Earn point on your loyalty program!arrow arc left

Cheap flights from Phoenix (PHX) 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 Phoenix (PHX) to Seattle (BFI)

How to find the cheapest flight from Phoenix (PHX) 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 Phoenix (PHX) 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 Phoenix (PHX) 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 Phoenix to Seattle in May , June 2026

28 May - 04 Jun $ 711.00
PHX
Phoenix
Allegiant Air
1 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
1 STOPS
PHX
Phoenix
Pick dates
28 May - 11 Jun $ 714.00
PHX
Phoenix
Allegiant Air
1 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
1 STOPS
PHX
Phoenix
Pick dates
28 May - 25 Jun $ 719.00
PHX
Phoenix
Allegiant Air
1 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
1 STOPS
PHX
Phoenix
Pick dates

Last minute flights from Phoenix to Seattle

28 May - 31 May $ 804.00
PHX
Phoenix
Allegiant Air
1 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
1 STOPS
PHX
Phoenix
Pick dates
21 May - 31 May $ 829.00
PHX
Phoenix
Allegiant Air
1 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
1 STOPS
PHX
Phoenix
Pick dates
14 May - 31 May $ 872.00
PHX
Phoenix
Allegiant Air
1 STOPS
BFI
Seattle
BFI
Seattle
Allegiant Air
1 STOPS
PHX
Phoenix
Pick dates

One-way flights to Seattle from Phoenix

3:33 PM - 6:45 AM
Air Excursions
1 Stops
16h 2m
PHX - BFI
$ 336
Kiwi
Pick dates
3:33 PM - 9:25 PM
Air Excursions
1 Stops
6h 42m
PHX - BFI
$ 368
Kiwi
Pick dates
3:33 PM - 9:25 PM
Air Excursions
1 Stops
6h 42m
PHX - BFI
$ 394
Kiwi
Pick dates

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