106 destinations have scheduled flights from SEA, about 1,930 departures a week. Weekly frequencies come from airline schedules and observed departures, not live status.
| Destination | Flights per week | Airlines | Typical duration |
|---|---|---|---|
| Los Angeles International Airport (LAX) | 77 | Alaska Airlines, Delta Air Lines, Albatross Airlines, SkyWest Airlines, American Airlines | — |
| San Francisco International Airport (SFO) | 76 | Alaska Airlines, Albatross Airlines, Delta Air Lines | — |
| Phoenix Sky Harbor International Airport (PHX) | 74 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co., American Airlines, Envoy Air Inc. | — |
| Portland International Airport (PDX) | 65 | Alaska Airlines, Delta Air Lines | — |
| Denver International Airport (DEN) | 63 | Alaska Airlines, Albatross Airlines, Delta Air Lines, Air Transport International Inc., Frontier Airlines, Inc. | — |
| Ted Stevens Anchorage International Airport (ANC) | 57 | Alaska Airlines, Delta Air Lines | — |
| Vancouver International Airport (YVR) | 57 | Alaska Airlines, Delta Air Lines, Air Canada | — |
| Boise Air Terminal/Gowen Field (BOI) | 56 | Alaska Airlines, Delta Air Lines | — |
| Spokane International Airport (GEG) | 56 | Alaska Airlines, Delta Air Lines | — |
| Harry Reid International Airport (LAS) | 54 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co. | — |
| San Diego International Airport (SAN) | 50 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co. | — |
| Sacramento International Airport (SMF) | 47 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co. | — |
| Dallas Fort Worth International Airport (DFW) | 45 | Alaska Airlines, American Airlines, Delta Air Lines | — |
| Mineta San Jose International Airport (SJC) | 43 | Alaska Airlines, Delta Air Lines, Southwest Airlines Co. | — |
| Chicago O'Hare International Airport (ORD) | 42 | American Airlines, Alaska Airlines, Albatross Airlines, Delta Air Lines | — |
| Tri Cities Airport (PSC) | 36 | Alaska Airlines, Delta Air Lines | — |
| John Wayne Orange County International Airport (SNA) | 36 | Alaska Airlines, Delta Air Lines | — |
| Eugene Airport (EUG) | 27 | Alaska Airlines, Delta Air Lines | — |
| Washington Dulles International Airport (IAD) | 26 | Alaska Airlines, Albatross Airlines, Delta Air Lines | — |
| John F. Kennedy International Airport (JFK) | 26 | Delta Air Lines, Alaska Airlines | — |
| Rogue Valley International-Medford Airport (MFR) | 26 | Alaska Airlines, Delta Air Lines | — |
| Salt Lake City International Airport (SLC) | 26 | Delta Air Lines, Alaska Airlines | — |
| Hartsfield Jackson Atlanta International Airport (ATL) | 24 | Delta Air Lines, Alaska Airlines | — |
| Daniel K. Inouye International Airport (HNL) | 24 | Alaska Airlines, Delta Air Lines | — |
| London Heathrow Airport (LHR) | 23 | British Airways, Intercontinental Airlines, Delta Air Lines | — |
| Ontario International Airport (ONT) | 23 | Alaska Airlines, Delta Air Lines | — |
| Fairbanks International Airport (FAI) | 22 | Alaska Airlines, Delta Air Lines | — |
| Boston Logan International Airport (BOS) | 21 | Alaska Airlines, Delta Air Lines | — |
| Bozeman Yellowstone International Airport (BZN) | 21 | Alaska Airlines, Delta Air Lines | — |
| Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP) | 20 | Delta Air Lines, Alaska Airlines, MN Airlines LLC | — |
| Newark Liberty International Airport (EWR) | 19 | Alaska Airlines, Albatross Airlines | — |
| Oakland San Francisco Bay Airport (OAK) | 18 | Alaska Airlines, Southwest Airlines Co., Four Island Air | — |
| Kahului International Airport (OGG) | 18 | Alaska Airlines, Delta Air Lines | — |
| Incheon International Airport (ICN) | 17 | Delta Air Lines, Korean Air, Alaska Airlines | — |
| Palm Springs International Airport (PSP) | 17 | Alaska Airlines, American Airlines | — |
| Roberts Field (RDM) | 17 | Delta Air Lines, Alaska Airlines | — |
| Orlando International Airport (MCO) | 16 | Alaska Airlines, Delta Air Lines | — |
| Pullman-Moscow Regional Airport (PUW) | 16 | Alaska Airlines | — |
| Austin Bergstrom International Airport (AUS) | 15 | Alaska Airlines, Delta Air Lines | — |
| Hollywood Burbank/Bob Hope Airport (BUR) | 15 | Alaska Airlines | — |
| Philadelphia International Airport (PHL) | 15 | American Airlines, Alaska Airlines | — |
| Reno Tahoe International Airport (RNO) | 15 | Alaska Airlines | — |
| Cincinnati Northern Kentucky International Airport (CVG) | 13 | Great Barrier Airlines, Delta Air Lines | — |
| Amsterdam Airport Schiphol (AMS) | 12 | Delta Air Lines | — |
| Nashville International Airport (BNA) | 12 | Alaska Airlines, Delta Air Lines | — |
