely on the public record, and the companies and organizations named were not contacted for comment prior to publication. Each is invited to respond; substantive responses from named parties will be appended to this report as received (research@aerolink.one).

Independence. AeroLink Aviation LLC has no commercial relationship with any FBO chain, trade association, airport sponsor, or investment firm named in this report. This analysis was researched and produced with AI-assisted tooling under human editorial direction; every citation resolves to a human-checkable public source.

Glossary

• FBO (fixed-base operator): an airport-licensed provider of general-aviation ground services — fuel, ramp parking, hangars, terminals, line service.
• Part 135: the FAA certification under which on-demand charter and commuter operators fly; ~11,500 aircraft in the U.S.
• Part 91 / 91K: non-commercial general aviation operations / fractional-ownership program operations.
• Ramp (apron): aircraft parking pavement. A ramp fee charges for occupying it; commonly waived with minimum fuel purchase.
• Handling / facility / infrastructure fee: per-visit charges for use of FBO staff, buildings, and capital; increasingly billed alongside ramp fees.
• Fuel-flowage fee: a per-gallon payment from FBO to airport sponsor, typically $0.05–$0.25/gal.
• Minimum annual guarantee (MAG): a lease's guaranteed floor payment to the airport regardless of volume.
• Grant assurances: federally binding conditions accepted by airports taking FAA Airport Improvement Program money — including economic non-discrimination (No. 22), no exclusive rights (No. 23), and airport self-sustainability (No. 24).
• Part 13 / Part 16: the FAA's informal and formal airport-compliance complaint processes.
• Contract fuel: negotiated fuel purchasing through programs (Avfuel, World Kinect, Titan, Phillips 66) at below-retail prices.
• Jet A / 100LL: turbine fuel / leaded piston avgas.
• EBITDA: earnings before interest, taxes, depreciation, and amortization — the cash-flow proxy on which FBO networks are valued.
• EV/EBITDA multiple: enterprise value divided by EBITDA; ~16× characterized both 2021 FBO take-privates.
• Consent decree: a court-approved settlement resolving a DOJ antitrust complaint, typically via divestitures.
• HSR review: Hart-Scott-Rodino premerger notification — the process by which larger deals are screened by FTC/DOJ.