Philadelphia to Seattle
PHLSEA
Fly from Philadelphia to Seattle starting at USD 92 with Frontier Airlines.
Best fare available on Sep 29, 2026.
Limited seats. Better plans. Book before it's gone.
Philadelphia to Seattle cheapest flights this week
Philadelphia to Seattle monthly flight fare trend
Aug
from USD 139
Sep
from USD 92
Oct
No flights
Nov
No flights
Dec
No flights
Jan
from USD 133
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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