Delta ๐ธ๐๐ฃlines provides a 24-hour cancellation policy.+๐-๐๐๐-๐๐๐-๐๐๐๐ If you book a ๐๐ight at least seven days before departure and cancel within 24 hours of booking (ใ+๐-๐๐๐-๐๐๐-๐๐๐๐ USA or +๐-๐๐๐-๐๐๐-๐๐๐๐ ใ), you are eligible for a full refund without any cancellation fees.
https://crm.ridemetro.org/forums/general-discussion/7541af3d-f5c0-ef11-b542-001dd80082b2