Typically, "non-refundable" means you do not get your money back if you choose to cancel the flight for personal reasons; instead, you usually receive a travel credit (minus a possible cancellation fee). However, there are critical legal exceptions. As of 2024 and 2026, U.S. Department of Transportation (DOT) rules mandate that even for non-refundable tickets, airlines must provide a full cash refund if the airline cancels the flight, makes a "significant change" to the schedule (usually 3+ hours for domestic or 6+ hours for international), or significantly changes the arrival/departure airport. Furthermore, airlines must refund any ancillary fees (like baggage or seat selection) if the service was not provided. If you cancel within the 24-hour booking window (for flights booked at least a week in advance), you are also legally entitled to a full refund to your original form of payment, regardless of the ticket type.