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

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1 Adults (11+)
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 August , September 2026

31 Aug - 08 Sep $ 728.00
BOS
Boston
JetBlue Airways
1 STOPS
BFI
Seattle
BFI
Seattle
JetBlue Airways
1 STOPS
BOS
Boston
Pick dates
31 Aug - 04 Sep $ 761.00
BOS
Boston
JetBlue Airways
1 STOPS
BFI
Seattle
BFI
Seattle
JetBlue Airways
1 STOPS
BOS
Boston
Pick dates
31 Aug - 04 Sep $ 761.00
BOS
Boston
JetBlue Airways
1 STOPS
BFI
Seattle
BFI
Seattle
JetBlue Airways
1 STOPS
BOS
Boston
Pick dates

Last minute flights from Boston to Seattle

31 Aug - 31 Aug $ 761.00
BOS
Boston
JetBlue Airways
1 STOPS
BFI
Seattle
BFI
Seattle
JetBlue Airways
1 STOPS
BOS
Boston
Pick dates
30 Aug - 31 Aug $ 871.00
BOS
Boston
JetBlue Airways
1 STOPS
BFI
Seattle
BFI
Seattle
JetBlue Airways
1 STOPS
BOS
Boston
Pick dates
26 Aug - 31 Aug $ 887.00
BOS
Boston
JetBlue Airways
1 STOPS
BFI
Seattle
BFI
Seattle
JetBlue Airways
1 STOPS
BOS
Boston
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One-way flights to Seattle from Boston

9:55 AM - 4:05 PM
Air Excursions
1 Stops
10h
BOS - BFI
$ 381
Kiwi
Pick dates
7:32 PM - 9:25 AM
Air Excursions
1 Stops
17h 43m
BOS - BFI
$ 381
Kiwi
Pick dates
9:55 AM - 4:05 PM
Air Excursions
1 Stops
10h
BOS - BFI
$ 507
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.