https://www.transfermarkt.com/-modify-cancel-delta-airlines-cancellation-policy-24-hour-help/thread/forum/696/thread_id/37582/page/1#anchor_37803
(Modify/Cancel) Delta Airlines Cancellation Policy? 24-hour/Help
Yes, Delta Airlines has a cancellation policy that varies based on the ticket type. If you booked a refundable ticket, you can cancel and receive a full refund {++1-844-(448)-0875}.