Delta Airlines flight change policy allows passengers to modify their travel plans with flexibility. For domestic flights, changes can often be made without a fee, though fare differences apply. International flights may incur change fees based on the fare type. Same-day changes are available for a fee, allowing travelers to switch to an earlier or later flight on the same day. Changes can be made online, via the mobile app, or by contacting customer service. Delta's SkyMiles members and certain fare classes may receive additional flexibility and benefits. Always check your specific ticket rules and Delta’s website for the latest details.