Delta Airlines Cancellation Fees vary depending on the fare type and the time of cancellation. If a traveller cancels their reservation for a non-refundable ticket after the risk-free cancellation period of 24 hours from booking, they will normally be charged a cancellation fee. The actual charge varies, but it normally runs from $200 to $500 for domestic trips and can be higher for overseas flights. However, if the ticket is cancelled due to a qualified medical emergency or military orders, Delta may waive the cancellation cost if proper evidence is provided.