FastPass+ allows you to reserve access to many things in advance such as Attractions, Entertainment and even Character Greetings. There is no additional cost to use FastPass+ service―it is included with your theme park admission.
You can start to make reservations 60 days in advance if staying at a Disney Resort for the entire length of your stay so you don’t have to go online everyday just once and your done.
If you are not staying at a Disney Resort than you can start 30 days in advance.
Either way this is a must to make your vacation a little less stressed not matter when you time of the year you go. In the past many people had contacted me saying we are going in a very low season. My response has always been the same low season usually mean shorter hours of operation which still might mean lines though not as long as peak season, but either way it makes for less stress.
Once you’ve registered online and linked your park admission, you can select from a list of experiences and times for your designated party.
Another option would be to do it at the park, check in at FastPass+ entrances during the indicated time, with little or no wait. FastPass+ selections may also be made same-day at a FastPass+ kiosk in a theme park or by using the My Disney Experience App but be prepared there is a very good chance times and availability my be limited or not available at all.
For a single theme park per day, you can make up to 3 FastPass+ selections in advance either online or using the mobile app and you may change or cancel your selections any time. You can also get assistance from the Lobby Concierge at your Walt Disney World Resort hotel or at a FastPass+ kiosk in any of the parks.