Seattle–Tacoma International Airport

Seattle–Tacoma International Airport (IATA: SEA, ICAO: KSEA, FAA LID: SEA), branded as SEA Airport and also referred to as Sea–Tac (/ˈsiːtæk/), is the primary commercial airport serving the Seattle metropolitan area in the U.S. state of Washington. It is in the city of SeaTac, which was named after the airport's nickname “Sea-Tac”, approximately 14 miles (23 km) south of Downtown Seattle and 18 miles (29 km) north-northeast of Downtown Tacoma.[3] The airport is the busiest in the Pacific Northwest region of North America and is owned by Port of Seattle.

"Seattle Airport" and "SeaTac" redirect here. For the other airport in the city, see Boeing Field. For the city, see SeaTac, Washington. For other uses, see SeaTac (disambiguation).

Seattle–Tacoma International Airport
SEA Airport in August 2012, looking north
Summary
Airport typePublic
Owner/OperatorPort of Seattle
ServesSeattle metropolitan area
LocationSeaTac, Washington, U.S.
Opened1944 (1944)
Hub for
Elevation AMSL433 ft / 132 m
Coordinates47°26′56″N 122°18′34″W
Websitewww.portseattle.org/sea-tac
Maps
FAA diagram
FAA diagram
Runways
Direction Length Surface
ft m
16L/34R 11,901 3,627 Concrete
16C/34C 9,426 2,873 Concrete
16R/34L 8,500 2,591 Concrete
Statistics (2022)
Passengers45,964,321
Aircraft movements401,351
Air cargo (metric tons)456,289
Sources: FAA[1] and airport website[2]

The entire airport covers an area of 2,500 acres (3.9 sq mi; 10 km2),[1][4] much smaller than other U.S. airports with similar annual passenger numbers.[5] The airport has flights to cities throughout North America, Oceania, Europe, the Middle East, and Asia. It is the primary hub for Alaska Airlines, whose headquarters are near the airport.[6] It is also a hub and international gateway for Delta Air Lines, which has expanded at the airport since 2011. As of 2022, 31 airlines operate at SEA, serving 91 domestic and 28 international destinations.[7]

History

The airport was built by the Port of Seattle in 1944 after the U.S. military took control of Boeing Field in World War II. The Port received $1 million from the Civil Aeronautics Administration and $100,000 from the City of Tacoma to build the airport. The first scheduled airline flights were Northwest and Trans-Canada in 1947; Western and United moved from Boeing Field during the next couple of years, and Pan Am moved in 1952–53, but West Coast and successors Air West and Hughes Airwest stayed at Boeing Field until 1971. The original terminal was designed by architect Herman A. Moldenhour. The official opening ceremony took place on July 9, 1947, in front of a crowd of 30,000.[8]

In June 1951, four runways were at 45-degree angles, between 5,000 and 6,100 feet (1,500 and 1,900 m) long; the northeast–southwest and northwest–southeast runways intersected just west of the north–south runway that eventually became today's runway 34R. Runway 34 was lengthened to 7500 ft in 1951, to 8500 ft by 1958, and to 11900 ft by 1962. The extension required the construction of an automobile tunnel for South 188th Street, which opened in July 1961.[9] Runway 34L replaced runway 2 around 1970.

The April 1957 OAG shows 216 departures a week on United, 80 on Northwest, 35 on Western, 21 on Trans-Canada, 20 on Pan Am, 20 on Pacific Northern (PNA, the successor of Woodley Airways) and 10 on Alaska Airlines. The first jet flights were Pan Am Boeing 707s to Honolulu via Portland (OR) in late 1959 (Pan Am's timetable for September 27 shows a weekly jet). In 1966, Scandinavian Airlines began the airport's first non-stop flight to mainland Europe (Pan Am nonstops to London began around 1961). The first concourse opened in July 1959.

