Washington (DCA) to Seattle (SEA) flights
2 airlines fly nonstop from Washington (DCA) to Seattle (SEA): Alaska Airlines and Delta Air Lines. The two airports are 2,322 miles (3,737 km) apart. Alaska Airlines is in oneworld and Delta Air Lines is in SkyTeam. There are also 48 ways to fly it with one stop, through Milwaukee, Minneapolis and Pittsburgh and more.
Airlines flying nonstop from DCA to SEA
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
- Delta Air LinesSkyTeam · bookable with 8 programsWho books it
Book DCA to SEA with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Aeromexico RewardsBooks Delta Air Lines
- Air France-KLM Flying BlueBooks Delta Air Lines
- Alaska Atmos RewardsBooks Alaska Airlines
- American AAdvantageBooks Alaska Airlines
- British Airways ClubBooks Alaska Airlines
- Cathay Pacific Asia MilesBooks Alaska Airlines
- China Eastern Eastern MilesBooks Delta Air Lines
- Delta SkyMilesBooks Delta Air Lines
- Finnair PlusBooks Alaska Airlines
- Garuda Indonesia GarudaMilesBooks Delta Air Lines
- Iberia ClubBooks Alaska Airlines
- JAL Mileage BankBooks Alaska Airlines
- Korean Air SKYPASSBooks Delta Air Lines
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
- SAS EuroBonusBooks Delta Air Lines
- Virgin Atlantic Flying ClubBooks Delta Air Lines
DCA to SEA with one stop
48 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Milwaukee (MKE)Southwest Airlines and American Airlines, then Alaska Airlines
- Via Minneapolis (MSP)Delta Air Lines the whole way
- Via Pittsburgh (PIT)American Airlines the whole way
- Via Cleveland (CLE)American Airlines, then Alaska Airlines
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Chicago (ORD)American Airlines and United Airlines the whole way
+1 - Via Chicago (MDW)Southwest Airlines the whole way
- Via Columbus (CMH)American Airlines and Southwest Airlines, then Alaska Airlines
- Via Cedar Rapids (CID)American Airlines the whole way
- Via Indianapolis (IND)American Airlines the whole way
- Via Cincinnati (CVG)Delta Air Lines the whole way
- Via Omaha (OMA)Delta Air Lines and Southwest Airlines, then Alaska Airlines
- Via Toronto (YYZ)Air Canada the whole way
- Via Saint Louis (STL)Southwest Airlines the whole way
- Via Kansas City (MCI)Southwest Airlines the whole way
DCA to SEA: common questions
Which airlines fly nonstop from DCA to SEA?
Alaska Airlines (oneworld) and Delta Air Lines (SkyTeam) fly nonstop from Washington (DCA) to Seattle (SEA).
How far is Washington from Seattle by plane?
Washington (DCA) and Seattle (SEA) are 2,322 miles (3,737 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book DCA to SEA award flights?
17 programs can book at least one of the nonstop airlines: Aeromexico Rewards, Air France-KLM Flying Blue, Alaska Atmos Rewards, American AAdvantage, British Airways Club, Cathay Pacific Asia Miles, China Eastern Eastern Miles, Delta SkyMiles and 9 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does DCA to SEA cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for DCA to SEA with taxes and fees.
Where can I connect between Washington and Seattle?
The most direct connections are through Milwaukee (MKE), Minneapolis (MSP), Pittsburgh (PIT), Cleveland (CLE) and Detroit (DTW). On 35 of them the same airline flies both flights, for example Delta Air Lines through Minneapolis.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.