Check the seller and the departure date
Claim: Every airline ticket can be canceled for a full refund within 24 hours because federal law requires it. Verdict: false as stated. This is a review of the rule's scope, not an allegation that a particular airline refused a valid refund.
The Department of Transportation describes its requirement for airline purchases made at least seven days before scheduled departure. A last-minute booking does not receive that protection automatically. The department also expressly excludes tickets booked through online travel agencies and other third-party agents from this particular airline requirement, although an agent can voluntarily offer comparable terms.
A hold and a refund are different options
For qualifying advance bookings, airlines must offer either a 24-hour reservation hold at the quoted price without payment or a 24-hour cancellation-and-refund option. They are not required to provide both. Travelers need to check the carrier's procedure before paying rather than assume that any mention of 24 hours means the same thing.
DOT's ticket-buying guidance distinguishes a reservation from other changes. The rule does not require free alterations to travel dates or a misspelled name. Canceling and making a new reservation may also expose a traveler to a different fare. The existence of a cancellation option does not reserve the old price indefinitely.
Do not confuse changing your mind with an airline cancellation
Different refund rules apply when the airline cancels or significantly changes a flight and the passenger declines the offered travel or other compensation. DOT's refund page covers those circumstances separately. A ticket's nonrefundable label therefore does not answer every possible refund question, and the absence of a 24-hour right does not erase other protections.
Before booking, save the seller's cancellation policy, the purchase time and scheduled departure. If an agency sold the ticket, DOT advises contacting that agency first about the reservation. This three-part record—who sold it, when it was bought and what changed—helps distinguish a voluntary cancellation from an airline-caused disruption.
Sources and further reading
U.S. Department of Transportation: refunds and 24-hour exceptions ↗
U.S. Department of Transportation: buying a ticket and agency bookings ↗