117 destinations have scheduled flights from SEA, about 4,050 departures a week. Weekly frequencies come from airline schedules and observed departures, not live status.
| Destination | Flights per week | Airlines | Typical duration |
|---|---|---|---|
| Portland International (PDX) | 194 | Alaska Airlines, Delta Air Lines, American Airlines | — |
| Phoenix (PHX) | 169 | Alaska Airlines, Delta Air Lines, American Airlines, Southwest Airlines Co., Frontier Airlines, Inc. | — |
| Spokane International (GEG) | 159 | Alaska Airlines, Delta Air Lines | — |
| Ted Stevens Anchorage International Airport (ANC) | 157 | Alaska Airlines, Delta Air Lines | — |
| Los Angeles International (LAX) | 157 | Alaska Airlines, Delta Air Lines, United Airlines, SkyWest Airlines, Frontier Airlines, Inc. | — |
| Vancouver International (YVR) | 125 | Alaska Airlines, Delta Air Lines, Air Canada | — |
| San Francisco International (SFO) | 118 | Alaska Airlines, United Airlines, Delta Air Lines | — |
| Denver International (DEN) | 116 | Alaska Airlines, United Airlines, Southwest Airlines Co., Delta Air Lines, Frontier Airlines, Inc. | — |
| Sacramento (SMF) | 112 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co. | — |
| Boise Air Terminal/Gowen Field (BOI) | 111 | Alaska Airlines, Delta Air Lines | — |
| Las Vegas (LAS) | 105 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co., Frontier Airlines, Inc. | — |
| Santa Ana (SNA) | 89 | Alaska Airlines, Delta Air Lines | — |
| San Jose (SJC) | 83 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co. | — |
| Pasco (PSC) | 82 | Alaska Airlines, Delta Air Lines, American Airlines | — |
| San Diego (SAN) | 80 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co. | — |
| Salt Lake City International (SLC) | 78 | Alaska Airlines, Delta Air Lines, American Airlines, Frontier Airlines, Inc. | — |
| Dallas/Fort Worth International (DFW) | 76 | Alaska Airlines, American Airlines, Delta Air Lines | — |
| Fairbanks International Airport (FAI) | 73 | Alaska Airlines, Delta Air Lines | — |
| Eugene (EUG) | 72 | Alaska Airlines, Delta Air Lines, American Airlines | — |
| Chicago O'hare International (ORD) | 64 | American Airlines, United Airlines, Alaska Airlines, China Cargo Airlines, Delta Air Lines | — |
| Rogue Valley International - Medford Airport (MFR) | 51 | Alaska Airlines, Delta Air Lines, American Airlines | — |
| Palm Springs Metropolitan Area (PSP) | 50 | Alaska Airlines, American Airlines, Delta Air Lines | — |
| Gallatin Field (BZN) | 48 | Alaska Airlines, Delta Air Lines | — |
| Roberts Field (RDM) | 47 | Alaska Airlines, Delta Air Lines | — |
| Honolulu International (HNL) | 46 | Alaska Airlines, Delta Air Lines | — |
| Oakland (OAK) | 45 | Alaska Airlines, Southwest Airlines Co., Federal Express | — |
| Bob Hope (BUR) | 44 | Alaska Airlines | — |
| Newark Liberty International (EWR) | 44 | Alaska Airlines, United Airlines | — |
| Ontario International (ONT) | 44 | Alaska Airlines, Delta Air Lines | — |
| Hartsfield-jackson Atlanta International (ATL) | 41 | Delta Air Lines, Alaska Airlines | — |
| Fanning Field (IDA) | 40 | Alaska Airlines, American Airlines | — |
| John F Kennedy International (JFK) | 40 | Alaska Airlines, Delta Air Lines | — |
| Orlando International (MCO) | 36 | Alaska Airlines, Delta Air Lines | — |
| Charlotte Douglas (CLT) | 34 | American Airlines | — |
| Missoula (MSO) | 33 | Alaska Airlines | — |
| Reno (RNO) | 33 | Alaska Airlines | — |
| George Bush Intercontinental (IAH) | 32 | United Airlines, Alaska Airlines | — |
| Logan International (BOS) | 31 | Alaska Airlines, Delta Air Lines | — |
| Pangborn Field (EAT) | 30 | Alaska Airlines | — |
| Washington Dulles International (IAD) | 30 | Alaska Airlines, United Airlines, Delta Air Lines | — |
| Austin-bergstrom International (AUS) | 29 | Alaska Airlines, Delta Air Lines | — |
| Seoul (Incheon) (ICN) | 28 | Alaska Airlines, Delta Air Lines, Korean Air, Asian Air | — |
| Nashville International (BNA) | 27 | Delta Air Lines, Alaska Airlines | — |
| Boundary Bay (JNU) | 27 | Alaska Airlines | — |
| Heathrow (LHR) | 27 | British Airways, Delta Air Lines, Virgin Atlantic | — |
| Minneapolis - St. Paul International (MSP) | 27 | Delta Air Lines, Alaska Airlines, MN Airlines LLC | — |
| Calgary (YYC) | 27 | Alaska Airlines, WestJet, Cargolux S.A. | — |
| Bellingham (BLI) | 26 | Alaska Airlines, United Airlines, Empire Airlines | — |
| Cincinnati/Northern Kentucky (CVG) | 26 | ABX Air, Inc., Alaska Airlines, Delta Air Lines | — |