The two-story North Concourse (later dubbed Concourse D) added four gate positions and a new wing 600 feet (180 m) long and 30 feet (9.1 m) wide.[10] The one-story South Concourse (now Concourse A) opened in 1961, adding another 688 feet (210 m) to the length of the airport.[10] The 800-foot (240 m) long Concourse B opened in December 1964. It added eight gate positions, bringing the total to 19, a 12,000 square feet (1,100 m2) area housing international arrivals and the offices of U.S. Customs, Immigration, Public Health and the Department of Agriculture.[10] Concourse C opened in July 1966.[10] Just four years later, it was extended to include another 10 gates, bringing the total to 35.[10] The Port embarked on a major expansion plan, designed by The Richardson Associates[11] and lasting from 1967 to 1973, adding a second runway, a parking garage, two satellite terminals and other improvements. In 1973, $28-million new terminal was built over and around the 1949 structure; the new terminal quadrupled the area for public use.[10][12] On July 1, 1973, the Airport opened two new satellite terminals, along with an underground train system to connect them to the Main Terminal.[13][12] These fully automatic shuttle trains were the first of their kind in the United States.[12] Also unprecedented in any U.S. airport: as part of the expansion the Port commissioned $300,000 worth of artworks; these were the start of what would become a large public art collection owned by the Port.[12] In the mid-1980s, the Main Terminal was renovated and another 150 feet (46 m) was added to the north end.[10] Concourse D was expanded in 1987 with a rotunda that added four new gates.[10] In 1993, Concourses B, C, and D were renovated. The project, designed by NBBJ, included the addition of 150,000 square feet (14,000 m2) and the renovation of 170,000 square feet (16,000 m2) of space in Concourses B, C, and D.[14] On June 15, 2004, the 2,102-foot (641 m) new Concourse A was unveiled with 14 new gates, a dozen new restaurants, new artwork and the airport's first moving sidewalks.[10]

Residents of the surrounding area filed lawsuits against the Port in the early 1970s, complaining of noise, vibration, smoke, and other problems. The Port and the government of King County adopted the Sea–Tac Communities Plan in 1976 to address problems and guide future development. The Port spent more than $100 million over the next decade to buy homes and school buildings in the vicinity, and soundproof others nearby. In the mid-1980s, the airport participated in the airport noise-compatibility program initiated by Congress in 1979. Airport-noise contours were developed, real estate was purchased and some homes were retrofitted to achieve noise mitigation.[15]

In 1978 the U.S. ended airline regulation, and the U.S. airlines were allowed to determine routes and fares without government approval. Deregulation resulted in some new service to Seattle, including from TWA, then the fourth-largest U.S. airline, as well as Delta, National, and American.

Alaska and United planes at the North Satellite Terminal in 2008
Sea–Tac Airport in September 2007 as runway 16R/34L was under construction (opened November 2008)

After the death of U.S. Senator Henry Martin "Scoop" Jackson in 1983, the Seattle Port Commission voted to change the airport's name to the Henry M. Jackson International Airport. Citizens of Tacoma interpreted the change as an insult to their community—the second time in the airport's history that the port authorities had attempted to remove "Tacoma" from the name. The $100,000 Tacoma had provided for the airport's construction during World War II had come with an explicit promise that the city would be included in the airport's name. An additional complicating factor was the existence of another Jackson International Airport (now Jackson–Medgar Wiley Evers International Airport) in Jackson, Mississippi, whose management threatened legal action to preserve its exclusive use of the name. The controversy was resolved after polls of Seattle and Tacoma area residents showed their preference for the original name by margins as much as 5:1. Helen Jackson, the widow of the late Senator Henry M. Jackson, expressed her desire that their family remain neutral in the debate. With a 3–2 vote of the Port of Seattle Commission, the name reverted to Seattle–Tacoma International Airport in early 1984.[16]

In the late 1980s, the Port of Seattle and a council representing local county governments considered the future of air traffic in the region and predicted that the airport could reach capacity by 2000. In 1992, the planning committee concluded that the best solution was to add a third runway to the airport and construct a supplemental two-runway airport in one of the neighboring counties. Members of the community opposed a third runway, as did the Highline School District and the cities of Des Moines, Burien, Federal Way, Tukwila, and Normandy Park,[17] but a 1994 study concluded there were no feasible sites for an additional airport. The Port of Seattle approved a plan for the new runway in 1996, prompting a lawsuit from opponents. The Port secured the necessary permits by agreeing to noise reduction programs and environmental protections. Runway opponents appealed these permits, but dropped their challenges in 2004.

