Because Delta understands that travel plans can change at any time, customers can cancel their tickets at any moment. There's a chance your Delta Airlines flight will be rescheduled. Passengers who have previously made advance reservations and are unsure how to make changes can use Delta Airlines Manage Booking.As a result, they are able to make quick decisions. delta airline cancellation allows you to cancel your flight quickly and conveniently. Read also : american airlines flight cancellation | united airlines cancellation