Airline and terminal guides

Which airlines use which terminal at SEA, and what that means for check-in, security and connections. The guides answer the terminal question for each part of the airport; each airline has its own page with its counters and gates.

Looking for the listings themselves? They are on the Airlines at SEA page.

• Alaska Airlines at SEA: concourses and check-in

  Alaska flies from Concourses C, D and N at SEA. Find check-in near Door 29, take the train to N, and see all three Alaska Lounges' hours.

  • Arriving for an Alaska flight
  • Find your gate after security
  • Alaska Lounges at SEA
  • Sources
• Delta at SEA: concourses, check-in and lounges

  Delta uses SEA's A and B Concourses. Find check-in, the nearest checkpoints and the three Delta lounges with their daily hours.

  • From Delta check-in to your gate
  • Which Delta lounge is on your way?
  • If you’re arriving or connecting
• Every airline at Seattle airport, A to Z

  Find SEA's 37 listed airlines: Delta on A and B, United and Southwest on B, American on D, Alaska on C, D and N. Check in on Level 5.

  • Find your airline
  • Where your bags come out
  • From check-in to the right gate
  • Sources
• International airlines at SEA: the S Concourse

  British Airways, Emirates, Lufthansa, Korean Air and more leave from SEA's S Concourse. Clear any checkpoint, then ride the Blue Line train to S Station.

  • Which airlines are listed at S?
  • From check-in to the S gates
  • Landing on an international flight
  • Food and a lounge at S
  • Sources