Recent years

The airport's Central Terminal building was renovated and expanded in 2003 in a project designed by Curtis W. Fentress, of Fentress Architects.

The third runway opened on November 20, 2008, with a construction cost of $1.1 billion. Parallel to the existing two, the new runway is 2500 ft west of runway 34R, allowing landings on both in times of low visibility. The older runways are 800 ft apart, too close to allow use of both in low visibility.[18]

In 2014, Delta Air Lines announced plans to expand Seattle into a transpacific hub. Since then, Delta has added numerous international flights and dozens of domestic flights to feed those services. Delta's increased presence in Seattle has been seen by some industry analysts as a response to United Airlines' transpacific hub at San Francisco, as well as Delta's disenchantment with its former Tokyo–Narita hub.[19]

In late 2021, shortly after Alaska Airlines joined American Airlines in the Oneworld alliance, American announced that they would increase their international presence in Seattle.[20][21] However, as of 2023, American had abandoned plans for long-haul flights to Asia from Seattle and was only flying to London-Heathrow seasonally.[22]

The North Satellite Terminal only received limited upgrades since it opened in 1973, and needed modernization.[23] The Port of Seattle initially looked at simply updating the terminal in a project it called the North Satellite Renovation Plan (NorthSTAR). In 2016, the Port announced it would also significantly expand the terminal. The $550 million project called the North Satellite Modernization increased the size of the North Satellite by 201,000 square feet[24] and another eight gates, bringing the total to 20. The project's first phase, dedicated on July 11, 2019, expanded the terminal to the west by 240 feet (73 m) and added eight gates, a mezzanine level with eateries, and a rooftop lounge for Alaska Airlines. The second phase modernized the remaining areas of the old terminal and expands dining and retail space around the twenty existing gates. The new terminal opened on June 29, 2021.[25][26]

The IAF Pedestrian Walkway at Sea-Tac.

In 2022, the Port of Seattle completed a new 450,000-square-foot International Arrivals Facility (IAF) east of Concourse A, along with a 900-foot-long high bridge that will take passengers from the South Satellite, up 85 feet above the existing taxiway and over the top of Concourse A.[27] The project was initially expected to be completed by 2021 at a cost of $766 million,[28][29] though revised to $968 million in late 2018.[30] The old customs and immigration facility was located in the basement of the South Satellite, and operated well over its design capacity. Additionally, the process for passengers was complicated by the satellite's isolated location.[31] With the opening of the new IAF, Concourse A will now also be used for arriving international flights, nearly doubling the number of gates capable of serving arriving international passengers. The South Satellite Terminal is also planned to be renovated.[24] The IAF was initially designed to accommodate 20 widebody aircraft, but four gates were not built to those specifications; the discrepancy was described as a "design flaw" by the Port of Seattle and blamed on the project's contractor.[32]

Future

SEA Airport has seen record growth in passenger traffic over the last few years. The busiest day for outbound passengers was July 24, 2023 with 73,651 passengers. More than 198,000 passengers (departing, arriving, and connecting) passed through the airport that day. The previous record for outbound passengers was set on August 16, 2019 at 72,154.[33] That growth has been partly fueled by the nationwide expansion of Seattle-based Alaska Airlines and by Delta Air Lines setting up a major international hub at SEA Airport. That growth has strained the airport's facilities and led the port to invest more than $2 billion into several expansion and renovation projects.[34]

SEA Airport has six outbound baggage handling systems with limited to no cross-connectivity. The system now in place is aging and reaching its maximum capacity. A $320.4 million project will create one unified, high-speed baggage system under the airport.[24] That will allow bags to be checked from any ticketing counter, to receive security screening faster, and to be routed to any gate in the airport. The extra efficiency and speed will allow the airport to handle more baggage in the future without expanding the footprint of the baggage handling systems. The initial phase of the project was finished in 2018 and the entire system will be in place by 2023.[26]