| Detroit Metropolitan Wayne County Airport (DTW) | 12 | Delta Air Lines, Alaska Airlines | — |
| Frankfurt Main Airport (FRA) | 12 | Condor, Lufthansa Cargo | — |
| Tokyo Haneda International Airport (HND) | 12 | Delta Air Lines, All Nippon Airways | — |
| Idaho Falls Regional Airport (IDA) | 12 | Alaska Airlines | — |
| Keflavik International Airport (KEF) | 12 | Icelandair | — |
| Ellison Onizuka Kona International Airport at Keāhole (KOA) | 12 | Alaska Airlines, Delta Air Lines | — |
| Ketchikan International Airport (KTN) | 12 | Alaska Airlines | — |
| Lihue Airport (LIH) | 12 | Alaska Airlines, Delta Air Lines | — |
| Missoula Montana Airport (MSO) | 12 | Alaska Airlines | — |
| Narita International Airport (NRT) | 12 | Alaska Airlines, Japan Airlines | — |
| Calgary International Airport (YYC) | 12 | Alaska Airlines, African International Airways | — |
| Walla Walla Regional Airport (ALW) | 11 | Alaska Airlines | — |
| Charlotte Douglas International Airport (CLT) | 11 | American Airlines | — |
| Glacier Park International Airport (FCA) | 11 | Alaska Airlines | — |
| George Bush Intercontinental Airport (IAH) | 11 | Albatross Airlines, Alaska Airlines | — |
| Kansas City International Airport (MCI) | 11 | Alaska Airlines, Delta Air Lines | — |
| Raleigh-Durham International Airport (RDU) | 11 | Delta Air Lines, Alaska Airlines | — |
| Yakima Air Terminal McAllister Field (YKM) | 11 | Alaska Airlines | — |
| Victoria International Airport (YYJ) | 11 | Alaska Airlines | — |
| Pangborn Memorial Airport (EAT) | 10 | Alaska Airlines | — |
| Fresno Yosemite International Airport (FAT) | 10 | Alaska Airlines | — |
| Tampa International Airport (TPA) | 10 | Delta Air Lines, Alaska Airlines | — |
| Charles de Gaulle International Airport (CDG) | 9 | Delta Air Lines, Air France | — |
| Juneau International Airport (JNU) | 9 | Alaska Airlines | — |
| Albuquerque International Sunport (ABQ) | 7 | Alaska Airlines | — |
| Billings Logan International Airport (BIL) | 6 | Alaska Airlines | — |
| Dallas Love Field (DAL) | 6 | Southwest Airlines Co. | — |
| Ronald Reagan Washington National Airport (DCA) | 6 | Alaska Airlines | — |
| El Paso International Airport (ELP) | 6 | Alaska Airlines | — |
| Rome–Fiumicino Leonardo da Vinci International Airport (FCO) | 6 | Alaska Airlines | — |
| Fort Lauderdale Hollywood International Airport (FLL) | 6 | Delta Air Lines | — |
| Great Falls International Airport (GTF) | 6 | Alaska Airlines | — |
| Helena Regional Airport (HLN) | 6 | Alaska Airlines | — |
| İstanbul Airport (IST) | 6 | THY - Turkish Airlines | — |
| Lewiston Nez Perce County Airport (LWS) | 6 | Delta Air Lines | — |
| Shanghai Pudong International Airport (PVG) | 6 | Delta Air Lines | — |
| Santa Barbara Municipal Airport (SBA) | 6 | Alaska Airlines | — |
| San Bernardino International Airport (SBD) | 6 | Air Transport International Inc. | — |
| San Luis County Regional Airport (SBP) | 6 | Alaska Airlines | — |
| St. Louis Lambert International Airport (STL) | 6 | Alaska Airlines | — |
| Taiwan Taoyuan International Airport (TPE) | 6 | Delta Air Lines | — |
| Tucson International Airport (TUS) | 6 | Alaska Airlines | — |
| Bellingham International Airport (BLI) | 5 | Alaska Airlines | — |
| Guadalajara International Airport (GDL) | 5 | Volaris | — |
| Hong Kong International Airport (HKG) | 5 | Cathay Pacific | — |
| Indianapolis International Airport (IND) | 5 | Alaska Airlines | — |
| Miami International Airport (MIA) | 5 | American Airlines | — |
| Louis Armstrong New Orleans International Airport (MSY) | 5 | Alaska Airlines | — |
| Hamad International Airport (DOH) | 4 | Qatar Airways | — |
| Dublin Airport (DUB) | 4 | Aer Lingus | — |
| Dubai International Airport (DXB) | 4 | Emirates | — |
| Frederick W. Smith International Airport (MEM) | 4 | Four Island Air | — |
| Charles M. Schulz Sonoma County Airport (STS) | 4 | Alaska Airlines | — |
| Kelowna International Airport (YLW) | 4 | Albatross Airlines | — |
| Baltimore/Washington International Thurgood Marshall Airport (BWI) | 3 | Alaska Airlines | — |
| General Mitchell International Airport (MKE) | 3 | Alaska Airlines | — |
| Ninoy Aquino International Airport (MNL) | 3 | Philippine Airlines | — |
| Monterey Regional Airport (MRY) | 3 | American Airlines | — |
| Munich Airport (MUC) | 3 | Lufthansa Cargo | — |
| Eppley Airfield (OMA) | 3 | Alaska Airlines | — |
| Los Cabos International Airport (SJD) | 3 | Alaska Airlines | — |
GET /routes returns each scheduled flight from SEA: airline, flight number, departure and arrival time, duration, days of operation and aircraft type.
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