Delta recognizes that travel arrangements will change, so it allows customers to cancel their tickets at any time. It's very simple to cancel your Delta Airlines flight. Additionally, passengers who have already made advance reservations and are concerned about how to make changes to their reservations can use the Delta Airlines Manage Booking option, which allows them to make changes quickly. You can cancel your flights quickly and easily with delta cancellation policy. 24 hour time limit Following the purchase of a plane fare, passengers often cancel their flights.