The policy at the Walt Disney World Resort is that you can change or cancel your FastPass+ reservations for attractions on the My Disney Experience app, or at a FastPass kiosk. It is important to know that you’ll only be able to change the time of your FastPass if there are other times still available.
Disneyland Resort FASTPASS selection times cannot be changed, as those are printed on a hard ticket. The Disneyland MaxPass system allows you to book FASTPASS reservations on the Disneyland app, but is an additional charge, can only be used inside the parks, and traditional FASTPASS rules still apply.
For more details, tips, and planning information visit our Walt Disney World FastPass+ page or our Disneyland FASTPASS and MaxPass page.