Billings (BIL) to Seattle (SEA) flights
One airline flies nonstop from Billings (BIL) to Seattle (SEA): Alaska Airlines. The two airports are 662 miles (1,065 km) apart. Alaska Airlines is in oneworld. There are also 3 ways to fly it with one stop, through Portland, Salt Lake City and Denver.
Airlines flying nonstop from BIL to SEA
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
Book BIL 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
BIL to SEA with one stop
3 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Portland (PDX)Alaska Airlines the whole way
- Via Salt Lake City (SLC)Delta Air Lines the whole way
- Via Denver (DEN)United Airlines the whole way
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BIL to SEA: common questions
Which airlines fly nonstop from BIL to SEA?
Alaska Airlines (oneworld) flies nonstop from Billings (BIL) to Seattle (SEA).
How far is Billings from Seattle by plane?
Billings (BIL) and Seattle (SEA) are 662 miles (1,065 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book BIL 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 BIL 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 BIL to SEA with taxes and fees.
Where can I connect between Billings and Seattle?
The most direct connections are through Portland (PDX), Salt Lake City (SLC) and Denver (DEN). On 3 of them the same airline flies both flights, for example Alaska Airlines through Portland.
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.