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

Know your dates, get live prices in seconds

Departure

Save up to 31%
Book Flight + Hotel at the same time

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.

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.

Cheap flights from Denver to Seattle in September , October 2026

30 Sep - 27 Oct $ 805.00

DEN

Denver

Frontier Airlines

2 STOPS

BFI

Seattle

BFI

Seattle

Frontier Airlines

1 STOPS

DEN

Denver

Pick dates

30 Sep - 29 Oct $ 842.00

DEN

Denver

Frontier Airlines

2 STOPS

BFI

Seattle

BFI

Seattle

Frontier Airlines

1 STOPS

DEN

Denver

Pick dates

30 Sep - 27 Oct $ 884.00

DEN

Denver

Frontier Airlines

2 STOPS

BFI

Seattle

BFI

Seattle

Frontier Airlines

1 STOPS

DEN

Denver

Pick dates

One-way flights to Seattle from Denver

10:50 PM - 9:25 PM
Air Excursions

2 Stops

24h 25m
DEN - BFI

$ 537
Kiwi

Pick dates

10:50 PM - 4:05 PM
Air Excursions

2 Stops

19h 5m
DEN - BFI

$ 616
Kiwi

Pick dates

How to find the cheapest flight from Denver (DEN) 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 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.