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Seattle-Tacoma International Airport

A premier international gateway serving the Puget Sound region and Washington state

Operated by the Port of Seattle, Seattle-Tacoma International Airport (SEA, KSEA) is a world-class facility with a regional economic impact of over $16.3 billion. Sea-Tac generates more than 171,796 jobs (109,924 direct jobs) representing more than $2.8 billion in direct earnings and $565 million in state and local taxes. Twenty-two scheduled passenger airlines serve 77 non-stop domestic destinations and 22 international cities.

Air Passengers

  • 45.7 million in 2016 (3.4 million more people - an 8 percent increase over 2015)
  • Domestic passengers: 37,960,191 (+7.7 percent, 89.8 percent of total)
  • International passengers: 4,380,346 (+11.1 percent, 10.2 percent of total)
  • U.S. rank by passenger numbers: #9 (2016 rank) 
  • World ranking by passenger numbers: #40
  • Gates: 80
  • Approximately 74 percent of the airport’s passengers originate and/or terminate their itinerary at Sea-Tac

Air Cargo

  • 366,000 metric tons in 2016
  • U.S. rank by air cargo volume: #19 in 2015 

Aircraft Operations

  • 412,170 (+8.1 percent from 2015)
  • Average daily operations: 1,045
  • U.S. rank by operations: #22 in 2014 


  • Sea-Tac is a category IIIb certified airfield, allowing operations in all but the worst conditions
  • Three runways: (16L/34R – 11,901 feet; 16C/34C – 9,426 feet; 16R/34L – 8,500 feet)

Air Carriers

  • Twenty-eight airlines serve 77 nonstop domestic and 22 non-stop international cities.
  • Top carriers by passengers (percent of total): Alaska 51 percent, Delta 19.4 percent, Southwest, 7.7 percent, United 6.8 percent
  • Top carriers by domestic passengers: Alaska 50.1 percent, Delta 20 percent, Southwest 7.4 percent, United 6.3 percent
  • Top carriers by international passengers: Delta 31.9 percent, Alaska 24.2 percent, Emirates 8 percent, EVA Air 5.3 percent, Hainan Airlines 5 percent 


Top U.S. destinations ranked by scheduled flights:
  • Bay Area, California 11 percent (San Francisco, Oakland, San Jose)
  • Los Angeles 9.5 percent (LAX, Orange County, Burbank, Long Beach, Ontario)
  • Portland 6.8 percent
  • Anchorage 4.2 percent
  • Denver 4 percent 
Top international destinations ranked by scheduled flights:
  • 66.63 percent Canada (Vancouver 29.3 percent, Calgary 12.3 percent, Victoria 8.91, Edmonton 5.28 percent, Kelowna 4.28 percent)
  • 13.8 Asia (Seoul 4.7 percent, Tokyo 3.71 percent, Beijing 3.3 percent)
  • 11.1 percent Europe (London 4.56 percent, Amsterdam 2.65 percent)
  • 2.76 percent Middle East (Dubai)


Sea-Tac Airport was developed as a direct response to the World War II Pearl Harbor attack in 1941 when military needs limited civilian access to existing airports. The federal Civilian Aviation Authority sought a local government to develop new regional airport. The Port of Seattle accepted the challenge and selected Bow Lake in southwest King County for the new airfield. Runway construction was completed in 1944, civilian operation began in 1946, and a modern terminal building was dedicated on July 9, 1949.

Major Renovations/Highlights

  • Over the next five years, the Port of Seattle will spend $1.9 billion in airport improvements including major projects such as the renovation of the north satellite (NorthSTAR), reconstruction of the center runway, a new expanded International Arrivals Facility (IAF) and a new high-efficient, centralized baggage system.

  • Sea-Tac Airport’s Experience the City of Music program highlights local artists who put the northwest music scene on the map. New in 2015, EMP Museum's Pearl Jam concert poster art exhibit was unveiled, (near Gate A1) and features 85 posters from more than 30 artists. The program features overhead music from all NW musicians, live music performances daily throughout the terminal and security and information announcements by locals such as Macklemore, Quincy Jones and Jerry Cantrell of Alice in Chains.

  • In 2014 Sea-Tac was the first North American Airport to receive certification in reducing carbon emissions by the Airport Council International (ACI) Carbon Accreditation Program. Other award winning environmental programs include pre-conditioned air for airplane heating and cooling, charging stations for electric ground support vehicles on the ramp, recycling more than 1,705 tons of material each year, requiring fuel efficient and alternative fuel taxis and ground transportation vehicles, purchasing ‘green’ energy, plus industry-leading wildlife and stormwater management.

Sea-Tac Airport