Alaska · SEA
What gates does Alaska use at Seattle Airport (SEA)?
Alaska uses 64 gates at Seattle Airport (SEA), mainly in Concourses C, N and D, with about 309 departures a day (Oct 1–21, 2026). It is the main airline at 45 of them. By departures: Concourses C (43% of its departures), N (36%) and D (17%).
Based on 10,934 Alaska flights at SEA, Oct 1–21, 2026 (full days)
How Alaska compares at SEA
- 1st of the 34 airlines with regular flights at SEA by departures: 53% of them (309 departures a day of about 587 a day).
- 53% of the seats leaving SEA: about 45,058 a day, 146 per departure.
- 4.2 turns a day at each gate it turns planes at, about the same as the airport’s 4.5.
- Median turn at the gate: 75 min, the same as the airport median (75 min).
- 28% of its departures are regional jets, against 28% across SEA.
- At SEA, Alaska’s 309 departures a day compare with Delta’s 159 and United’s 30. Alaska has 45 gates of its own; Delta 22; United 5.
Where Alaska flies nonstop from SEA
108 nonstop destinations. Nonstop routes seen Oct 1–21, 2026; a few days of data can miss weekly or seasonal routes.
| Destination | Flights | Other airlines on this route |
|---|---|---|
| AnchorageANC | 14/day | Delta (4-5/day) |
| Portland, ORPDX | 12/day | Delta (7-8/day) |
| SpokaneGEG | 9-10/day | Delta (7-8/day) |
| Los AngelesLAX | 9/day | Delta (6-7/day), United (3-4/day), American (3/day), Frontier (1/day) |
| Las VegasLAS | 8-9/day | Delta (4-5/day), Southwest (2-3/day), Frontier (4-5/week), United (under 1/week), American (under 1/week) |
| San FranciscoSFO | 8-9/day | United (7/day), Delta (5/day) |
| San DiegoSAN | 8-9/day | Delta (4-5/day), Southwest (2/day) |
| BoiseBOI | 8/day | Delta (6-7/day) |
| PhoenixPHX | 7-8/day | Delta (5/day), American (3-4/day), Southwest (3/day) |
| Orange CountySNA | 6-7/day | Delta (3-4/day) |
| VancouverYVR | 6/day | Delta (5-6/day), Air Canada (3-4/day) |
| HonoluluHNL | 6/day | Delta (2/day) |
| Eugene, OREUG | 5-6/day | Delta (3/day) |
| San JoseSJC | 5-6/day | Delta (4-5/day), Southwest (2-3/day), United (under 1/week) |
| Redmond/BendRDM | 5/day | Delta (3/day) |
| Dallas/Fort WorthDFW | 4-5/day | American (7-8/day), Delta (2/day) |
| Salt Lake CitySLC | 4-5/day | Delta (6-7/day), United (under 1/week) |
| Chicago O'HareORD | 4-5/day | United (5/day), American (4-5/day), Delta (3/day) |
| BurbankBUR | 4-5/day | none seen |
| SacramentoSMF | 4-5/day | Delta (4-5/day), Southwest (3/day) |
| DenverDEN | 4-5/day | United (5-6/day), Southwest (3-4/day), Delta (3/day), Frontier (1/day), American (under 1/week) |
| FairbanksFAI | 4/day | Delta (1-2/day) |
| Pasco, WAPSC | 4/day | Delta (3/day) |
| BostonBOS | 4/day | Delta (3-4/day), JetBlue (1/day) |
| Kahului (Maui)OGG | 4/day | Delta (1/day) |
| Medford, ORMFR | 3-4/day | Delta (3/day) |
| Palm SpringsPSP | 3-4/day | none seen |
| New York JFKJFK | 3-4/day | Delta (4/day), JetBlue (1/day) |
| BozemanBZN | 3-4/day | Delta (2/day) |
| KetchikanKTN | 3-4/day | none seen |
| Ontario, CAONT | 3-4/day | Delta (2-3/day), Frontier (4-5/week) |
| JuneauJNU | 3-4/day | Delta (1-2/week) |
| OaklandOAK | 3/day | Southwest (2-3/day) |
| Kalispell, MTFCA | 3/day | none seen |
| MissoulaMSO | 3/day | none seen |
| Pullman, WAPUW | 3/day | none seen |
| RenoRNO | 3/day | none seen |
