Airline fees

The fare is not hiding a fee. It's a stripped-down price.

In the US, the fare you're quoted already has to include every mandatory tax and carrier charge. Nothing after that is hidden. It's optional, and every airline strips a different amount out of its cheapest fare to get the number that low.

Bags, seats, and the right to change your mind cost extra because they were deliberately removed from the base price, not snuck in at checkout. The skill here isn't beating the system. It's knowing exactly what your fare bought, and what a restricted fare took out before you paid for it.

1. Bags: what varies, and the gate-check trap

How much a bag costs, or whether it costs anything, comes down to four things: the fare you bought, the route, the bag's own size and weight, and when you pay for it. A personal item is not a carry-on. Airlines size the two differently, and treating them as the same thing is the single most common way people get caught out at the gate. Paying for a bag online, before you fly, is almost always cheaper than paying at the counter or the gate itself.

None of the actual dollar figures belong on this page. They change by carrier, by route, and by season, so check your airline's own fee page before you fly rather than trusting a number written down anywhere else, including here.

Source: the Senate report and Sen. Blumenthal's letter.

2. Seats: choosing one is not the same as being assigned one

A seat fee buys you the choice of where you sit. It doesn't buy the seat itself. Skip the fee and you're still assigned a seat, free, at check-in; it's just as likely to be a middle seat, and it isn't guaranteed to be next to anyone you're traveling with.

Airlines generally try to seat a young child next to an accompanying adult, but that's a practice, not a guaranteed right, and it isn't universal. If keeping your group together matters more than the seat itself, buying no seat selection at all and calling the airline directly is often more reliable than gambling on the assignment algorithm.

Seat fees, upgrade tiers, and family-seating specifics are all carrier-specific and change often. Check your airline's current seat map and policy before you decide.

3. Basic economy: know what got removed

Basic economy is not one product. Every carrier strips a different set of things out of it, so basic economy on one airline can be close to a normal fare with just no seat choice, while on another it means no overhead bin space, no changes, and last boarding. The question is never whether basic economy is worth it in general. It's what THIS airline's basic fare removed, and whether you needed any of it.

Source: Southwest's own page.

4. Change and cancel: four separate things, not one

"No change fee" gets read as "free to change your mind," and that's where people lose money. There are four separate things bundled into any change, and knowing which ones your fare actually waives is the whole skill:

• Permission to change at all. Basic and other restricted fares often don't allow it, no matter what you're willing to pay.
• The change penalty. Most airlines dropped this on their main economy fares; it's usually still charged on basic and other restricted tiers.
• The fare difference. Waived change fee or not, if the new flight costs more, you pay that difference. Every time.
• What happens to the rest of the money. Often a credit for future travel, not cash back, and that credit can carry its own expiry and its own restrictions.

A fare with "no change fee" can still cost you the entire ticket price in fare difference, and hand back a credit instead of cash for whatever's left. That's not a trick. It's four separate policies that only feel like one because an airline's marketing says so.

5. What currency you pay in doesn't dodge the fee

"Always pay in the airline's home currency" gets repeated as a savings trick. It isn't one. Being charged in US dollars instead of local currency does not exempt a purchase from your card's foreign transaction fee: the fee attaches to a transaction with a foreign merchant, not to whatever currency is printed on the receipt, and the Consumer Financial Protection Bureau's own rule defines it exactly that way.

This is a correction, not a hack, and there's no clean percentage to publish here: the actual cost depends entirely on your own card's terms. What does help, at a card terminal that offers a choice in the moment: decline the machine's offer to bill you in dollars and pick the local currency instead, which avoids a separate markup the terminal itself adds. That's a different fee than the one this section corrects, and it's covered in full on cash or card, country by country.

Source: CFPB, Regulation Z.

6. Two risks that aren't about the price

Self-transfer: one search result, maybe two tickets

A single search result showing one connection doesn't always mean one ticket. Some of the cheapest itineraries you'll find are actually two separate tickets stitched together by the search site, on two airlines with no agreement between them.

Hidden-city ticketing: why it looks cheaper, and what actually happens

Skipping the last leg of a connecting itinerary because the through-fare undercuts a direct one looks like a pricing bug. It isn't one. Airlines price a route by the competition on that specific origin-destination market, not by distance, which is exactly why a longer itinerary that lays over in your actual destination can come in cheaper than a ticket straight there.

The corporate side of this made headlines too, but it isn't the traveler's risk. American won a $9.4 million copyright verdict against the search site Skiplagged in 2024 over its use of American's logo, affirmed in 2025. The jury separately found Skiplagged's use of American's trademark was fair use and awarded no damages on that claim, and both sides are appealing (Skiplagged the copyright award, American the trademark loss), with the case still active in early 2026. None of that turns on whether skiplagging itself is legal for a traveler; it doesn't rule on that question at all. What actually reaches a traveler is the contract enforcement: a cancelled ticket, a lost fare, and, in American's case, a multi-year ban, for a practice most airlines' own rules already forbid. Never a how-to: if you're weighing it, weigh the ban, not the fare gap.

Source: the verdict and the ban.