| Kona International Airport (KOA) | 26 | Alaska Airlines, Delta Air Lines | — |
| Kahului (OGG) | 26 | Alaska Airlines, Delta Air Lines | — |
| Victoria (YYJ) | 26 | Alaska Airlines | — |
| Glacier Park International (FCA) | 25 | Alaska Airlines | — |
| Philadelphia International (PHL) | 24 | American Airlines, Alaska Airlines | — |
| Detroit Metropolitan Wayne County (DTW) | 22 | Delta Air Lines, Alaska Airlines | — |
| Pullman-Moscow Regional Airport (PUW) | 21 | Alaska Airlines | — |
| Kelowna (YLW) | 21 | United Airlines, Alaska Airlines, WestJet | — |
| Fresno Air Terminal Airport (FAT) | 19 | Alaska Airlines | — |
| Helena (HLN) | 19 | Alaska Airlines | — |
| San Luis Obispo (SBP) | 19 | Alaska Airlines | — |
| Walla Walla (ALW) | 18 | Alaska Airlines | — |
| Lihue (LIH) | 18 | Alaska Airlines, Delta Air Lines | — |
| Santa Rosa (STS) | 18 | Alaska Airlines | — |
| Indianapolis International (IND) | 17 | Alaska Airlines | — |
| Redding (RDD) | 16 | Alaska Airlines | — |
| Monterey (MRY) | 15 | Alaska Airlines, American Airlines | — |
| Louis Armstrong New Orléans International Airport (MSY) | 15 | Alaska Airlines | — |
| Billings (BIL) | 14 | Alaska Airlines | — |
| Fort Lauderdale–Hollywood International (FLL) | 14 | Alaska Airlines, Delta Air Lines | — |
| Frankfurt International Airport (FRA) | 14 | Lufthansa Cargo, Condor, CAIRE dba Air Antilles Express | — |
| Haneda Airport (HND) | 14 | Delta Air Lines, All Nippon Airways | — |
| Keflavik International (KEF) | 14 | Icelandair | — |
| Ketchikan International Airport (KTN) | 14 | Alaska Airlines | — |
| Kansas City International Airport (MCI) | 14 | Alaska Airlines, Delta Air Lines | — |
| Narita International Airport (NRT) | 14 | Alaska Airlines, Japan Airlines | — |
| Tampa International (TPA) | 14 | Alaska Airlines, Delta Air Lines | — |
| Yakima (YKM) | 14 | Alaska Airlines | — |
| Schiphol (AMS) | 13 | Delta Air Lines | — |
| Love Field (DAL) | 13 | Southwest Airlines Co. | — |
| Miami International Airport (MIA) | 13 | American Airlines, Linea Aerea Carguera de Colombia S. dba LATAM Cargo Colombia | — |
| Raleigh-durham International Airport (RDU) | 13 | Delta Air Lines, Alaska Airlines | — |
| Tucson (TUS) | 13 | Alaska Airlines | — |
| Albuquerque International (ABQ) | 12 | Alaska Airlines | — |
| Great Falls International Airport (GTF) | 12 | Alaska Airlines, American Airlines | — |
| Lambert-St. Louis International (STL) | 12 | Alaska Airlines | — |
| Sun Valley (SUN) | 12 | Alaska Airlines | — |
| Don Miguel Hidalgo y Costilla International (GDL) | 11 | Volaris | — |
| Charles De Gaulle (CDG) | 10 | Delta Air Lines, Air France | — |
| Santa Barbara Metropolitan Area (SBA) | 10 | Alaska Airlines | — |
| Taipei (TPE) | 10 | Delta Air Lines, EVA Air | — |
| Dublin International (DUB) | 9 | Aer Lingus | — |
| Ronald Reagan Washington National Airport (DCA) | 7 | Alaska Airlines | — |
| Doha International (DOH) | 7 | Qatar Airways | — |
| El Paso International Airport (ELP) | 7 | Alaska Airlines | — |
| Istanbul Airport (IST) | 7 | THY - Turkish Airlines | — |
| Lewiston (LWS) | 7 | Delta Air Lines | — |
| Shanghai Pudong International (PVG) | 7 | Delta Air Lines | — |
| San Bernardino (SBD) | 7 | Air Transport International Inc. | — |
| Dubai (DXB) | 6 | Emirates | — |
| Leonardo Da Vinci (Fiumicino) (FCO) | 6 | Alaska Airlines | — |
| Hopkins International (CLE) | 5 | Alaska Airlines | — |
| Hong Kong International (HKG) | 5 | Cathay Pacific | — |
| Memphis (MEM) | 5 | Federal Express | — |
| Ninoy Aquino International (MNL) | 5 | Philippine Airlines | — |
| Pittsburgh International (PIT) | 5 | Alaska Airlines | — |
| San Antonio (SAT) | 5 | Alaska Airlines | — |
| Franz Josef Strauss (MUC) | 4 | Lufthansa Cargo | — |
| Shreveport (SHV) | 4 | Delta Air Lines | — |
| Baltimore/Washington International Thurgood Marshall (BWI) | 3 | Alaska Airlines | — |
| Eagle County (EGE) | 3 | Alaska Airlines | — |
| General Mitchell International (MKE) | 3 | Alaska Airlines | — |
| Omaha (OMA) | 3 | Alaska Airlines | — |
| Los Cabos (SJD) | 3 | Alaska Airlines | — |
| Fort Myers (RSW) | 2 | Alaska Airlines | — |
| Fairchild International (CLM) | 1 | Empire Airlines | — |
| Friday Harbor (FRD) | 1 | Empire Airlines | — |
| Burlington/Mount Vernon (MVW) | 1 | Empire Airlines | — |
GET /routes returns each scheduled flight from SEA: airline, flight number, departure and arrival time, duration, days of operation and aircraft type.
https://www.goflightlabs.com/routes?access_key=YOUR_ACCESS_KEY&dep_iata=SEA
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