Menu Home

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 9th busiest U.S. airport, serving 46.9 million passengers and more than 425,800 metric tons of air cargo in 2017. 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. Twenty-eight passenger airlines serve 87 non-stop domestic destinations and 23 international cities.

Air Passengers

  • 46.9 million in 2017 (2.6 percent increase over 2016)
  • 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

  • 425,857 metric tons in 2017
  • U.S. rank by air cargo volume: #19 in 2016

Aircraft Operations

  • 416,124 takeoffs and landings at Sea-Tac Airport in 2017 (Increase of 1 percent from 2016)
  • Average daily operations: 1,045
  • U.S. rank by operations: #15 busiest in 2016

Runways

  • Sea-Tac Airport operates 24/7 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

  • Twenty-eight airlines serve 87 nonstop domestic and 23 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

Destinations

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.

Back to Top