
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $277 (Kiwi.com) |
One-way from | $141 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $357 |
Good round-trip deal | $357 or less |
Good one-way deal | $206 or less |
Fly from
Fly to
Route
Depart
Return
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mié. 5/6
5:45 pm-12:10 am
1 stop9h 25m
Seattle/Tacoma Intl
jue. 5/7
5:15 am-3:50 pm
1 stop7h 35m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
sáb. 6/6
7:10 am-10:00 am
Nonstop5h 50m
Seattle/Tacoma Intl
lun. 6/15
9:31 pm-5:45 am
Nonstop5h 14m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mar. 5/12
7:10 am-10:00 am
Nonstop5h 50m
Seattle/Tacoma Intl
vie. 5/22
9:20 pm-5:37 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
vie. 5/8
7:10 am-10:00 am
Nonstop5h 50m
Seattle/Tacoma Intl
jue. 5/14
9:20 pm-5:37 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mar. 4/7
4:00 pm-10:30 pm
1 stop9h 30m
Seattle/Tacoma Intl
mar. 4/14
11:45 pm-10:50 am
1 stop8h 05m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
sáb. 6/13
6:57 pm-11:59 pm
1 stop8h 02m
Seattle/Tacoma Intl
mar. 6/23
9:31 pm-5:45 am
Nonstop5h 14m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
jue. 6/11
6:57 pm-11:59 pm
1 stop8h 02m
Seattle/Tacoma Intl
dom. 6/14
9:31 pm-5:45 am
Nonstop5h 14m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mar. 6/9
7:00 am-9:59 am
Nonstop5h 59m
Seattle/Tacoma Intl
sáb. 6/13
9:45 pm-8:44 am
1 stop7h 59m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mié. 4/29
7:15 am-12:25 pm
1 stop8h 10m
Seattle/Tacoma Intl
dom. 5/10
9:20 pm-5:37 am
Nonstop5h 17m
PhiladelphiaSeattle
PHL - SEA
PHLSEA
Philadelphia
mar. 6/16
6:57 pm-11:59 pm
1 stop8h 02m
Seattle/Tacoma Intl
jue. 7/2
9:31 pm-5:45 am
Nonstop5h 14m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
The best time to book flights from Philadelphia to Seattle is 71 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, October is the cheapest month in which you can book a flight from Philadelphia to Seattle (average of $148). Flying from Philadelphia to Seattle in April is currently the most expensive (average of $219). 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.
When flying from Philadelphia to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
About 19% of weekly flights between Philadelphia and Seattle have experienced delays in the past year, with the average delay time being 151 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Over the last year, American Airlines have had the lowest number of delays on this route, with just 16% of flights being delayed.
Denver (DEN) – chosen by Cheapflights users on 67% of 1-stop itineraries from Philadelphia to Seattle on Cheapflights.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $208.
Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 8h 04m.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 05m.
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Eugene,Mar 2026
MFR - SEA
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Eugene,Mar 2026
MFR - SEA
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Eugene,Mar 2026
MFR - SEA
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Eugene,Mar 2026
MFR - SEA
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Eugene,Mar 2026
MFR - SEA
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Eugene,Mar 2026
MFR - SEA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$115 | Average$237 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$130 | Average$295 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$199 | Average$473 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$203 | Average$436 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$224 | Average$373 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$251 | Average$455 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$258 | Average$419 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$276 | Average$424 | FlexibilityNo cancel fee | On-time71% |