Baltimore (BWI) to Seattle (SEA) flights
2 airlines fly nonstop from Baltimore (BWI) to Seattle (SEA): Alaska Airlines and Southwest Airlines. The two airports are 2,328 miles (3,747 km) apart. Alaska Airlines is in oneworld. There are also 45 ways to fly it with one stop, through Minneapolis, Cleveland and Milwaukee and more.
Airlines flying nonstop from BWI to SEA
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
- Southwest AirlinesNot in an allianceWho books it
Book BWI to SEA with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Alaska Atmos RewardsBooks Alaska Airlines
- American AAdvantageBooks Alaska Airlines
- British Airways ClubBooks Alaska Airlines
- Cathay Pacific Asia MilesBooks Alaska Airlines
- Finnair PlusBooks Alaska Airlines
- Iberia ClubBooks Alaska Airlines
- JAL Mileage BankBooks Alaska Airlines
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
BWI to SEA with one stop
45 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 Cleveland (CLE)Southwest Airlines, then Alaska Airlines
- Via Milwaukee (MKE)Southwest Airlines, then Alaska Airlines
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Pittsburgh (PIT)Southwest Airlines, then Alaska Airlines and American Airlines
- Via Chicago (ORD)American Airlines and United Airlines the whole way
+1 - Via Chicago (MDW)Southwest Airlines the whole way
- Via Columbus (CMH)Southwest Airlines, then Alaska Airlines
- Via Indianapolis (IND)Southwest Airlines, then Alaska Airlines and American Airlines
- Via Cincinnati (CVG)Southwest Airlines, then Delta Air Lines and Alaska Airlines
- Via Saint Louis (STL)Southwest Airlines the whole way
- Via Kansas City (MCI)Southwest Airlines the whole way
- Via Philadelphia (PHL)Southwest Airlines, then American Airlines, Alaska Airlines and 1 more
- Via Portland (PDX)Alaska Airlines the whole way
- Via Denver (DEN)United Airlines and Southwest Airlines the whole way+3
BWI to SEA: common questions
Which airlines fly nonstop from BWI to SEA?
Alaska Airlines (oneworld) and Southwest Airlines fly nonstop from Baltimore (BWI) to Seattle (SEA).
How far is Baltimore from Seattle by plane?
Baltimore (BWI) and Seattle (SEA) are 2,328 miles (3,747 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book BWI to SEA award flights?
9 programs can book at least one of the nonstop airlines: Alaska Atmos Rewards, American AAdvantage, British Airways Club, Cathay Pacific Asia Miles, Finnair Plus, Iberia Club, JAL Mileage Bank, Qantas Frequent Flyer and 1 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does BWI 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 BWI to SEA with taxes and fees.
Where can I connect between Baltimore and Seattle?
The most direct connections are through Minneapolis (MSP), Cleveland (CLE), Milwaukee (MKE), Detroit (DTW) and Pittsburgh (PIT). On 26 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.