What is Delta Airlines cancellation policy? How to cancel flight within 24 hours and get a full refund on your flight tickets. Call +1-800-548-3192 on for more details about Delta Airlines cancellation fees. Delta airlines provide a very smooth process to cancel your flight tickets anytime whenever passengers want to cancel it under the Delta Airlines Cancellation Policy. Book your flight tickets with the Delta Airlines Reservation without and further problems of getting difficulties during the cancellation process.