Seattle to Philadelphia
SEAPHL
Fly from Seattle to Philadelphia starting at USD 96 with F9.
Best fare available on Aug 5, 2026.
Limited seats. Better plans. Book before it's gone.
Seattle to Philadelphia cheapest flights this week
11 May
SY
18:05SEA
07:54PHL
1 Stop$272VIEW DEAL
13 May
WN
06:00SEA
14:50PHL
1 Stop$207VIEW DEAL
4 Jun
AA
22:35SEA
03:47PHL
Direct$174VIEW DEAL
5 Aug
F9
19:41SEA
08:49PHL
1 Stop$96VIEW DEAL
Seattle to Philadelphia monthly flight fare trend
May
from USD 125
Jun
from USD 174
Jul
No flights
Aug
from USD 96
Sep
No flights
Oct
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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