Visit Delta's official website and log in to your account.
Locate your reservation by entering your booking details or accessing it through your account.
Select the flight you want to change and click on the "Modify Flight" or "Change Flight" option.
Follow the on-screen instructions to adjust your flight details, such as date, time, or destination, based on availability.
Review any fare differences and change fees. Pay the additional charges if required.
Confirm the changes, and you'll receive a new e-ticket via email.
Alternatively, you can contact Delta's customer service for assistance with changing your flight. Be aware that specific policies and fees may change over time, so check Delta's current guidelines for the latest information.