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 | $277 (Hawaiian Airlines) |
---|---|
One-way from | $139 (Delta) |
Popular in | June |
Cheapest in | March |
Average price | $467 |
Good round-trip deal | $344 or less |
Good one-way deal | $182 or less |
Fly from
Fly to
Route
Depart
Return
Price
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
vie. 9/26
6:57 pm-10:00 pm
Nonstop6h 03m
Seattle/Tacoma Intl
vie. 10/3
9:30 pm-5:47 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mié. 11/5
5:30 am-2:01 pm
1 stop11h 31m
Seattle/Tacoma Intl
mar. 11/11
1:45 pm-12:23 am
1 stop7h 38m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
dom. 9/28
7:22 am-10:18 am
Nonstop5h 56m
Seattle/Tacoma Intl
lun. 10/6
9:23 pm-5:40 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mié. 10/1
7:22 am-10:18 am
Nonstop5h 56m
Seattle/Tacoma Intl
dom. 10/5
9:23 pm-5:40 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mar. 9/23
6:25 pm-11:54 pm
1 stop8h 29m
Seattle/Tacoma Intl
mié. 10/1
6:00 am-4:38 pm
1 stop7h 38m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mar. 9/23
7:22 am-10:18 am
Nonstop5h 56m
Seattle/Tacoma Intl
jue. 10/2
9:45 pm-6:02 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
vie. 9/26
6:57 pm-10:00 pm
Nonstop6h 03m
Seattle/Tacoma Intl
lun. 9/29
9:45 pm-6:02 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
vie. 9/19
7:22 am-10:18 am
Nonstop5h 56m
Seattle/Tacoma Intl
lun. 9/29
9:45 pm-6:02 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mié. 9/3
6:57 pm-10:00 pm
Nonstop6h 03m
Seattle/Tacoma Intl
vie. 9/12
9:45 pm-6:02 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
sáb. 9/13
7:22 am-10:18 am
Nonstop5h 56m
Seattle/Tacoma Intl
vie. 9/19
9:45 pm-6:02 am
Nonstop5h 17m
The best time to book flights from Philadelphia to Seattle is 29 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 June is currently the most expensive (average of $389). 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 23% 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 (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).
Boarding
Comfort
Entertainment
Food
Overall
Crew
Reviews
Anonymous,Jul 2025
EUG - SEA
Boarding
Comfort
Entertainment
Food
Overall
Crew
Reviews
Anonymous,Jul 2025
EUG - SEA
Boarding
Comfort
Entertainment
Food
Overall
Crew
Reviews
Anonymous,Jul 2025
EUG - SEA
Boarding
Comfort
Entertainment
Food
Overall
Crew
Reviews
Anonymous,Jul 2025
EUG - SEA
Boarding
Comfort
Entertainment
Food
Overall
Crew
Reviews
Anonymous,Jul 2025
EUG - SEA
Boarding
Comfort
Entertainment
Food
Overall
Crew
Reviews
Anonymous,Jul 2025
EUG - SEA
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$127 | Average$244 | FlexibilityNo cancel fee | On-time65% | |
Cheapest$128 | Average$265 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$211 | Average$360 | FlexibilityNo cancel fee | On-time83% | |
Cheapest$277 | Average$487 | FlexibilityNo cancel fee | On-time85% | |
Cheapest$277 | Average$386 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$286 | Average$455 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$289 | Average$495 | FlexibilityNo cancel fee | On-time75% | |
Cheapest$297 | Average$447 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$303 | Average$457 | FlexibilityNo cancel fee | On-time63% |