Delta Air Lines' cancellation policy depends on your ticket type, destination, and the timing of your cancellation. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) All flights booked directly with Delta can be canceled for a full refund within 24 hours of purchase, regardless of fare class. 

For cancellations made after 24 hours

Non-refundable tickets

• Main Cabin and higher (originating in the U.S., Canada, Europe, Africa, or the Caribbean): There are no cancellation or change fees, but you will receive the ticket value as an eCredit, not a refund. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)
• Basic Economy: These tickets are generally non-refundable and non-changeable.
• You can cancel before departure and receive an eCredit for the remaining value minus a cancellation fee, which is typically $99 to $199 depending on your route. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)
• If the cancellation fee exceeds the ticket's value, no eCredit will be issued.
• Other international travel: For non-refundable tickets not originating in the regions listed above, cancellation fees vary by route and fare rules. The remaining value is issued as an eCredit. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)

Refundable tickets

• You can cancel a refundable ticket before departure and receive a full refund to your original payment method. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)