Philadelphia to Seattle
PHLSEA
Fly from Philadelphia to Seattle starting at USD 129 with F9.
Best fare available on May 12, 2026.
Limited seats. Better plans. Book before it's gone.
Philadelphia to Seattle cheapest flights this week
12 May
F9
20:35PHL
12:49SEA
1 Stop$129VIEW DEAL
14 May
F9
20:35PHL
12:49SEA
1 Stop$227VIEW DEAL
18 May
F9
20:35PHL
12:49SEA
1 Stop$162VIEW DEAL
4 Jun
F9
20:35PHL
13:06SEA
1 Stop$151VIEW DEAL
Philadelphia to Seattle monthly flight fare trend
May
from USD 129
Jun
from USD 151
Jul
No flights
Aug
No flights
Sep
No flights
Oct
No flights
Airport Details
Origin
Philadelphia
Philadelphia International Airport (PHL)
Philadelphia, PHL
Zone
New York
Elev
36 ft
Destination
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
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