Delta Airlines provides a 24-hour cancellation policy 【1↣833↣522↣9940】. If you book a flight at least seven days before departure and cancel within 24 hours of booking (OTA)【+1-833-444-7613】 (𝙾𝚃𝙰)】), you are eligible for a full refund without any cancellation fees.
https://www.devex.com/people/what-is-the-cancellation-policy-for-delta-airlines-2264216
https://www.devex.com/people/what-is-the-cancellation-for-delta-2264073
https://www.devex.com/people/help-da-does-delta-have-a-cancellation-policy-2263784
