List of Airlines at (SEA) airport

 

The following is a list of airlines serving Seattle Tacoma airport (SEA)

At Seattle–Tacoma International Airport (SEA), all airline check-in counters are centralized on the Ticketing Level of the Main Terminal. After passing through security, passengers access the different concourses (A, B, C, D, N, S) via the underground train system or walkways.

Concourse A

Hosts a mix of domestic and international airlines, including major operations from Delta and United.

Concourse B

Used mainly by low-cost carriers and regional operations.

Concourse C

Almost exclusively dedicated to Alaska Airlines operations.

Concourse D

Used by Alaska Airlines and American Airlines.

North Satellite (N Gates)

Modernized terminal serving as the main hub for Alaska Airlines.

South Satellite (S Gates)

Handles most long-haul international flights due to its customs facilities, including international Delta flights.

 

Latest updates: December 10, 2025

What do you have to arrange with the airline?

Many passengers do not know who to consult or make a claim to some doubts that arise before or after traveling, or any inconvenience that may occur.
 
Listed below are topics that need to be consulted, coordinated or resolved directly with the airline.
 
  Check in procedure
 
  Documentation and visa required
 
  Baggage weight limits, restricted and prohibited Items
 
  Baggage and excess billing rates
 
  Requirements for minors traveling alone or without parents
 
  Special passengers needing prior coordination with the airline: people with disabilities, reduced mobility and pregnant women
 
  Lost, delayed or damaged baggage reclaim
 
  Possible flight's changes of date or cancellations
 
  Confirmation of flight schedules (departures or arrivals)
 
  Flight status report (for possible delays, cancellations, rescheduling)
 
  In case your airline reschedules your flight, coordinate with the company for possible compensation, due to extra nights accomodation, food, flight connection lost, etc.
 
Remember that it is always advisable to have a traveler's assistance insurance, in case the airline does not respond to any inconvenience that might happen (baggage lost or damaged, cancellation or flight delay, etc.)

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  Seattle Tacoma airport (SEA)

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