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Cheap Flights from Seattle to Boise
SEA → BOI • About 1h 35m nonstop • 3 airlines
Adults
+12 years old
Children
2-11 years old
Infants
Under 2 years
Fares shown are the lowest we have recorded recently on this route and are not a live quote. Run a search above for today's availability, or call (800) 399-8818 and an agent will price it with you.
Flights from Seattle (SEA) to Boise (BOI)
The Seattle to Boise route covers roughly 400 miles and takes about 1h 35m nonstop. 3 airlines compete on it — Alaska Airlines, Southwest Airlines, Delta Air Lines — which keeps fares moving and makes it worth comparing carriers rather than defaulting to the one you usually fly. We have seen one-way fares on this route start around $84.
Boise is one of the fastest-growing cities in the United States, built along a river greenbelt that runs 25 miles through the middle of town.
It is the base for Idaho’s outdoors — whitewater on the Payette, skiing at Bogus Basin 45 minutes up the mountain, and Sun Valley about two and a half hours east.
Airlines flying SEA to BOI
- Alaska Airlines
- Southwest Airlines
- Delta Air Lines
Airports on this route
- Departing: Seattle-Tacoma International Airport (SEA)
- Arriving: Boise Airport (BOI)
Best time to fly to Boise
May through October. Winter is cold but the skiing is close and uncrowded.
Top things to do in Boise
- Boise River Greenbelt
- Idaho State Capitol
- Basque Block
- Bogus Basin
- Sun Valley
- Craters of the Moon
How to save on Seattle to Boise flights
- Shift your departure by one or two days — midweek departures on this route are consistently cheaper than Friday and Sunday.
- Book four to eight weeks ahead. Last-minute fares on SEA to BOI routinely run double the advance price.
- Compare all 3 carriers rather than checking one airline's own site.
- The airport is about 10 minutes from downtown.
- Boise has the largest Basque community in the United States — the Basque Block reflects it.
- Bogus Basin is 45 minutes from downtown, one of the shortest city-to-slope drives anywhere.
About flights from Seattle to Boise
Fares on the SEA to BOI route move with demand, so flexibility is worth more than timing tricks. Shifting your departure by a day or two, flying midweek instead of Friday or Sunday, and booking four to eight weeks ahead all reduce the fare on this route. Our agents also hold consolidator and unpublished fares that do not appear in online results.
Alaska Airlines, Southwest Airlines, Delta Air Lines all operate on this route. Alaska Airlines typically offers the most frequencies, with Southwest Airlines and Delta Air Lines providing competing schedules. Availability varies by season and by which Seattle airport you depart from, so it is worth comparing all carriers before booking.
A nonstop flight takes about 1h 35m. Itineraries with a connection typically add two to four hours depending on the layover city and the length of the stop.
The two cities are roughly 400 miles apart by air.
Departures leave from Seattle-Tacoma International Airport (SEA). Arrivals land at Boise Airport (BOI).
May through October. Winter is cold but the skiing is close and uncrowded.