The 24-Hour Rule: How to Cancel a Flight for Free

Book a flight to, from or within the US directly with the airline at least 7 days before departure, and you get at least 24 hours to walk away without a penalty. That is the 24-hour rule, set by the US Department of Transportation. Here is who it covers, what Delta, American, JetBlue and Southwest give back, where the rule stops, and how to use the window to rebook a cheaper fare.

What the 24-hour rule says

It binds US airlines on all their flights and foreign airlines on their flights to and from the US, provided the airline flies any aircraft with 30 or more seats. A European carrier selling a seat to New York is covered on that flight; the same carrier between two cities abroad is not.

You have to meet three conditions: buy from the airline itself, book at least 7 days before the first flight departs, and act within 24 hours of booking. The airline decides whether that means a refund or a hold, and it does not have to offer both.

24-hour cancellation at Delta, American, JetBlue and Southwest

All four offer free cancellation on tickets bought direct, but the booking window, the deadline and the exclusions differ.

Airline	What you get	Booked how far ahead	Cancel by	The catch
Delta	Full refund to your original payment, no fees	No minimum stated	Midnight of the day after purchase, or midnight of departure day if sooner	Direct bookings only; award tickets by phone
American	Refund, on every ticket type	7+ days before departure	24 hours after first purchase	Agency bookings go through the agency; group blocks excluded
JetBlue	Cancellation with no cancellation fee	7+ days before departure	24 hours after booking	The entire booking must be cancelled; JetBlue Vacations excluded
Southwest	Full refund to the form of payment	7+ days before departure	24 hours after the initial booking	Only reservations you have not changed

Delta’s Risk-Free Cancellation goes furthest: its terms set no 7-day minimum and cap the deadline at midnight of departure day, so a trip booked for next weekend still gets the window. United’s 24-hour booking policy gives a full refund with no fee on tickets bought from United at least one week before departure, provided every flight for every passenger on the reservation is cancelled.

American also offers a free 24-hour hold on select flights booked at least 7 days out. An airline that takes the hold option instead lets you keep the fare without paying for 24 hours, then buy it or let the hold lapse. Since 2 July 2026, airlines no longer have to state their choice on the last booking page, so check the airline’s cancellation page before you count on a refund.

When the 24-hour rule does not apply

The 24-hour window does not cover these four cases:

• Booked less than 7 days out. The federal rule stops at one week before departure; of the four airlines above, only Delta goes further.
• Booked through a travel site or agent. The Department of Transportation says the 24-hour requirement does not apply to online travel agencies, travel agents or other third parties.
• Changing instead of cancelling. Airlines do not have to make free changes inside 24 hours, not even a new date or a name correction, and Southwest’s refund covers only reservations you have not changed.
• Group and package bookings. American excludes group-block reservations, and JetBlue excludes JetBlue Vacations bookings.

Flights outside the US

A foreign airline follows the rule only on flights to and from the US. The EU has no equivalent: Article 3(3)(k) of Directive 2011/83/EU excludes passenger transport from the consumer cooling-off right, and regulation 27 of the UK’s Consumer Contracts Regulations 2013 leaves it out of the UK right to cancel too. On a foreign airline’s flight within Europe or Asia, any free cancellation window is the airline’s own offer.

Does the 24-hour rule cover basic economy?

Yes. The regulation makes no exception for fare type, and the airlines spell it out: American lets you cancel basic economy for a refund within 24 hours when you book at least 7 days out, and Delta’s Risk-Free Cancellation covers Main Basic.

The difference is what comes after. On a basic economy fare the first 24 hours are often the only free exit: Delta Main Basic cannot be changed or refunded once its Risk-Free Cancellation period ends. If you are unsure about the trip, decide inside that window.

How to cancel a flight within 24 hours

Cancelling takes a few minutes online. What goes wrong is usually the clock or the booking channel.

Cancel and confirm the refund

1. Find the booking time on your confirmation email and work out your deadline.
2. Check that you booked at least 7 days before the first flight, unless the airline is Delta.
3. Open the trip on the airline’s website or app, such as My Trips at Delta, and choose the cancel option.
4. Confirm the screen shows a refund, not a travel credit, and on JetBlue that it covers every flight and passenger on the booking.
5. Call the airline for award tickets: Delta handles SkyMiles award cancellations by phone.
6. Save the cancellation email and watch your card statement for the refund.

Rebook if the fare drops within 24 hours

The rule does not make the airline reprice your ticket. It does let you buy the same flights at the lower fare and cancel the first booking for nothing, which works as the free change the regulation does not require. The old booking must be cancelled before its window closes, and the new one gets its own 24 hours only if it is also made at least 7 days before departure.

Example fares for illustration, October 2026 search: one round trip from Boston to Denver, 11 to 15 March 2027, booked direct with an airline that refunds cancellations made within 24 hours.

When	What you do	Fare
Monday 8:40 pm	Book the round trip on the airline’s site	$312 charged
Tuesday 6:15 pm	Search the same flights and fare type again	$264 shown
Tuesday 6:20 pm	Book the $264 fare as a new reservation	$264 charged
Tuesday 6:30 pm	Cancel the $312 booking, with about 2 hours of its window left	$312 refunded

• Saving: $48, with no fees paid.
• New clock: the $264 booking has its own window, to 6:20 pm Wednesday, because it was also made more than 7 days before departure.
• Order: book the new fare first, so a fare that jumps back up does not leave you without a ticket.

Set a price alert on the exact flights right after you book, and check once more about an hour before your deadline.

Other ways to use the 24-hour window

The window turns a nonrefundable fare into a free one-day option.

• Lock a fare while plans firm up. Book when the price is right, then use the day to confirm dates with work or the people you travel with.
• Decide before the window closes. Once it does, a nonrefundable ticket follows its fare rules, and only refundable tickets still return cash when you change your mind.
• Catch a fare before it goes. A short sale or an airline’s pricing mistake can be pulled at any time, so booking first and checking dates afterward costs nothing while the window covers you.
• Show onward travel. Some travelers book a ticket out of their destination to show proof of onward travel at check-in, then cancel it inside the window. It works only when that ticket qualifies for the window, and the full fare sits on your card until the refund arrives.