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Airport Basics

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 ranked as the eighth busiest U.S. airport, serving 49.8 million passengers and more than 432,315 metric tons of air cargo in 2018. With a regional economic impact of more than $22.5 billion in business revenue, Sea-Tac generates more than 151,400 jobs (87,300 direct jobs), representing over $3.6 billion in direct earnings and more than $442 million in state and local taxes. Thirty-two passenger airlines serve 91 non-stop domestic destinations and 29 international destinations including Canada, Mexico, and seasonal operations.

Air Passengers

  • 49.8 million in 2018 (6.2% increase over 2017)
  • Domestic passengers: 44,421,969 (+6.2%, 89.1% of total)
  • International passengers: 5,427,551 (+5.7%, 10.9% of total)
  • U.S. rank by passenger numbers: #8 (2018 rank)
  • World ranking by passenger numbers: #31
  • Gates: 80
  • Approximately 70% of the airport’s passengers originate and/or terminate their itinerary at Sea-Tac

Air Cargo

  • 432,315 metric tons in 2018 (1.5 percent from 2017)
  • U.S. rank by air cargo volume: #19 in 2018
  • North American air cargo volume: #20 in 2018

Aircraft Operations

  • 438,391 takeoffs and landings at Sea-Tac Airport in 2018
  • Aircraft operations increased 5.3 percent from 2017
  • Air carrier, 97% of total operations
  • Air taxi, 2% of total operations
  • 15th busiest U.S. commercial service airport (2016 rank)

Runways

Sea-Tac Airport operates with three category IIIb certified runways using ASR-9 and ASDE-X radars which reduce congestion and delays:

  • 16L/34R - 11,901 feet, concrete/grooved
  • 16C/34C - 9,426 feet, concrete/grooved
  • 16R/34L - 8,500 feet, concrete/grooved

Detailed information on Sea-Tac Airport is available on http://www.airnav.com/airport/KSEA.

Air Carriers

Top carriers by passengers (percent of total):

  • Alaska 50.6%
  • Delta 23.3%
  • United 6.2%
  • Southwest, 6.2%

Top carriers by domestic passengers:

  • Alaska 50.1%
  • Delta 20%
  • Southwest 7.4%
  • United 6.3%

Top carriers by international passengers:

  • Delta 29.8%
  • Alaska 21.9%
  • Air Canada 4.9%
  • EVA Air 4.8%
  • Emirates 4.8%

Destinations

  • 32 airlines
  • 91 non-stop domestic destinations
  • 29 international destinations
  • Roughly 70 percent of the airport’s passengers originate and/or terminate their itinerary at Sea-Tac

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)

History

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.

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