Earn point on your loyalty program!arrow arc left

Cheap flights from Boise (BOI) to Seattle (BFI)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Boise (BOI) to Seattle (BFI)

How to find the cheapest flight from Boise (BOI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Boise to Seattle in April , May 2026

16 Apr - 24 May $ 927.00
BOI
Boise
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
BOI
Boise
Pick dates
16 Apr - 31 May $ 951.00
BOI
Boise
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
BOI
Boise
Pick dates
16 Apr - 26 May $ 991.00
BOI
Boise
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
BOI
Boise
Pick dates

One-way flights to Seattle from Boise

3:13 PM - 2:45 PM
Air Excursions
3 Stops
25h 22m
BOI - BFI
$ 533
Kiwi
Pick dates
1:25 PM - 4:05 PM
Air Excursions
3 Stops
28h 30m
BOI - BFI
$ 886
Kiwi
Pick dates
1:25 PM - 6:45 PM
Air Excursions
3 Stops
31h 10m
BOI - BFI
$ 886
Kiwi
Pick dates

How to find the cheapest flight from Boise (BOI) to Seattle (BFI)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boise (BOI) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.