United Airlines just raised its checked-bag fee by $5. That’s it. Five dollars. And yet that modest increase — from $35 to $40 for the first checked bag on domestic flights — reveals more about the economics of American air travel in 2025 than any earnings call or investor presentation could.
The fee hike, which takes effect for tickets purchased starting May 20, applies to passengers who don’t hold the airline’s co-branded credit card or elite frequent-flyer status. United confirmed the change quietly, almost casually, in an update first reported by Business Insider. Second checked bags will cost $45 on domestic routes, up from $40. International bag fees will also tick upward, though the specifics vary by route.
The timing is no accident.
United’s move comes just days after JetBlue Airways announced its own fee increases, pushing first checked-bag prices to $40 on its Blue Basic fare and $45 on its core Blue fare for flights booked after June 4. JetBlue had already raised fees earlier this year. The pattern is unmistakable: airlines are treating ancillary revenue not as a supplement to ticket prices but as a structural pillar of their business models, one they’re willing to adjust with increasing frequency and decreasing fanfare.
For years, the checked-bag fee existed as a kind of psychological boundary. Airlines understood that passengers would tolerate a certain amount, but that pushing too far risked backlash — or worse, a shift toward competitors who still offered free bags. Southwest Airlines, the last major U.S. carrier to include two free checked bags, has long used that policy as a competitive weapon. But even Southwest has been under pressure from investors to reconsider, and the company’s ongoing transformation under activist investor Elliott Management has put every legacy perk on the table.
So what changed? Fuel prices, for one. Jet fuel costs have been volatile, and airlines are looking to shore up margins heading into the summer travel season. But the deeper answer is that consumers have simply absorbed these fees into their mental model of what flying costs. The outrage cycle has shortened. A $5 increase barely registers on social media anymore. Airlines know this.
United’s ancillary revenue machine is already formidable. The airline generated over $7 billion in “other revenue” in 2024, a category that includes bag fees, seat upgrades, and revenue from its MileagePlus loyalty program — which is itself tied to the JPMorgan Chase co-branded credit card that exempts holders from bag fees entirely. The incentive structure is elegant in its circularity: pay the fee, or sign up for the card. Either way, United wins.
And United isn’t alone in this calculus. American Airlines and Delta Air Lines both charge $35 for a first checked bag domestically as of early 2025, though industry watchers expect matching increases within weeks or months. The airline industry has a long history of what economists politely call “price signaling” — one carrier moves, the rest follow, and within a quarter the new price becomes the standard. No coordination necessary. Just gravity.
JetBlue’s increases are particularly telling because the carrier has been in a difficult financial position since the federal government blocked its proposed acquisition of Spirit Airlines in 2024. Without that merger, JetBlue has been forced to find growth and margin improvement organically. Raising bag fees is the lowest-friction lever available. According to Business Insider, JetBlue explicitly cited rising fuel costs as a factor in its decision.
The broader context matters here. The U.S. Department of Transportation under the Biden administration finalized rules in 2024 requiring airlines to disclose all fees upfront during the booking process. The intent was to reduce surprise charges and make comparison shopping easier. But a counterintuitive effect has emerged: when fees are displayed transparently alongside base fares, they become normalized. Passengers see the $40 bag fee at the point of purchase, factor it into their decision, and move on. Transparency, it turns out, can also function as desensitization.
The Trump administration, now in its early months, has signaled a lighter regulatory touch on airline consumer protections. Transportation Secretary Sean Duffy has indicated a willingness to revisit some of the Biden-era disclosure mandates, though no formal rollbacks have been announced. Airlines are watching closely. A relaxation of fee transparency rules could give carriers even more flexibility in how and when they present ancillary charges — though consumer advocacy groups have already signaled they’d fight any such changes aggressively.
There’s a class dimension to all of this that rarely gets discussed in airline earnings calls but is impossible to ignore. Checked-bag fees disproportionately affect leisure travelers, families, and passengers who can’t or won’t sign up for premium credit cards. Business travelers on corporate accounts, elite frequent flyers, and credit card holders are largely insulated. The fee structure effectively creates a two-tier system: those who pay list price for everything, and those who’ve bought their way into exemptions through loyalty or spending.
United CEO Scott Kirby has been candid about this dynamic, even if he wouldn’t frame it in those terms. In recent earnings calls, Kirby has emphasized United’s strategy of segmenting the cabin into increasingly differentiated products — Basic Economy, standard Economy, Economy Plus, Premium Plus, Polaris business class — each with its own fee structure and included amenities. The checked-bag fee is just one node in a complex pricing architecture designed to extract maximum revenue from every seat.
The numbers support the strategy. United reported record revenue of $57.3 billion in 2024. Ancillary fees are growing faster than base fares. And the airline’s co-branded credit card program, which generates billions in annual revenue from JPMorgan Chase, depends on a simple value proposition: the card is worth it because the fees are high enough to justify the annual fee. Raise the bag fee, and the card becomes more attractive. It’s a flywheel.
Not everyone is sanguine. Consumer groups like the U.S. Public Interest Research Group have argued that the steady creep of ancillary fees amounts to hidden fare increases — that a $200 ticket with $80 in add-on fees is really a $280 ticket dressed up to look cheap. Airlines counter that unbundling allows price-sensitive travelers to pay only for what they use. Both arguments have merit. Neither is going away.
What’s clear is that the $5 increase isn’t really about $5. It’s a signal — to investors, to competitors, to consumers — that airlines have entered a phase where fee optimization is continuous rather than episodic. The days of dramatic, headline-grabbing fee introductions (remember when bag fees first appeared in 2008?) are over. Now it’s incremental. A dollar here, five dollars there. Steady, quiet, relentless.
For passengers booking summer travel, the practical implications are straightforward. If you’re flying United domestically and checking a bag, you’ll pay $40 each way starting with tickets purchased May 20. Round trip, that’s $80 for one bag — enough to make a carry-on-only strategy look increasingly rational for short trips. And that, of course, is part of the point. Airlines would prefer you didn’t check a bag at all. It slows down turnaround times, increases fuel burn from added weight, and creates operational complexity. The fee isn’t just revenue. It’s a behavioral nudge.
JetBlue’s parallel increase only reinforces the trend. With both a legacy carrier and a mid-tier competitor moving in lockstep, the competitive pressure on holdouts — particularly Southwest — intensifies. Southwest reported disappointing first-quarter results in April 2025, and the free-bags policy, while beloved by customers, is an increasingly expensive brand promise to maintain when every competitor is monetizing the same service.
The airline industry in 2025 is profitable, consolidated, and disciplined in a way it hasn’t been in decades. Four carriers — American, Delta, United, and Southwest — control roughly 80% of domestic capacity. That concentration gives each airline significant pricing power, and bag fees are one of the simplest expressions of that power. There’s no regulatory cap on ancillary fees. There’s no competitive race to zero. There’s just a slow, steady march upward, punctuated by the occasional $5 increment that barely makes the news.
Which is exactly how the airlines want it.
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