With estimates that the Puget Sound region will grow by another one million people by 2035, the Port of Seattle began developing the Sustainable Airport Master Plan (SAMP) in 2018 to meet passenger and cargo demands. The SAMP recommends more than 30 projects to improve efficiency and airport access, including a new terminal with 19 gates and an automated people mover through three separate stations.[35] More future projects that are in progress or will begin later are an automated parking garage guidance system, expansion of Concourse C, roadway improvements throughout the airport, Checkpoint 1 relocation, a gateway project in cooperation with Alaska Airlines, restroom renovations, Concourse A building expansion for lounges, improved curbside safety and accessibility, continued refurbishment of the Central Terminal, and a replacement of controls pertaining to the SEA Underground shuttles.

Facilities

Terminals
Central terminal with views of the runways
SEA Airport terminal buildings with Mount Rainier in the distance

SEA has 103 gates in four concourses and two satellite buildings.[36] The two satellite terminal buildings, named the North and South Satellites, are connected to the four concourses in the main terminal by a three-line automated people mover system called the SEA Underground. The underground transit system moves passengers within the four concourses of the central terminal and out to the two satellite terminals. All non-precleared international arrivals arrive at the South Satellite or Concourse A, regardless of their departure terminal.[37]

  • Concourse A contains 16 gates.[36]
  • Concourse B contains 17 gates.[36]
  • Concourse C contains 27 gates.[36]
  • Concourse D contains 17 gates.[36]
  • North Satellite contains 20 gates.[36]
  • South Satellite contains 14 gates.[36]

Airfield
The interior of SEA Airport's control tower, commissioned in 2004, is 850 sq ft (79 m2). At the center is a radar display; at the top right is the light gun.

The three parallel runways run nearly north–south, west of the passenger terminal, and are 8,500 to 11,900 feet (2,600–3,600 m) long. In 2018, the airport averaged 1,233 aircraft operations per day, 99% being commercial flights, 1% air taxi operations, and less than 1% transient general aviation and military.[38]

A new control tower was built beginning in 2001 and opened in November 2004, at the cost of $26 million.[39] The floor of the new tower's control cab is 233 ft (71 m) above ground level; the tower's overall height including antennas is 269 ft (82 m). The cab has 850 sq ft (79 m2) of space and was designed to support operation by ten controllers, with possible future expansion up to 15. The site and construction method of the tower were designed to maximize the visibility and efficacy of radar systems. The airport's original control tower, built in the 1950s, is now part of the passenger terminal and used as a ramp control tower after being repaired from damage caused by the 2001 Nisqually earthquake.

A recurring problem at the airport is the misidentification of the westernmost taxiway, Taxiway Tango, as a runway. A large "X" has been placed on the north end of the taxiway, but many aircraft have landed on the taxiway.[40] The FAA issued an alert notice dated from August 27, 2009, to September 24, 2009, urging airplanes about taking precautions such as REILs and other visual cues while landing from the north.

In 2007, the airport became the first to implement an avian radar system providing 24-hour monitoring of wildlife activity across the airfield. This pilot program, designed and implemented with the assistance of the University of Illinois Center of Excellence for Airport Technology (CEAT), was intended to decrease potentially fatal incidents involving collisions with birds and to provide a test bed for the implementation of the technology in the US, which was expected to begin in 2009. The technology is part of a strategy to reduce the presence of wildlife on the airfield.[41]

The Seattle office of the National Weather Service operates a weather station at the airport, with a temperature gauge between the center and eastern runways. The airport has served as Seattle's official weather recording location since 1945.[42]

Ground transportation
An airport-bound Link light rail train in the Downtown Seattle Transit Tunnel

The site of SEA Airport was chosen partly due to its location along State Route 99, approximately midway between Seattle and Tacoma. Interstate 5 and Interstate 405 also converge near the airport, with an easy connection to the airport via State Route 518 and the Airport Expressway. State Route 509 runs west of the airport, connecting the area to West Seattle. The airport is the largest generator of vehicle trips in the state.[43]

