Seattle to Philadelphia
SEAPHL
Fly from Seattle to Philadelphia starting at USD 185 with Southwest Airlines.
Best fare available on Dec 7, 2026.
Limited seats. Better plans. Book before it's gone.
Seattle to Philadelphia cheapest flights this week
Seattle to Philadelphia monthly flight fare trend
Oct
from USD 231
Nov
No flights
Dec
from USD 185
Jan
No flights
Feb
No flights
Mar
No flights
Airport Details
Origin
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
Destination
Philadelphia
Philadelphia International Airport (PHL)
Philadelphia, PHL
Zone
New York
Elev
36 ft
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