Seattle–Tacoma International Airport

Seattle–Tacoma International Airport carries the IATA code SEA — the three letters printed on boarding passes and baggage tags — and the ICAO code KSEA, used in flight plans and by air traffic control. It serves Seattle, United States.

IATA codes are assigned by the International Air Transport Association for passenger-facing use; the four-letter ICAO code encodes region and country and belongs to the operational side of aviation.