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Cheap flights from Boston (BOS) to Seattle (BFI)

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0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from Boston (BOS) to Seattle (BFI)

How to find the cheapest flight from Boston (BOS) to Seattle (BFI)
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How to find the cheapest flight from Boston (BOS) to Seattle (BFI)
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How to find the cheapest flight from Boston (BOS) to Seattle (BFI)
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Cheap flights from Boston to Seattle in November , December 2025

24 Nov - 13 Dec $ 1,175.00
BOS
Boston
Spirit Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Spirit Airlines
3 STOPS
BOS
Boston
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24 Nov - 13 Dec $ 1,231.00
BOS
Boston
Spirit Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Spirit Airlines
3 STOPS
BOS
Boston
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24 Nov - 19 Dec $ 1,289.00
BOS
Boston
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
BOS
Boston
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Last minute flights from Boston to Seattle

24 Nov - 01 Dec $ 1,441.00
BOS
Boston
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
BOS
Boston
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24 Nov - 01 Dec $ 1,497.00
BOS
Boston
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
BOS
Boston
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24 Nov - 01 Dec $ 1,549.00
BOS
Boston
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
BOS
Boston
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One-way flights to Seattle from Boston

11:42 AM - 6:45 AM
Air Excursions
2 Stops
22h 53m
BOS - BFI
$ 698
Kiwi
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9:54 PM - 6:45 PM
Air Excursions
3 Stops
24h 41m
BOS - BFI
$ 811
Kiwi
Pick dates
11:42 AM - 6:45 AM
Air Excursions
2 Stops
22h 53m
BOS - BFI
$ 839
Kiwi
Pick dates

How to find the cheapest flight from Boston (BOS) to Seattle (BFI)

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