Delta cancellation policy requires you to cancel your trip at least 24 hours before your departure time if you are flying to one of their hub cities, or 48 hours before if you are flying from one of their hub cities. Delta cancellation policy allows you to cancel your flight up to 24 hours before departure. You will have to pay a $100 fee for domestic flights and $200 for international flights. If you cancel within 24 hours of departure, the fee will be $200 for domestic flights and $400 for international flights.
As per Delta Change Policy If you need to change your flight within 24 hours of departure because of an emergency situation (such as a death in the family), Delta Airlines will waive the fee and change your flight for free. Changes including, Delta Name Change, Change Flight Date Delta, Delta Rebooking, Delta Missed Flight etc...
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