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

28 Sept
Southwest Airlines
18:05PHL
02:55SEA
1 StopUSD 288VIEW DEAL
29 Sept
Frontier Airlines
20:44PHL
03:27SEA
1 StopUSD 92VIEW DEAL
29 Sept
Southwest Airlines
13:45PHL
20:55SEA
1 StopUSD 188VIEW DEAL
30 Sept
Southwest Airlines
06:00PHL
14:00SEA
1 StopUSD 198VIEW DEAL
1 Oct
Southwest Airlines
13:55PHL
03:35SEA
1 StopUSD 201VIEW DEAL
1 Oct
Alaska Airlines
16:48PHL
01:39SEA
1 StopUSD 314VIEW DEAL
19 Oct
Frontier Airlines
05:50PHL
18:12SEA
1 StopUSD 166VIEW DEAL
27 Oct
Frontier Airlines
08:30PHL
18:12SEA
2 StopUSD 107VIEW DEAL
12 Nov
Southwest Airlines
17:15PHL
02:05SEA
1 StopUSD 179VIEW DEAL
8 Dec
Southwest Airlines
07:30PHL
15:50SEA
1 StopUSD 179VIEW DEAL

Philadelphia to Seattle monthly flight fare trend

Sep
from USD 92
Oct
from USD 107
Nov
from USD 179
Dec
from USD 179
Jan
from USD 133
Feb
from USD 211

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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