The Port of Seattle offers paid on-site parking in a 12,100-space garage, notable for being North America's largest parking structure under one roof.[44] The airport also offers valet parking and electric vehicle charging stations. Several privately owned parking facilities are located off-site near the airport with shuttle access.[45]

The airport is served by the 1 Line of Sound Transit's Link light rail system at the SeaTac/Airport station with frequent service to downtown Seattle and the University of Washington. The station opened on December 19, 2009, and is connected to the airport terminal via a pedestrian bridge to the airport parking garage.[46] Another pedestrian bridge over International Boulevard is used to access the city of SeaTac, nearby airport hotels, and King County Metro buses including RapidRide A Line. A 1.6-mile light rail extension south to Angle Lake station at South 200th Street opened on September 24, 2016.

The airport is also served both by the King County Metro bus system and Sound Transit regional express buses. Sound Transit buses offer service to West Seattle, White Center, Burien, Renton, Newcastle and Bellevue through Route 560. In contrast, Route 574 offers service to Lakewood via Des Moines, Federal Way, and Tacoma.

Tukwila Station, which is approximately 5 miles east of the airport, is served by Sounder commuter rail and Amtrak Cascades regional inter-city rail with service north to Vancouver, Canada, and service south to Portland and Eugene in Oregon. This station can be reached in about 30 minutes via the Central Link light rail or the RapidRide A Line bus service and transferring at Tukwila International Boulevard station to the RapidRide F Line bus service.[47]

The airport serves door-to-door shuttle services (Shuttle Express and Speedi Shuttle) and several scheduled airporter bus services. Airporters include Bellair Charters to Yakima and Bellingham, and the Quick Shuttle to downtown Vancouver, Canada, through Quick Shuttle, with other pick-up stops at downtown Seattle, Bellingham International Airport, and drop-off stops just inside the Canadian–U.S. boundary and at the Vancouver International Airport.[48]

Taxis, limousines, and transportation network companies (Lyft, Uber and Wingz) are also available.[49] Prior to 2019, the Port of Seattle contracted out taxi services to an independent company, but changed to direct management with drivers due to protests over high access fees. As of 2023, the airport has 409 taxi drivers who are part of the Teamsters Local 117 labor union.[50]

A 23-acre (9.3 ha) consolidated rental car facility opened on May 17, 2012.[51][52] The facility is at the northeastern portion of the airport at the intersection of South 160th Street and International Boulevard South. The facility has 5,400 parking spaces[53] and can handle up to 14,000 transactions per day.[53] After the opening of the facility, 3,200 parking spaces in the central parking structure opened for general use.[54] Passengers reach the facility on a five-minute trip aboard one of 29 low-floor Gillig CNG buses.[53] Previously, only Alamo, Avis, Sixt, Budget, Hertz and National had cars on site. Advantage, Dollar, Enterprise, Thrifty, EZ Rent-A-Car and Fox Rent A Car ran shuttles to off-site locations. As of 2012, Rent-a-Wreck was the last remaining company to not relocate to the consolidated facility and continue using their own shuttles.[53]

