The procedure for cancelling a FastPass+ reservation is very similar to making a change. The steps are the same except select cancel rather than modify.
Before cancelling, consider if it’s necessary, though. FastPass+ reservations do not cost money. They can be modified up until your arrival window opens. They can even be modified for only a portion of your party. It is often much easier to modify the time or experience than cancel. However if you are changing the park you are in for the day, or canceling your plan entirely, canceling a FastPass+ reservation makes sense.
Once you have your FastPass+ reservation open, select view details.
Next, when given the choice, select “cancel” to cancel the reservation.
Once you select cancel, you will be prompted to confirm that this is the action you wish to take.
Once the “Yes, Remove” button is selected, your FastPass+ reservation will be removed from your account.