Philadelphia to Seattle
PHLSEA
Fly from Philadelphia to Seattle starting at USD 127 with Frontier Airlines.
Best fare available on Aug 5, 2026.
Limited seats. Better plans. Book before it's gone.
Philadelphia to Seattle cheapest flights this week
Philadelphia to Seattle monthly flight fare trend
Jul
from USD 191
Aug
from USD 127
Sep
No flights
Oct
No flights
Nov
No flights
Dec
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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