Earn point on your loyalty program!arrow arc left

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

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 Seattle (BFI) to Philadelphia (PHL)

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

Cheap flights from Seattle to Philadelphia in April , May 2026

28 Apr - 03 May $ 709.00
BFI
Seattle
Air Excursions
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Air Excursions
2 STOPS
BFI
Seattle
Pick dates
28 Apr - 14 May $ 748.00
BFI
Seattle
Air Excursions
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Air Excursions
3 STOPS
BFI
Seattle
Pick dates
28 Apr - 04 May $ 785.00
BFI
Seattle
Air Excursions
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Air Excursions
2 STOPS
BFI
Seattle
Pick dates

Last minute flights from Seattle to Philadelphia

28 Apr - 01 May $ 726.00
BFI
Seattle
Air Excursions
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Air Excursions
2 STOPS
BFI
Seattle
Pick dates
27 Apr - 01 May $ 826.00
BFI
Seattle
Air Excursions
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Air Excursions
2 STOPS
BFI
Seattle
Pick dates
24 Apr - 01 May $ 833.00
BFI
Seattle
Air Excursions
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Air Excursions
2 STOPS
BFI
Seattle
Pick dates

One-way flights to Philadelphia from Seattle

8:05 AM - 11:59 PM
Frontier Airlines
2 Stops
18h 29m
BFI - PHL
$ 312
Kiwi
Pick dates
8:05 AM - 11:59 PM
Frontier Airlines
2 Stops
18h 29m
BFI - PHL
$ 412
Kiwi
Pick dates
8:05 AM - 11:59 PM
Frontier Airlines
2 Stops
18h 29m
BFI - PHL
$ 419
Kiwi
Pick dates

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

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 Seattle (BFI) to Philadelphia (PHL)
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 Seattle (BFI) to Philadelphia (PHL)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.