After looking at Ferry times, LEAVING WEST BOUND
It will help you to schedule your flight
It takes about 1.5 hours to drive from the Seatac airport to Anacortes.
NOTE: If you do not feel like renting a car,
they have shuttle services that take you to Anacortes from the airport.
OR
They have small charter planes that you can take straight to Friday Harbor for about $85.00
You don't necessarily need to rent a car. We are getting married in the town of Friday Harbor which is where most of the shopping, dining, and lodging will be. There are taxi's on the island that can take you where ever else you would like to go. If you have children, I highly recommend renting a car. They seem to get restless in the shuttle, especially with people they dont know.