$$+1.866.579.8033 Does Delta Give You A Full Refund?

Yes, Delta gives full refunds under specific conditions: you can cancel for any reason and get a full refund if you do so within 24 hours of booking under the 24-Hour Risk-Free Cancellation policy. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) You are also entitled to a refund if Delta significantly changes or cancels your flight. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) However, many Basic Economy tickets are non-refundable and non-changeable after the 24-hour window, though you may receive an eCredit minus a fee. 

Delta's refund policy depends on the type of ticket you purchased, how and when you cancel, and whether Delta canceled or significantly changed the flight. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)

Standard cancellation policy

24-hour risk-free cancellation

For any ticket purchased directly from Delta, you can cancel within 24 hours of booking for a full refund to your original form of payment. 

Refundable tickets

Cancellation before departure: You can cancel a refundable ticket anytime before your flight's departure for a full refund. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) The refund is automatically issued to your original form of payment.
Cancellation process: You can manage the cancellation through "My Trips" on delta.com. 
Non-refundable tickets (excluding Basic Economy)

Cancellation before departure: You can cancel a non-refundable ticket before your flight departs to receive the ticket's value as an eCredit. The credit expires one year from the date of original purchase. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK)
Change fees: Change fees have been eliminated for tickets originating in the U.S. and Canada, though you must still pay any fare difference for your new flight. 
Basic Economy tickets

No changes: Basic Economy tickets are non-changeable in most cases.
Cancellation fee: You can cancel a Basic Economy ticket for a fee, and the remaining value will be issued as an eCredit toward a future flight.
Expiration: The eCredit is valid for one year from the original ticket purchase date.