Delta Airlines' flight modification policy allows passengers to amend their trip plans or change flights before departure. Delta Airline's flight change processes make it easier with the help of flight change policy. Delta Airlines will charge you a fee if you need to change your flight. However, if your Delta ticket meets the free flight change requirements, If you plan to change your flight, you must notify the airline 48 hours prior to your departure. Delta Airlines' ticket change policy does not allow free modifications for non-refundable tickets. https://flightcancellationpolicy.com/delta-airlines-flight-change-policy