Airlines and destinations

Passenger
AirlinesDestinationsRefs
Aer Lingus Dublin [55]
Aeroméxico Mexico City [56]
Air Canada Toronto–Pearson
Seasonal: Montréal–Trudeau 		[57]
Air Canada Express Vancouver [57]
Air France Paris–Charles de Gaulle [58]
Air Tahiti Nui Papeete, Paris–Charles de Gaulle[59][60] [61]
Alaska Airlines Albuquerque, Anchorage, Atlanta, Austin, Baltimore, Bellingham, Billings, Boise, Boston, Bozeman, Burbank, Calgary, Cancún, Charleston (SC), Chicago–O'Hare, Cincinnati, Cleveland, Columbus–Glenn, Dallas/Fort Worth, Dallas–Love, Denver, Detroit, Edmonton, El Paso, Eugene, Fairbanks, Fort Lauderdale, Fort Myers, Fresno, Glacier Park/Kalispell, Great Falls, Helena, Honolulu, Houston–Intercontinental, Idaho Falls, Indianapolis, Jackson Hole, Juneau, Kahului, Kailua-Kona, Kansas City, Ketchikan, Las Vegas, Lihue, Los Angeles, Medford, Miami, Milwaukee, Minneapolis/St. Paul, Missoula, Monterey, Nashville, Newark, New Orleans, New York–JFK, Oakland, Oklahoma City, Omaha, Ontario, Orange County, Orlando, Palm Springs, Philadelphia, Phoenix–Sky Harbor, Pittsburgh, Portland (OR), Puerto Vallarta, Pullman, Raleigh/Durham, Redding, Redmond/Bend, Reno/Tahoe, Sacramento, St. Louis, Salt Lake City, San Antonio, San Diego, San Francisco, San Jose (CA), San José del Cabo, San Luis Obispo, Santa Barbara, Santa Rosa, Spokane, Sun Valley, Tampa, Tri-Cities (WA), Tucson, Vancouver, Victoria, Walla Walla, Washington–Dulles, Washington–National, Wenatchee, Wichita, Yakima
Seasonal: Belize City, Hayden/Steamboat Springs, Kelowna, Nassau (begins December 15, 2023),[62] Sitka 		[63]
All Nippon Airways Tokyo–Haneda [64]
American Airlines Charlotte, Chicago–O'Hare, Dallas/Fort Worth, Miami, Philadelphia, Phoenix–Sky Harbor
Seasonal: London–Heathrow[65] 		[66]
American Eagle Los Angeles [66]
Asiana Airlines Seoul–Incheon [67]
British Airways London–Heathrow [68]
Condor Frankfurt [69]
Delta Air Lines Amsterdam, Anchorage, Atlanta, Austin, Boston, Cancún, Chicago–O'Hare, Cincinnati, Dallas/Fort Worth (resumes July 8, 2024),[70][71] Denver, Detroit, Fairbanks, Fort Lauderdale, Honolulu, Juneau, Kahului, Kailua-Kona, Kansas City, Las Vegas, Lihue, London–Heathrow, Los Angeles, Minneapolis/St. Paul, Nashville, New York–JFK, Ontario,[72] Orange County, Orlando, Paris–Charles de Gaulle, Phoenix–Sky Harbor, Portland (OR), Puerto Vallarta, Raleigh/Durham, Sacramento, Salt Lake City, San Diego, San Francisco, San Jose (CA), San José del Cabo, Seoul–Incheon, Shanghai–Pudong, Spokane, Tampa, Tokyo–Haneda, Tucson, Washington–Dulles
Seasonal: Palm Springs 		[73]
Delta Connection Boise, Eugene, Lewiston,[74] Medford, Portland (OR), Redmond/Bend, Sacramento, San Francisco, San Jose (CA), Spokane, Tri-Cities (WA), Vancouver
Seasonal: Ketchikan, Sitka 		[73]
Emirates Dubai–International [75]
EVA Air Taipei–Taoyuan [76]
Finnair Seasonal: Helsinki [77]
Frontier Airlines Denver, Las Vegas, Phoenix–Sky Harbor [78]
Hawaiian Airlines Honolulu, Kahului [79]
Icelandair Reykjavík–Keflavík [80]
Japan Airlines Tokyo–Narita [81]
JetBlue Boston, Los Angeles, New York–JFK [82]
Korean Air Seoul–Incheon [83]
Lufthansa Frankfurt, Munich (begins May 30, 2024)[84] [85]
Qatar Airways Doha [86]
Singapore Airlines Singapore [87]
Southwest Airlines Chicago–Midway, Denver, Las Vegas, Oakland, Phoenix–Sky Harbor, Sacramento, San Jose (CA)
Seasonal: Dallas–Love, Kansas City, St. Louis 		[88]
Spirit Airlines Las Vegas [89]
Sun Country Airlines Minneapolis/St. Paul [90]
Turkish Airlines Istanbul [91]
United Airlines Chicago–O'Hare, Denver, Houston–Intercontinental, Los Angeles, Newark, San Francisco, Washington–Dulles [92]
United Express Los Angeles
Seasonal: Denver, San Francisco 		[92]
Virgin Atlantic London–Heathrow [93]
Volaris Guadalajara [94]
WestJet Seasonal: Calgary [95]
WestJet Encore Seasonal: Calgary, Edmonton [96]

