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Cheap flights from San Diego (SAN) 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 San Diego (SAN) to Seattle (BFI)

How to find the cheapest flight from San Diego (SAN) to Seattle (BFI)
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How to find the cheapest flight from San Diego (SAN) to Seattle (BFI)
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How to find the cheapest flight from San Diego (SAN) to Seattle (BFI)
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Cheap flights from San Diego to Seattle in December 2025 , January 2026

30 Dec - 16 Jan $ 877.00
SAN
San Diego
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
SAN
San Diego
Pick dates
30 Dec - 15 Jan $ 890.00
SAN
San Diego
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
SAN
San Diego
Pick dates
30 Dec - 16 Jan $ 938.00
SAN
San Diego
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
SAN
San Diego
Pick dates

Last minute flights from San Diego to Seattle

29 Dec - 01 Jan $ 1,036.00
SAN
San Diego
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
SAN
San Diego
Pick dates
23 Dec - 01 Jan $ 1,066.00
SAN
San Diego
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
SAN
San Diego
Pick dates
22 Dec - 01 Jan $ 1,066.00
SAN
San Diego
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
2 STOPS
SAN
San Diego
Pick dates

One-way flights to Seattle from San Diego

9:14 PM - 5:25 PM
Air Excursions
2 Stops
21h 1m
SAN - BFI
$ 503
Kiwi
Pick dates
7:21 PM - 4:05 PM
Air Excursions
2 Stops
21h 34m
SAN - BFI
$ 574
Kiwi
Pick dates
9:14 PM - 5:25 PM
Air Excursions
2 Stops
21h 1m
SAN - BFI
$ 596
Kiwi
Pick dates

How to find the cheapest flight from San Diego (SAN) to Seattle (BFI)

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