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Cheap flights from Philadelphia (PHL) to Seattle (BFI)

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How to find the cheapest flight from Philadelphia (PHL) to Seattle (BFI)

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

25 Nov - 18 Dec $ 1,181.00
PHL
Philadelphia
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
PHL
Philadelphia
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25 Nov - 14 Dec $ 1,193.00
PHL
Philadelphia
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
PHL
Philadelphia
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25 Nov - 05 Dec $ 1,194.00
PHL
Philadelphia
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
PHL
Philadelphia
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Last minute flights from Philadelphia to Seattle

25 Nov - 01 Dec $ 1,394.00
PHL
Philadelphia
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
PHL
Philadelphia
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24 Nov - 01 Dec $ 1,427.00
PHL
Philadelphia
Sun Country Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
PHL
Philadelphia
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25 Nov - 01 Dec $ 1,451.00
PHL
Philadelphia
Sun Country Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Sun Country Airlines
2 STOPS
PHL
Philadelphia
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One-way flights to Seattle from Philadelphia

4:14 PM - 2:45 PM
Air Excursions
3 Stops
26h 21m
PHL - BFI
$ 654
Kiwi
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6:41 PM - 2:45 PM
Air Excursions
3 Stops
23h 54m
PHL - BFI
$ 674
Kiwi
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12:18 PM - 5:35 AM
Air Excursions
2 Stops
21h 7m
PHL - BFI
$ 697
Kiwi
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How to find the cheapest flight from Philadelphia (PHL) to Seattle (BFI)

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