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.
SEA has one Main Terminal, with airline check-in on Level 5 before security. The table doesn’t identify your check-in counter or guarantee today’s gate, so follow your boarding pass.
If another airline sold your ticket, look for the operating airline on your itinerary. The Port of Seattle says you check in with the airline operating the flight. That matters more than the logo at the top of your booking email.
Find your airline
| Airline | Concourse listed by SEA | Check-in at SEA |
|---|---|---|
| Aer Lingus | S | Main Terminal, Level 5 |
| Aeromexico | S | Main Terminal, Level 5 |
| Air Canada | S | Main Terminal, Level 5 |
| Air France | S | Main Terminal, Level 5 |
| Alaska Airlines | C, D, N | Main Terminal, Level 5 near Door 29. Self check-in kiosks, bag tags and bag drops also sit on Level 4 by Skybridges 5 and 6. |
| AMC (Air Mobility Command) | Check boarding pass | AMC Gateway flights to bases in Japan and Korea use the last six counters on Level 5, next to Checkpoint 2, before security. Check-in for duty passengers on travel orders opens 6 hours before departure. Space-A roll call is at the ticketing-level counters 3 hours before departure. |
| American Airlines | D | Main Terminal, Level 5 |
| ANA (All Nippon Airways) | S | Main Terminal, Level 5 |
| Asiana Airlines | S | Main Terminal, Level 5 |
| British Airways | S | Main Terminal, Level 5 |
| Cathay Pacific | S | Main Terminal, Level 5 |
| China Airlines | S | Main Terminal, Level 5 |
| Condor | S | Main Terminal, Level 5 |
| Delta Air Lines | A, B | Main Terminal, Level 5. Curbside check-in is on the upper departures drive near Door 17. |
| Emirates | S | Main Terminal, Level 5 |
| EVA Air | S | Main Terminal, Level 5 |
| Finnair | S | Main Terminal, Level 5 |
| Frontier Airlines | B | Main Terminal, Level 5 |
| Hainan Airlines | S | Main Terminal, Level 5 |
| Hawaiian Airlines | S | Main Terminal, Level 5. An Alaska and Hawaiian Guest Services point is on this level. |
| Icelandair | S | Main Terminal, Level 5 near Door 19 |
| Japan Airlines | S | Main Terminal, Level 5 |
| JetBlue Airways | S | Main Terminal, Level 5 |
| Korean Air | S | Main Terminal, Level 5 |
| Lufthansa | S | Main Terminal, Level 5 |
| Philippine Airlines | S | Main Terminal, Level 5 |
| Qatar Airways | S | Main Terminal, Level 5. |
| SAS | S | Main Terminal, Level 5 |
| Singapore Airlines | S | Main Terminal, Level 5 |
| Southwest Airlines | B | Main Terminal, Level 5 |
| STARLUX Airlines | S | Main Terminal, Level 5 |
| Sun Country Airlines | Check boarding pass | Main Terminal, Level 5 |
| Turkish Airlines | S | Main Terminal, Level 5 |
| United Airlines | B | Main Terminal, Level 5 |
| Virgin Atlantic | S | Main Terminal, Level 5 |
| Volaris | S | Main Terminal, Level 5 |
| WestJet | A, B | Main Terminal, Level 5 |
For AMC and Sun Country, the Port gives no fixed concourse. Use the one on your boarding pass.
If the operating airline on your itinerary isn’t in this table, use the Port of Seattle’s airline contacts or ask airport staff before you go through security.
Where your bags come out
Domestic arrivals use baggage claim carousels listed by airline:
| Airline | Carousels |
|---|---|
| Aer Lingus | 2 |
| Air Canada | 9 |
| Alaska Airlines | 7, 9, 10, 11, 12, 14 and 16 |
| American Airlines | 13 |
| Delta Air Lines | 2, 3, 4, 5 and 6 |
| Frontier Airlines | 7 |
| Hawaiian Airlines | 2 |
| JetBlue Airways | 3 |
| Southwest Airlines | 10 and 11 |
| Sun Country Airlines | 2 |
| United Airlines | 9 |
From check-in to the right gate
If you’re flying Alaska and coming from the parking garage or Link station, you can use the Level 4 bridge check-in without going up to ticketing. See our Alaska check-in guide for that route.
You can use any open security checkpoint to reach any gate. Checkpoint 6 is near C, D and N and lists hours of 4 a.m. to 10 p.m. Checkpoint 4 is open 24 hours.
If you need wheelchair help for American, Sun Country or Virgin Atlantic, the Wheelchair & ADA Assistance Area is on the departures level by Door 23, before security. Contact your airline to arrange wheelchair service.
After security, A, B, C and D connect on foot. For S, take the SEA Underground Blue Line from A or B Station. For N, take the Green Line from C or D Station. During train outages, buses serve those satellite concourses. The Yellow Line links A and D Stations if you need to change between the south and north loops.
Sources
- Our airline directory, Main Terminal page and security page
- Our military travel guide, wheelchair assistance page and Alaska check-in guide
- Our parking page and Link light rail page
- The Port of Seattle’s airline directory
- The Port of Seattle’s SEA Underground guide