Seattle (SEA) to Dulles (IAD) flights
3 airlines fly nonstop from Seattle (SEA) to Dulles (IAD): Alaska Airlines, Delta Air Lines and United Airlines. The two airports are 2,300 miles (3,701 km) apart. Alaska Airlines is in oneworld, Delta Air Lines is in SkyTeam and United Airlines is in Star Alliance. There are also 53 ways to fly it with one stop, through Minneapolis, Pittsburgh and Cleveland and more.
Airlines flying nonstop from SEA to IAD
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
- Delta Air LinesSkyTeam · bookable with 8 programsWho books it
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book SEA to IAD 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 Canada AeroplanBooks United Airlines
- Air France-KLM Flying BlueBooks Delta Air Lines
- Air New Zealand AirpointsBooks United Airlines
- Alaska Atmos RewardsBooks Alaska Airlines
- American AAdvantageBooks Alaska Airlines
- ANA Mileage ClubBooks United Airlines
- Avianca LifeMilesBooks United Airlines
- British Airways ClubBooks Alaska Airlines
- Cathay Pacific Asia MilesBooks Alaska Airlines
- China Eastern Eastern MilesBooks Delta Air Lines
- Delta SkyMilesBooks Delta Air Lines
- Emirates SkywardsBooks United Airlines
- EVA Air Infinity MileageLandsBooks United Airlines
- Finnair PlusBooks Alaska Airlines
- Garuda Indonesia GarudaMilesBooks Delta Air Lines
- Iberia ClubBooks Alaska Airlines
- JAL Mileage BankBooks Alaska Airlines
- JetBlue TrueBlueBooks United Airlines
- Korean Air SKYPASSBooks Delta Air Lines
- Lufthansa Miles & MoreBooks United Airlines
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
- SAS EuroBonusBooks Delta Air Lines
- Singapore Airlines KrisFlyerBooks United Airlines
- TAP Miles&GoBooks United Airlines
- Thai Royal Orchid PlusBooks United Airlines
- Turkish Airlines Miles&SmilesBooks United Airlines
- United MileagePlusBooks United Airlines
- Virgin Atlantic Flying ClubBooks Delta Air Lines
SEA to IAD with one stop
53 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Minneapolis (MSP)Delta Air Lines and Sun Country Airlines the whole way
- Via Pittsburgh (PIT)Alaska Airlines and American Airlines, then United Airlines
- Via Cleveland (CLE)Alaska Airlines, then United Airlines
- Via Chicago (ORD)United Airlines the whole way+1
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Columbus (CMH)Alaska Airlines, then United Airlines
- Via Bozeman (BZN)Alaska Airlines and Delta Air Lines, then United Airlines
- Via Indianapolis (IND)Alaska Airlines and American Airlines, then United Airlines
- Via Cincinnati (CVG)Delta Air Lines and Alaska Airlines, then United Airlines
- Via Jackson (JAC)Alaska Airlines, then United Airlines
- Via Calgary (YYC)WestJet the whole way
- Via Saint Louis (STL)Alaska Airlines and Southwest Airlines, then United Airlines
- Via Toronto (YYZ)Air Canada the whole way
- Via Kansas City (MCI)Alaska Airlines, Southwest Airlines and 1 more, then United Airlines
- Via Portland (PDX)Alaska Airlines and Delta Air Lines, then United Airlines
SEA to IAD: common questions
Which airlines fly nonstop from SEA to IAD?
Alaska Airlines (oneworld), Delta Air Lines (SkyTeam) and United Airlines (Star Alliance) fly nonstop from Seattle (SEA) to Dulles (IAD).
How far is Seattle from Dulles by plane?
Seattle (SEA) and Dulles (IAD) are 2,300 miles (3,701 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book SEA to IAD award flights?
30 programs can book at least one of the nonstop airlines: Aeromexico Rewards, Air Canada Aeroplan, Air France-KLM Flying Blue, Air New Zealand Airpoints, Alaska Atmos Rewards, American AAdvantage, ANA Mileage Club, Avianca LifeMiles and 22 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does SEA to IAD cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for SEA to IAD with taxes and fees.
Where can I connect between Seattle and Dulles?
The most direct connections are through Minneapolis (MSP), Pittsburgh (PIT), Cleveland (CLE), Chicago (ORD) and Detroit (DTW). On 21 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.