Earn point on your loyalty program!arrow arc left

Cheap flights from Newark (EWR) 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 Newark (EWR) to Seattle (BFI)

How to find the cheapest flight from Newark (EWR) 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 Newark (EWR) 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 Newark (EWR) 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 Newark to Seattle in August , September 2026

31 Aug - 15 Sep $ 776.00
EWR
Newark
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
EWR
Newark
Pick dates
31 Aug - 26 Sep $ 778.00
EWR
Newark
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
EWR
Newark
Pick dates
31 Aug - 29 Sep $ 782.00
EWR
Newark
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
EWR
Newark
Pick dates

Last minute flights from Newark to Seattle

27 Aug - 01 Sep $ 1,119.00
EWR
Newark
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
EWR
Newark
Pick dates
27 Aug - 01 Sep $ 1,190.00
EWR
Newark
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
EWR
Newark
Pick dates
27 Aug - 01 Sep $ 1,216.00
EWR
Newark
Frontier Airlines
3 STOPS
BFI
Seattle
BFI
Seattle
Frontier Airlines
3 STOPS
EWR
Newark
Pick dates

One-way flights to Seattle from Newark

11:30 AM - 9:25 PM
Air Excursions
3 Stops
37h 45m
EWR - BFI
$ 420
Kiwi
Pick dates
7:10 PM - 9:25 PM
Air Excursions
3 Stops
30h 5m
EWR - BFI
$ 450
Kiwi
Pick dates
10:29 PM - 9:25 PM
Air Excursions
3 Stops
26h 46m
EWR - BFI
$ 521
Kiwi
Pick dates

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