Have important work to complete before you take your flight? You need not worry, though, because you can also seek a cancellation at the airport. You can change or cancel your flight at the last minute by going to the airline kiosk or by asking the Alaska Airlines executives in attendance at the airport. However, regardless of the fare class, be sure to submit your request for a flight cancellation at least 10 minutes prior to the scheduled departure of both domestic and international flights. You can easily cancel your flight online by visiting the Alaska Cancellation Policy desktop website. Online cancellation of a single ticket from a group reservation or a single-leg ticket (the return leg of a round trip) is not possible. because this is only allowed for one passenger.