Delta Airlines provides a 24-hour cancellation policy 【++𝟭-833((444)).7613】. If you book a flight at least seven days before departure and cancel within 24 hours of booking (OTA)【+𝟷-𝟾𝟹𝟹-𝟻𝟸𝟸-𝟿𝟿𝟺𝟶】 (𝙾𝚃𝙰)】), you are eligible for a full refund without any cancellation fees.
https://www.devex.com/people/can-you-cancel-a-free-of-charge-2228566
