Airline Change and Cancellation Fees
The airline change/cancellation fees listed here apply to reservations in the lowest fare class for flights within the continental U.S. They are often waived for passengers in higher fare classes, frequent flyers who have reached a certain status in an airline's loyalty program, and customers who book with an airline-affiliated credit card. The Department of Transportation requires airlines to allow all customers 24 hours to cancel a reservation without penalty (or hold it without payment, as long as they're booking at least a week in advance). Fees may vary depending on when and how (online or offline) the booking is changed or cancelled and on the cost or duration of the flight. Airline change fees are assessed on top of any difference in fare. Some airlines let passengers standby on a different flight on the same day for free, if there's space available, but charge a fee for a confirmed seat.
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*Depending on fare and time until departure