For quick check-in, verify your airline’s terminal before arriving. Terminals are spread out, and only some are linked by indoor walkways.
Round-trip from | $305 (Delta) |
---|---|
One-way from | $145 (FlightHub) |
Popular in | June |
Cheapest in | March |
Average price | $487 |
Good round-trip deal | $371 or less |
Good one-way deal | $199 or less |
Fly from
Fly to
Route
Depart
Return
Price
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Mon 8/11
8:00 am-1:50 pm
1 stop8h 50m
Seattle/Tacoma Intl
Tue 8/19
5:30 am-5:46 pm
1 stop9h 16m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Fri 8/29
2:00 pm-7:55 pm
1 stop8h 55m
Seattle/Tacoma Intl
Tue 9/2
11:10 pm-9:55 am
1 stop7h 45m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Thu 7/31
7:19 am-2:06 pm
1 stop9h 47m
Seattle/Tacoma Intl
Sun 8/3
3:11 pm-5:49 am
1 stop11h 38m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Thu 8/21
7:10 pm-10:26 pm
Nonstop6h 16m
Seattle/Tacoma Intl
Fri 8/29
9:45 pm-5:58 am
Nonstop5h 13m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Thu 7/24
7:00 am-4:25 pm
2 stops12h 25m
Seattle/Tacoma Intl
Tue 7/29
6:25 am-5:09 am
1 stop19h 44m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Tue 7/29
9:15 pm-4:25 pm
2 stops22h 10m
Seattle/Tacoma Intl
Tue 8/5
5:30 pm-8:51 pm
2 stops24h 21m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Tue 8/26
6:58 pm-10:00 pm
Nonstop6h 02m
Seattle/Tacoma Intl
Mon 9/8
9:45 pm-6:02 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Tue 8/5
7:59 pm-12:56 am
1 stop7h 57m
Seattle/Tacoma Intl
Mon 8/11
12:20 am-10:47 am
1 stop7h 27m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Sun 8/24
12:19 pm-2:46 pm
1 stop29h 27m
Seattle/Tacoma Intl
Sun 8/31
11:55 pm-11:14 am
1 stop8h 19m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
Mon 8/25
6:25 am-12:34 am
1 stop21h 09m
The best time to book flights from Philadelphia to Seattle is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, January is the cheapest month in which you can book a flight from Philadelphia to Seattle (average of $238). Flying from Philadelphia to Seattle in July is currently the most expensive (average of $390). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
One of the essential ways to save on airfare from Philadelphia to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 24% on airfare.
Travelers seeking maximum savings on their Philadelphia to Seattle flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from PHL to SEA are scheduled on a Thursday (12 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).
Entertainment
Crew
Food
Comfort
Boarding
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Comfort
Boarding
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Comfort
Boarding
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Comfort
Boarding
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Comfort
Boarding
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Comfort
Boarding
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$128 | Average$238 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$136 | Average$258 | FlexibilityNo cancel fee | On-time65% | |
Cheapest$198 | Average$368 | FlexibilityNo cancel fee | On-time83% | |
Cheapest$280 | Average$393 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$286 | Average$459 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$288 | Average$495 | FlexibilityNo cancel fee | On-time85% | |
Cheapest$295 | Average$489 | FlexibilityNo cancel fee | On-time75% | |
Cheapest$297 | Average$451 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$321 | Average$463 | FlexibilityNo cancel fee | On-time63% |