Seattle, Washington

Seattle/Tacoma International Airport (SEA)

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.

Airport Location
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

Alaska and Horizon Ticket Counter Hours
Daily: 3:45 am - 11:00 pm

Gate Locations
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 Location
North Satellite, C Concourse and D Concourse (limited hours).

Airport Check-In Kiosk Locations
  • Ticketing/Bag Drop-off Area
  • Parking garage skybridge nearest Horizon Air
  • Parking garage skybridge nearest Alaska Airlines
  • Concourse D - left of Alaska Airlines Service Center
  • Gates C1, C3 and C10
Offsite Check-In Kiosk Locations
  • Thrifty Rent-A-Car Parking Lot
  • West Coast Sea-Tac Hotel / Masterpark Lot A inside hotel lobby
  • Masterpark Lot B at S 170th and International Blvd
  • Budget Parking Lot
  • Dollar Park-N-Fly Lot
  • Doubletree Hotel lobby
Board Room

Air Cargo Pickup/Drop-off