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Cheap flights from Denver (DEN) 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 Denver (DEN) to Seattle (BFI)

How to find the cheapest flight from Denver (DEN) to Seattle (BFI)
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How to find the cheapest flight from Denver (DEN) to Seattle (BFI)
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How to find the cheapest flight from Denver (DEN) to Seattle (BFI)
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Cheap flights from Denver to Seattle in September , October 2026

28 Sep - 20 Oct $ 568.00
DEN
Denver
Frontier Airlines
1 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
1 STOPS
DEN
Denver
Pick dates
28 Sep - 27 Oct $ 584.00
DEN
Denver
Frontier Airlines
1 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
1 STOPS
DEN
Denver
Pick dates
28 Sep - 20 Oct $ 601.00
DEN
Denver
Frontier Airlines
1 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
1 STOPS
DEN
Denver
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Last minute flights from Denver to Seattle

28 Sep - 01 Oct $ 699.00
DEN
Denver
Frontier Airlines
1 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
1 STOPS
DEN
Denver
Pick dates
28 Sep - 01 Oct $ 732.00
DEN
Denver
Frontier Airlines
1 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
1 STOPS
DEN
Denver
Pick dates
27 Sep - 01 Oct $ 737.00
DEN
Denver
Frontier Airlines
1 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
1 STOPS
DEN
Denver
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One-way flights to Seattle from Denver

10:00 AM - 6:45 PM
Air Excursions
1 Stops
10h 35m
DEN - BFI
$ 360
Kiwi
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10:00 AM - 4:05 PM
Air Excursions
1 Stops
7h 55m
DEN - BFI
$ 394
Kiwi
Pick dates
10:00 AM - 4:20 PM
Air Excursions
1 Stops
8h 10m
DEN - BFI
$ 399
Kiwi
Pick dates

How to find the cheapest flight from Denver (DEN) to Seattle (BFI)

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