Cargo
AirlinesDestinations
AeroLogic Frankfurt
Alaska Air Cargo Anchorage, Cordova, Juneau, Ketchikan, Sitka, Yakutat
Aloha Air Cargo Honolulu,[97] Los Angeles
Amazon Air Allentown/Bethlehem, Anchorage, Cincinnati, Hartford/Springfield, New York–JFK, Ontario, San Bernardino
Ameriflight Spokane
Asiana Cargo Chicago–O'Hare, Dallas/Fort Worth, Seoul–Incheon
Cargolux Calgary, Glasgow–Prestwick, Los Angeles, Luxembourg
China Airlines Cargo Anchorage, Chicago–O'Hare, Columbus–Rickenbacker, Miami, New York–JFK, Taipei–Taoyuan
DHL Aviation Cincinnati, Los Angeles, San Francisco, Seoul–Incheon, Vancouver
EVA Air Cargo Anchorage, Dallas/Fort Worth, Taipei–Taoyuan
FedEx Express Anchorage, Dallas/Fort Worth, Fort Worth/Alliance, Indianapolis, Los Angeles, Memphis, Oakland, Ontario, Portland (OR)
FedEx Feeder Bellingham, Burlington, Friday Harbor, Orcas Island, Port Angeles
Kalitta Air Los Angeles, Vancouver
Korean Air Cargo Chicago–O'Hare, Los Angeles, Seoul–Incheon
Lufthansa Cargo Frankfurt
Singapore Airlines Cargo Anchorage, Chicago–O'Hare, Dallas/Fort Worth, Singapore

Statistics

Top destinations
Busiest domestic routes from SEA (June 2022 – May 2023)[98]
Rank City Passengers Carriers
1 Anchorage, Alaska 994,000 Alaska, Delta
2 Las Vegas, Nevada 953,000 Alaska, Delta, Frontier, Southwest, Spirit
3 Phoenix–Sky Harbor, Arizona 882,000 Alaska, American, Delta, Southwest
4 Los Angeles, California 880,000 Alaska, American, Delta, JetBlue, United
5 Denver, Colorado 826,000 Alaska, Delta, Frontier, Southwest, United
6 San Francisco, California 742,000 Alaska, Delta, United
7 Chicago–O'Hare, Illinois 687,000 Alaska, American, Delta, Spirit, United
8 Portland, Oregon 624,000 Alaska, Delta
9 San Diego, California 616,000 Alaska, Delta
10 Dallas/Fort Worth, Texas 587,000 Alaska, American
Busiest international routes from SEA (October 2021 – September 2022)[99]
Rank City Passengers Carriers
1 Canada Vancouver, Canada 502,970 Air Canada, Alaska, Delta
2 United Kingdom London–Heathrow, United Kingdom 301,718 American, British Airways, Delta, Virgin Atlantic
3 Mexico San José del Cabo, Mexico 242,795 Alaska, Delta
4 Netherlands Amsterdam, Netherlands 242,031 Delta
5 South Korea Seoul–Incheon, South Korea 227,755 Asiana Airlines, Delta, Korean Air
6 Germany Frankfurt, Germany 210,283 Condor, Lufthansa
7 Mexico Cancún, Mexico 206,460 Alaska, Delta
8 France Paris–Charles de Gaulle, France 203,217 Air France, Delta
9 Qatar Doha, Qatar 187,881 Qatar Airways
10 Mexico Puerto Vallarta, Mexico 187,377 Alaska, Delta

Airline market share
Top airlines at SEA (September 2021 - August 2022)[100]
Rank Airline Passengers Percent of market share
1 Alaska Airlines 18,477,000 47.82%
2 Delta Air Lines 7,506,000 19.42%
3 Horizon Air 3,445,000 8.92%
4 SkyWest 2,289,000 5.92%
5 Southwest Airlines 2,132,000 5.52%
6 Other Airlines 4,792,000 12.40%

Annual traffic
Annual passenger traffic at SEA airport. See Wikidata query.

