Airline passengers often complain about the extra fees airlines charge for services like checked baggage, seat upgrades and priority boarding. These ancillary charges are not trivial for carriers: they generate substantial revenue. The U.S. Department of Transportation reports that U.S. airlines collected $4.6 billion in ancillary fees in the second quarter of the year, up from $3.1 billion in the first quarter. Although that total represents a decline from the second quarter of 2015, when airlines took in $5.5 billion, ancillary fees remain a significant source of income.
Baggage fees alone accounted for about $1.1 billion of that quarterly total, while reservation change fees brought in roughly $755 million. Major U.S. carriers—American Airlines, Delta Air Lines and United Airlines—along with low-cost carriers Spirit and Frontier, are among the airlines generating the most revenue from baggage charges so far this year.
Looking at a longer timeframe, the Department of Transportation has estimated that since 2008 airlines have collected more than $26.8 billion in baggage fees and over $21.5 billion in change and cancellation fees. Those figures do not capture every source of ancillary revenue: pet transportation fees, the sale of frequent-flyer miles to airline partners, and standby passenger charges are examples of other streams that contribute to airlines’ ancillary income but are tracked separately.
For travelers, ancillary fees have reshaped the cost of flying. Many carriers now unbundle services that were once included in the base fare, giving passengers the option to pay only for the amenities they value. That model can lower advertised ticket prices while increasing overall revenue per passenger as travelers decide whether to add baggage, seat selection or expedited boarding. From an industry perspective, ancillary fees provide airlines with more predictable, controllable income that can help offset fluctuations in ticket demand and fuel costs.
Regulators and consumer advocates continue to monitor the practice. Questions persist about transparency: travelers want clearer, up-front pricing so they can compare total trip costs across airlines. In response, some carriers have adjusted how fees are presented during booking, and industry observers track changes in fee policies as airlines compete for price-sensitive customers.
As airlines refine their ancillary strategies, passengers can expect the fee landscape to evolve. Awareness and comparison remain the best tools for consumers seeking to minimize extra charges, while airlines will likely continue to rely on ancillary revenue to support profitability and service differentiation.