| AtlantaATL | 3/day | Delta (7/day) |
| AustinAUS | 3/day | Delta (2-3/day), Southwest (1/day) |
| Billings, MTBIL | 3/day | Delta (under 1/week) |
| FresnoFAT | 3/day | none seen |
| NewarkEWR | 3/day | United (2-3/day) |
| OrlandoMCO | 3/day | Delta (2/day) |
| Victoria, BCYYJ | 3/day | none seen |
| Bellingham, WABLI | 3/day | EM (5-6/week) |
| Minneapolis/St. PaulMSP | 2-3/day | Delta (5/day), Sun Country (4-5/week), United (under 1/week) |
| Washington DullesIAD | 2-3/day | United (2/day), Delta (6-7/week) |
| St. LouisSTL | 2/day | none seen |
| CalgaryYYC | 2/day | WestJet (2/day) |
| NashvilleBNA | 2/day | Delta (1/day) |
| AlbuquerqueABQ | 2/day | Delta (2-3/week) |
| DetroitDTW | 2/day | Delta (4/day) |
| HoustonIAH | 2/day | United (4/day) |
| Idaho FallsIDA | 2/day | none seen |
| Kansas CityMCI | 2/day | Delta (1/day) |
| KonaKOA | 2/day | Delta (1/day) |
| Lihue (Kauai)LIH | 2/day | Delta (1/day) |
| Long BeachLGB | 2/day | Southwest (5-6/week) |
| PhiladelphiaPHL | 2/day | American (2-3/day), Delta (1/day) |
| San Luis ObispoSBP | 2/day | none seen |
| Santa BarbaraSBA | 2/day | none seen |
| Santa RosaSTS | 2/day | none seen |
| Walla Walla, WAALW | 2/day | none seen |
| Washington NationalDCA | 2/day | Delta (1/day) |
| Wenatchee, WAEAT | 2/day | none seen |
| YakimaYKM | 2/day | none seen |
| BaltimoreBWI | 1-2/day | none seen |
| IndianapolisIND | 1-2/day | none seen |
| TucsonTUS | 1-2/day | Delta (1/day) |
| EdmontonYEG | 1-2/day | Delta (under 1/week) |
| CincinnatiCVG | 1/day | Delta (1/day) |
| ClevelandCLE | 1/day | none seen |
| Columbus, OHCMH | 1/day | none seen |
| PittsburghPIT | 1/day | none seen |
| San AntonioSAT | 1/day | none seen |
| Charleston, SCCHS | 1/day | none seen |
| Oklahoma CityOKC | 1/day | none seen |
| TampaTPA | 1/day | Delta (6-7/week) |
| Arcata/Eureka, CAACV | 1/day | none seen |
| El PasoELP | 1/day | Delta (under 1/week) |
| Fort LauderdaleFLL | 1/day | Delta (1/day) |
| Great Falls, MTGTF | 1/day | none seen |
| Helena, MTHLN | 1/day | none seen |
| KelownaYLW | 1/day | none seen |
| London HeathrowLHR | 1/day | British Airways (2/day), Delta (1/day), Virgin Atlantic (1/day) |
| Los CabosSJD | 1/day | none seen |
| MiamiMIA | 1/day | American (1/day), Delta (1/day) |
| MilwaukeeMKE | 1/day | none seen |
| MontereyMRY | 1/day | none seen |
| New OrleansMSY | 1/day | none seen |
| OmahaOMA | 1/day | none seen |
| Raleigh/DurhamRDU | 1/day | Delta (1/day) |
| Redding, CARDD | 1/day | none seen |
| Sun ValleySUN | 1/day | none seen |
| Tokyo NaritaNRT | 1/day | Japan Airlines (1/day) |
| TorontoYYZ | 1/day | Air Canada (6-7/week) |
| TulsaTUL | 1/day | none seen |
| WichitaICT | 1/day | none seen |
| RomeFCO | 6/week | Delta (4/week) |
| Puerto VallartaPVR | 5-6/week | none seen |
| SeoulICN | 5-6/week | Korean Air (1-2/day), Delta (1/day), Asiana (2-3/week) |
| GreensboroGSO | 2-3/week | none seen |
| Everett, WAPAE | 1-2/week | none seen |
| SeattleSEA | 1-2/week | Delta (under 1/week) |
| Jackson HoleJAC | under 1/week | none seen |
| Petersburg, AKPSG | under 1/week | none seen |
| Seattle Boeing FieldBFI | under 1/week | none seen |
| WinnipegYWG | under 1/week | none seen |
When Alaska flies at SEA
- First departure of the day usually around 6:05 am, the last around 12:30 am (after midnight).
