All tickets are non-refundable unless the WORKS was purchased at the time of initial booking. All bookings are refundable within 24 hrs of booking for flights over 7 days from departure. Tickets must be canceled prior to the departure of the flight to keep their value.

Yes, you can technically cancel a Frontier flight after checking in, but in 2026, you will almost certainly not receive a cash refund unless you purchased the "Works" bundle or "Frontier Anyfare." For standard tickets, if you cancel after checking in, you will be issued a Travel Credit for the value of the fare, minus a cancellation fee (which can be as high as $99 if you are within 6 days of departure). If you are within 24 hours of the flight and have already checked in, many airlines' automated systems will "lock" the ticket, requiring you to speak with a chat agent or a representative at the airport to "un-check" you before the cancellation can be processed. A high-value "pro-tip" for 2026 is that if the flight is delayed by more than 3 hours, you are entitled to a full cash refund under new DOT rules, regardless of whether you checked in or not. If you just changed your mind, however, expect to lose a significant portion of your money to Frontier's "unbundled" fee structure.