Accidents and incidents
  • November 30, 1947: Alaska Airlines Flight 9, a Douglas C-54A en route to Seattle from Anchorage, Alaska, landed in heavy fog and damp conditions after failed attempts at nearby Boeing Field and Paine Field in Everett. Shortly before 2:30 p.m. on Sunday, the plane touched down 2,748 ft (838 m) beyond the approach area to runway 20 and sped onto a nearby road, colliding with an automobile and bursting into flames. Nine fatalities resulted from the accident, including a blind woman riding in the car.[101][102][103]
  • April 2, 1956: Northwest Orient Airlines Flight 2, a Boeing 377 Stratocruiser headed to Portland International Airport in Portland, Oregon and points east, experienced reduced power and extreme buffeting shortly after takeoff from runway 20 due to an improper setting of the airplane's cowl flaps by the flight engineer. Plans were initially made to land at McChord Air Force Base, but the pilot was forced to make a water landing in Puget Sound east of Maury Island. The plane sank within 15 minutes; five of the 38 on board died.[104][105][106]
  • November 24, 1971: Northwest Airlines Flight 305, a Boeing 727 flying to SEA Airport from Portland International Airport, was hijacked by a man calling himself "Dan Cooper", later misidentified by the press as "D. B. Cooper". Cooper released the passengers after landing in exchange for $200,000 and four parachutes, ordered the plane back into the air and jumped out over Southwest Washington with the money.[107] To this day, neither Cooper nor most of the $200,000 have been found.
  • December 26, 1974: Harbor Airlines Flight 308, a Britten Norman Islander bound for Oak Harbor crashed 0.6 miles (1 km) north of SEA Airport in snowy weather conditions into Riverton. Four of the six occupants on board (3 passengers, 1 crew) were killed. Unknown matter in the pitot tubes caused improper readings of the airspeed indicator.[108]
  • January 20, 1983: Northwest Airlines Flight 608, a Boeing 727 flying from SEA Airport to Portland, was hijacked. The man told a flight attendant that he had a bomb and demanded to be taken to Afghanistan. Federal agents stormed the plane after it landed in Portland for refueling. The hijacker was killed and the box he carried revealed no explosives.[109]
  • April 15, 1988: Horizon Air Flight 2658, a twin-engine de Havilland Canada Dash-8 departing for Spokane International Airport, experienced a power loss in the number two engine shortly after takeoff. While the crew lowered the gear for landing as they returned to the airport, a massive fire broke out in the right engine nacelle, resulting in a loss of braking and directional control. After touchdown, the aircraft veered off the runway and crossed the ramp, colliding with two jetways before coming to a stop against a third. The aircraft was destroyed by fire on impact. Four of the 37 passengers were seriously injured, but there were no fatalities.[110][111]
  • August 10, 2018: An empty Horizon Air Bombardier Q400 was stolen by a staff member and ultimately crashed on Ketron Island. Two US Air Force planes tried to force the plane to land.[112]

References
  1. FAA Airport Form 5010 for SEA PDF, effective December 30, 2021.
  2. "Sea–Tac international airport". Port of Seattle. Archived from the original on October 17, 2015. Retrieved October 18, 2015. (official site)
  3. "Mileage Charts: Starting from SeaTac Airport". Washington State Department of Transportation. Archived from the original on December 6, 2018. Retrieved December 5, 2018.
  4. "Sea-Tac airport data at skyvector.com". skyvector.com. Retrieved August 22, 2022.
  5. Bellisle, Martha (August 17, 2015). "Growing pains at Sea–Tac Airport as passenger numbers soar". The Seattle Times. Associated Press. Archived from the original on September 21, 2017. Retrieved September 20, 2017.
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