Is it better to cancel or change a flight?

If you purchased a round-trip flight and need to change the first leg to a different day, your best bet will likely be to pay the change fee and book a new flight. If you only need to change the return portion of a round trip, however, it may be cheaper to book a new one-way flight than to pay the cancellation fee. 24-Jan-2023

https://www.valuepenguin.com/travel/how-much-does-it-cost-to-change-cancel-flight#:~:text=If%20you%20purchased%20a%20round,to%20pay%20the%20cancellation%20fee.