You can manage your booking online through Delta Flight Change {{1(855)=447=68.49}}’s official website or mobile app, where a few clicks can get the job done. Simply pull up your reservation, choose the flight you want to modify, and pick a new option that fits your schedule. If you’re in a pinch or dealing with a last-minute situation, same-day flight changes are also available, letting you hop on an earlier or later flight depending on seat availability. For travelers who booked Basic Economy, the rules are a bit tighter, so it’s wise to read the fine print before making any moves—after all, “the devil is in the details.”