Boston (BOS) to Seattle (SEA) flights
3 airlines fly nonstop from Boston (BOS) to Seattle (SEA): Alaska Airlines, Delta Air Lines and JetBlue Airways. The two airports are 2,488 miles (4,004 km) apart. Alaska Airlines is in oneworld and Delta Air Lines is in SkyTeam. There are also 53 ways to fly it with one stop, through Toronto, Minneapolis and Bozeman and more.
Airlines flying nonstop from BOS to SEA
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
- Delta Air LinesSkyTeam · bookable with 8 programsWho books it
- JetBlue AirwaysNot in an alliance · bookable with 2 programsWho books it
Book BOS 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
- JetBlue TrueBlueBooks JetBlue Airways
- Korean Air SKYPASSBooks Delta Air Lines
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
- SAS EuroBonusBooks Delta Air Lines
- Singapore Airlines KrisFlyerBooks JetBlue Airways
- Virgin Atlantic Flying ClubBooks Delta Air Lines
BOS to SEA with one stop
53 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Toronto (YYZ)Air Canada the whole way
- Via Minneapolis (MSP)Delta Air Lines and Sun Country Airlines the whole way
- Via Bozeman (BZN)Delta Air Lines the whole way
- Via Montreal (YUL)Air Canada the whole way
- Via Calgary (YYC)WestJet the whole way
- Via Milwaukee (MKE)Delta Air Lines, Southwest Airlines and 2 more, then Alaska Airlines
+1 - Via Detroit (DTW)Delta Air Lines the whole way
- Via Cleveland (CLE)JetBlue Airways and Delta Air Lines, then Alaska Airlines
- Via Chicago (ORD)American Airlines, United Airlines and 1 more the whole way
+1
+1 - Via Chicago (MDW)Southwest Airlines the whole way
- Via New York (EWR)United Airlines the whole way
- Via New York (JFK)JetBlue Airways and Delta Air Lines the whole way
- Via Jackson (JAC)United Airlines, then Alaska Airlines
- Via Pittsburgh (PIT)JetBlue Airways and Delta Air Lines, then Alaska Airlines and American Airlines
- Via Vancouver (YVR)JetBlue Airways, then Air Canada, Alaska Airlines and 1 more
BOS to SEA: common questions
Which airlines fly nonstop from BOS to SEA?
Alaska Airlines (oneworld), Delta Air Lines (SkyTeam) and JetBlue Airways fly nonstop from Boston (BOS) to Seattle (SEA).
How far is Boston from Seattle by plane?
Boston (BOS) and Seattle (SEA) are 2,488 miles (4,004 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book BOS to SEA award flights?
19 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 11 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does BOS 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 BOS to SEA with taxes and fees.
Where can I connect between Boston and Seattle?
The most direct connections are through Toronto (YYZ), Minneapolis (MSP), Bozeman (BZN), Montreal (YUL) and Calgary (YYC). On 41 of them the same airline flies both flights, for example Air Canada through Toronto.
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.