- Busiest hour: 8:00 am–9:00 am, with about 46 of its arrivals and departures.
- About 39 of its aircraft spend the night at SEA (arrive in the evening, leave the next morning).
Alaska’s aircraft at SEA
| Aircraft | Departures | Seats each |
|---|---|---|
| E175 | 85/day | 76 |
| 737-900 | 71/day | 178 |
| 737 MAX 9 | 64/day | 178 |
| 737-800 | 50/day | 159 |
| 737 MAX 8 | 16/day | 159 |
| 737-700 | 14/day | 124 |
| A330-200 | 3-4/day | 278 |
| 787-9 | 3-4/day | 300 |
| A321neo | under 1/week | 189 |
| E170 | under 1/week | not listed |
About 45,058 seats leave SEA on Alaska each day. Of the gates it holds, 2 have taken a wide-body, 40 have taken a narrow-body and 3 only regional jets. Seats are capacity from each airline’s seat map per aircraft type, not passengers.
Alaska’s gates at SEA
Concourse D D1, D2, D3, D4, D6, D7, D8, D20, D21, D22, D23, D25
Concourse N N1, N2, N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N13, N14, N15, N16, N17, N18, N19, N20
Concourse C C2, C3, C9, C10, C10C, C10E, C11, C15, C16, C16C, C17, C18, C20
Held = the airline flying the gate most (regional partners count as their brand).
Gates it shares
| Gate | Who holds it | Other airlines there |
|---|---|---|
| S1 | Common use | Delta, Air Canada, Frontier, Volaris |
| S2 | Common use | Delta, American, Volaris, Icelandair |
| S3 | Common use | Delta, United, Volaris, JetBlue |
| S4 | Common use | Delta, Icelandair, United, JetBlue |
| S5 | Common use | Delta, Air Canada, United, Aeroméxico |
| A6 | Held by Delta | Delta, Air Canada, United |
| A7 | Common use | Delta, United, Air Canada, American |
| S7 | Common use | Delta, Japan Airlines, Virgin Atlantic, United |
| A8 | Common use | Delta, Lufthansa, United, Korean Air |
| S8 | Common use | Delta, Lufthansa, ANA, Japan Airlines |
| S9 | Common use | Delta, British Airways, Condor, United |
| S9A | Common use | Delta, United, Southwest, American |
| A10 | Common use | Delta, China Airlines, Air France, Condor |
| S10 | Common use | British Airways, Delta, Qatar Airways, Turkish Airlines |
| S11 | Common use | Delta, Lufthansa, STARLUX, British Airways |
| S12 | Common use | Delta, EVA Air, Korean Air, British Airways |
| S15 | Common use | Delta, Emirates, EVA Air, Icelandair |
| D24 | Common use | Frontier, WestJet |
| D26 | Common use | American, WestJet, Frontier, Air Canada |
About this data
Based on 16 full days of flights at SEA, Oct 1–21, 2026. Gates of its own are the gates where Alaska flies the most (regional partners count as their brand). Every one of its departures has a seat count.
Alaska at SEA: questions
What terminal is Alaska at Seattle Airport (SEA)?
Alaska flies from Concourses C, N and D at Seattle Airport (SEA). By departures: Concourses C (43% of its departures), N (36%) and D (17%).
What gates does Alaska use at SEA?
Alaska has 45 gates at SEA (the airline flying each one most): C10, C10C, C10E, C11, C15, C16, C16C, C17, C18, C2, C20, C3 and 33 more. It used 64 gates in all over Oct 1–21, 2026.
How many flights a day does Alaska have from SEA?
About 309 departures a day and 45,058 seats, averaged over Oct 1–21, 2026.
Where does Alaska fly nonstop from SEA?
Alaska flies nonstop to 108 cities from SEA, the most often to Anchorage, Portland, OR, Spokane, Los Angeles, San Francisco and Las Vegas. Routes seen Oct 1–21, 2026.
When is Alaska’s first flight out of SEA?
Usually around 6:05 am; the last leaves around 12:30 am (after midnight).
Does Alaska share gates at SEA?
Yes: 19 gates it uses are shared or used most by another airline, e.g. gate S1 with Delta, Air Canada, Frontier and Volaris.
Other airlines at SEA
All of SEA’s gates by airline · Alaska at every airport we map · Nonstop routes from SEA