Airline ancillary revenue: definition, trends, and market statistics

What is airline ancillary revenue?

Ancillary revenue is the money a company earns from goods and services beyond its core ticket sales. In aviation, this covers à la carte add-ons, frequent flyer programs, third-party sales, and advertising. Passengers run into these charges all the time: baggage fees, paid seat selection, onboard food. On top of that, carriers earn commissions from car rentals, hotel bookings, and co-branded credit card deals.

In 2024, ancillary revenue across the industry reached roughly $150 billion, all from non-ticket sources. The numbers at the top are striking. Delta Air Lines brought in $10.2 billion, American Airlines $9.2 billion, and United Airlines led the pack with $10.6 billion. IdeaWorksCompany expects the global total to hit $157 billion in 2025.

How airline ancillary revenue grew

Global non-ticket revenue climbed from $42.6 billion in 2013 to over $102 billion by 2022, and the pace hasn’t slowed. In 2024 alone, the industry added $32 billion more.

Idea Works attributes this to two main factors: steady passenger growth and the widespread adoption of basic economy fares. When airlines unbundle standard ticket features, travelers end up paying separately for things like seat assignments and checked bags. Base fares stay low enough to look competitive in search results, while the extras add up quickly.

How much revenue do airlines make?

Global airlines generated $718 billion in total revenues during recent reporting periods, but net profit came to just $35.3 billion. Without the roughly $150 billion contributed by ancillary sales in 2024, the industry would almost certainly be running at a loss.

The contrast with earlier years is stark. In 2008, American Airlines reported $278 million from baggage fees alone. By 2024, it was pulling in $9.2 billion across all ancillary channels.

Main airline ancillary revenue streams

For most legacy carriers, frequent flyer program partnerships (especially co-branded credit cards) are the single biggest source of ancillary income. That said, traditional fees still contribute a lot. Ancillary revenue as a share of total revenue sits at 5.2% for Qatar Airways, 8.5% for Lufthansa Group, and 8.7% for Air France-KLM.

Baggage fees

Checked luggage is a cornerstone of the unbundled fare model. Baggage fees account for more than a third of all global ancillary income. The practice started gaining real traction around 2008 and has since become standard across the industry. Airlines adjust these fees based on route length, demand, and season.

Seat selection revenue

Charging for specific seats has become just as important as baggage fees, and for some carriers it’s already overtaken them. In 2023, United Airlines collected $1.3 billion from seat assignments, edging out its $1.2 billion in baggage revenue. Together, these two categories account for more than half of all standard ancillary purchases.

Changes and cancellations

US carriers generated $2.8 billion from change and cancellation fees in 2019. After the pandemic, the approach shifted somewhat. Rather than charging penalties after the fact, airlines now sell flexible ticket classes upfront that allow future modifications without extra fees.

How airlines monetize loyalty programs

Legacy carriers rely heavily on financial partnerships to drive loyalty program revenue. Selling miles to banks for use in co-branded credit card reward programs is the largest single ancillary income source for major traditional airlines. Every time a cardholder swipes, the airline earns directly from the bank.

Airlines also use multiple booking classes and tiered loyalty status to capture different traveler behaviors. Frequent flyer programs push customers to book higher fare classes or buy additional services just to hold onto elite status. The result is a self-reinforcing revenue stream built on brand loyalty rather than transportation alone.

How digital retailing changes ancillaries

Modern technology lets carriers serve highly personalized offers during the booking process. Airline digital retailing uses artificial intelligence to predict what a specific passenger is likely to buy, and travelers increasingly expect to customize their journey from the start.

Frameworks like ONE Order are reshaping the industry’s structure. Moving away from legacy ticketing systems toward retail-focused digital platforms lets airlines sell non-flight products more effectively, turning passenger service systems into e-commerce environments with dynamic pricing and targeted offers.

Third-party ancillary revenue models

Selling products from outside vendors adds a profitable layer to the aviation business model. Carriers earn commissions by acting as digital storefronts for travel partners, with passengers booking rental cars, hotels, and travel insurance directly through airline websites. Research on third-party sales typically looks at two angles: how willing passengers are to pay for convenience, and how commission structures work from the industry’s side.

Are subscription models the next step?

Low-cost carriers originally built their model around direct distribution and à la carte charges. Now, some carriers are exploring recurring payment structures to lock in more predictable cash flow. Subscription models let passengers pay a monthly or annual fee for benefits like unlimited flights on certain routes, included baggage, or guaranteed seat selection. Digital retail infrastructure makes it easier to manage the billing and deliver a coherent experience to subscribers.

Risks of airline ancillary revenue

Even with forecasts pointing to $157 billion in 2025, heavy reliance on secondary fees isn’t without risk. Constant add-on charges can wear passengers down and damage a brand’s reputation. If travelers feel misled by hidden costs or aggressive upsells, some will switch to carriers with more transparent pricing.

Regulatory pressure is another real concern. Governments have been scrutinizing mandatory “junk fees” and pushing for clearer upfront pricing in search results. Airlines are responding partly by using AI to make personalized offers feel more relevant and less intrusive, though how well that works in practice remains to be seen.