When to Arrive at the Airport
With bags: 2 hours* prior to scheduled departure
Without bags: 90 minutes* prior to scheduled departure
Please see our Check-in and Boarding Cut-off Times.
* 60 minutes for MVP Gold Members and Portland Shuttle passengers using the express security line.
Note: Construction is underway for the next few years to upgrade your Sea-Tac Airport
experience. Learn more about this project.
17801 International Blvd, Seattle, WA 98158
(14 miles south of Seattle; 20 miles north of Tacoma)
Ticket Counter Location
North end of terminal
An Alaska Airlines Airport of the Future® check-in location
Daily: 3:45 am - 11:00 pm
Alaska: Concourse C, Concourse D, Gates 1 - 3 and 10 - 11, North Satellite, Gates 1 - 3, 6 - 11 and 14 - 16 (International flights may arrive at the S Concourse)
Horizon: Concourse C, S, North Satellite, Gates 12 and 13, (International flights may arrive at the S Concourse)
Service Center LocationNorth Satellite, C Concourse and D Concourse (limited hours).
Check-In Kiosk Locations
- Self-service kiosks are available in the airport lobby near the ticketing/bag drop-off area.
View Seattle Board Room Information
Air Cargo Pickup/Drop-off
Seattle Cargo Information