The Washington State Ferry from Anacortes to San Juan Island is now accepting vehicle reservations! This means that you will be assured of getting on the boat you would like, provided you arrive 30 minutes prior to arrival. Attached is a link that will explain how the system works and penalty for arriving late, no-show, and changing your reservation. Please read this information carefully.
https://secureapps.wsdot.wa.gov/Ferries/Reservations/Vehicle/default.aspx
Here is some additional information that may help you:
98 miles - Travel time from Sea-Tac airport to the Anacortes ferry is approximately 2 hours or more.
82 miles - Travel time from downtown Seattle to the Anacortes ferry is approximately 1 hr. 25 minutes or more.
Travel time will vary because of construction projects, the day of the week you are traveling, the time you are traveling because of traffic, weather, or other events.
Allow additional time for being in line to go through the toll booth to present your reservation.
Owners are always ready to assist, but discreetly screened and respectful of guest's privacy.