Earn point on your loyalty program!arrow arc left

Cheap flights from Buffalo (BUF) to Seattle (BFI)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Buffalo (BUF) to Seattle (BFI)

How to find the cheapest flight from Buffalo (BUF) 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 Buffalo (BUF) 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 Buffalo (BUF) 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 Buffalo to Seattle in August , September 2026

28 Aug - 26 Sep $ 1,060.00
BUF
Buffalo
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
BUF
Buffalo
Pick dates
28 Aug - 25 Sep $ 1,061.00
BUF
Buffalo
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
BUF
Buffalo
Pick dates
27 Aug - 26 Sep $ 1,079.00
BUF
Buffalo
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
BUF
Buffalo
Pick dates

Last minute flights from Buffalo to Seattle

28 Aug - 01 Sep $ 1,249.00
BUF
Buffalo
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
BUF
Buffalo
Pick dates
28 Aug - 01 Sep $ 1,311.00
BUF
Buffalo
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
BUF
Buffalo
Pick dates
27 Aug - 01 Sep $ 1,335.00
BUF
Buffalo
Frontier Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
BUF
Buffalo
Pick dates

One-way flights to Seattle from Buffalo

6:54 PM - 9:25 PM
Air Excursions
3 Stops
30h 21m
BUF - BFI
$ 577
Kiwi
Pick dates
9:29 PM - 8:25 PM
Air Excursions
3 Stops
26h 46m
BUF - BFI
$ 653
Kiwi
Pick dates
9:29 PM - 9:25 PM
Air Excursions
3 Stops
27h 46m
BUF - BFI
$ 664
Kiwi
Pick dates

How to find the cheapest flight from Buffalo (BUF) 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 Buffalo (BUF) 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 Buffalo (BUF) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.