Philadelphia to Seattle

PHLSEA

Fly from Philadelphia to Seattle starting at USD 107 with Frontier Airlines.Best fare available on Oct 27, 2026.Limited seats. Better plans. Book before it's gone.

Philadelphia to Seattle cheapest flights this week

10 Oct
United Airlines
17:08PHL
01:56SEA
1 StopUSD 421VIEW 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
12 Jan
Southwest Airlines
05:20PHL
14:10SEA
1 StopUSD 133VIEW DEAL
28 Feb
Southwest Airlines
05:05PHL
13:40SEA
1 StopUSD 211VIEW DEAL
9 Mar
Southwest Airlines
07:35PHL
16:00SEA
1 StopUSD 189VIEW DEAL
16 Mar
United Airlines
06:10PHL
17:18SEA
1 StopUSD 146VIEW DEAL

Philadelphia to Seattle monthly flight fare trend

Oct
from USD 107
Nov
from USD 179
Dec
from USD 179
Jan
from USD 133
Feb
from USD 211
Mar
from USD 146

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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