The basic amenities offered on e-tickets for airline companies such as Delta Airlines are the 24-hour risk-free cancellation policy. This strategy requires travelers to cancel tickets purchased online via the Delta website or the Delta smartphone app, Fly Delta, within 24 hours of purchase. When a customer cancels their reservation, they will get a full refund of their fares, with no extra costs. A cancellation fee is deducted from the fare on a non-refundable ticket. If a ticket is canceled after the 24-hour Delta cancellation policy has expired, here is what happens.