The fee for a same-day flight change varies depending on the passenger's fare class and destination, with prices ranging from $75 to $150 per ticket. However, Diamond, Platinum, and Gold Medallion members are exempt from the fee. It is important to note that same-day flight changes are not guaranteed and are subject to availability. Delta Same Day Flight Change Airlines offers same-day flight changes for a fee, subject to availability and certain restrictions. Passengers can make same-day flight changes by visiting the "My Trips" section on Delta's website or app, or by speaking with a Delta representative at the airport.