Find Deals on Flights from Philadelphia to Seattle

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Philadelphia to Seattle

(Round-trip)
Depart: Fri Apr 21 2017 Return: Mon Apr 24 2017 Trip spans 4 days
Frontier
Frontier
PHL
6:30p
SEA
9:15a
14h 45m
1 stop
SEA
2:35p
PHL
12:01a
9h 26m
1 stop
Depart: Tue Apr 25 2017 Return: Fri Apr 28 2017 Trip spans 4 days
Major Airline
Major Airline
PHL
6:32a
SEA
8:53a
26h 21m
1 stop
SEA
3:38p
PHL
3:05a
11h 27m
1 stop
Depart: Fri Mar 31 2017 Return: Tue Apr 4 2017 Trip spans 5 days
United
United
PHL
2:00a
SEA
10:26a
8h 26m
1 stop
SEA
2:55p
PHL
11:54p
8h 59m
1 stop
Depart: Tue Apr 4 2017 Return: Tue Apr 11 2017 Trip spans 8 days
Delta
Delta
PHL
12:53p
SEA
10:24p
9h 31m
1 stop
SEA
6:45p
PHL
3:23a
8h 38m
1 stop
Depart: Sat Apr 15 2017 Return: Mon Apr 24 2017 Trip spans 10 days
American Airlines
American Airlines
PHL
1:55p
SEA
7:55p
6h 00m
nonstop
SEA
7:59p
PHL
4:37a
8h 38m
1 stop
Depart: Sun Apr 2 2017 Return: Wed Apr 5 2017 Trip spans 4 days
Spirit Airlines
Spirit Airlines
PHL
4:40p
SEA
12:53p
20h 13m
1 stop
SEA
2:00a
PHL
1:28p
11h 28m
1 stop
Depart: Thu Mar 30 2017 Return: Tue Apr 4 2017 Trip spans 6 days
Alaska Airlines
Alaska Airlines
PHL
4:00a
SEA
9:58a
5h 58m
nonstop
SEA
6:45p
PHL
11:45p
5h 00m
nonstop
Depart: Tue Sep 5 2017 Return: Sun Sep 17 2017 Trip spans 13 days
JetBlue
JetBlue
PHL
9:39a
SEA
6:53p
9h 14m
1 stop
SEA
7:30p
PHL
5:17a
9h 47m
1 stop
Depart: Sat Apr 22 2017 Return: Mon Apr 24 2017 Trip spans 3 days
Frontier
Frontier
PHL
1:00p
SEA
9:15a
20h 15m
1 stop
SEA
2:35p
PHL
12:01a
9h 26m
1 stop
Depart: Sun Apr 30 2017 Return: Tue May 2 2017 Trip spans 3 days
Major Airline
Major Airline
PHL
1:50p
SEA
5:15a
15h 25m
1 stop
SEA
2:55a
PHL
8:01p
17h 06m
1 stop
Depart: Wed Apr 26 2017 Return: Sat Apr 29 2017 Trip spans 4 days
Frontier
Frontier
PHL
6:30p
SEA
9:15a
14h 45m
1 stop
SEA
2:35p
PHL
12:01a
9h 26m
1 stop
Depart: Thu Apr 27 2017 Return: Mon May 1 2017 Trip spans 5 days
Frontier
Frontier
PHL
5:50p
SEA
9:15a
15h 25m
1 stop
SEA
5:57a
PHL
12:01a
18h 04m
1 stop
Depart: Wed Mar 29 2017 Return: Mon Apr 10 2017 Trip spans 13 days
Major Airline
Major Airline
PHL
9:30p
SEA
8:53a
11h 23m
1 stop
SEA
10:55a
PHL
7:03p
8h 08m
1 stop
Depart: Mon Apr 3 2017 Return: Wed Apr 5 2017 Trip spans 3 days
United
United
PHL
2:20p
SEA
12:12a
9h 52m
1 stop
SEA
6:40p
PHL
2:19a
7h 39m
1 stop
Depart: Tue May 23 2017 Return: Sat Jun 3 2017 Trip spans 12 days
Delta
Delta
PHL
2:18p
SEA
10:10p
7h 52m
1 stop
SEA
2:40a
PHL
11:57a
9h 17m
1 stop
Depart: Fri Apr 28 2017 Return: Mon May 1 2017 Trip spans 4 days
Frontier
Frontier
PHL
6:30p
SEA
9:15a
14h 45m
1 stop
SEA
2:35p
PHL
12:01a
9h 26m
1 stop
Depart: Mon Apr 17 2017 Return: Mon Apr 24 2017 Trip spans 8 days
Major Airline
Major Airline
PHL
2:15a
SEA
5:46p
15h 31m
1 stop
SEA
4:46a
PHL
10:36p
17h 50m
1 stop
Depart: Wed Apr 12 2017 Return: Wed Apr 19 2017 Trip spans 8 days
United
United
PHL
2:20p
SEA
12:13a
9h 53m
1 stop
SEA
6:40p
PHL
2:19a
7h 39m
1 stop
Depart: Sat Sep 2 2017 Return: Tue Sep 5 2017 Trip spans 4 days
Delta
Delta
PHL
1:25p
SEA
9:21p
7h 56m
1 stop
SEA
8:10p
PHL
4:49a
8h 39m
1 stop
Depart: Wed Jun 14 2017 Return: Mon Jun 26 2017 Trip spans 13 days
American Airlines
American Airlines
PHL
9:00a
SEA
9:30p
12h 30m
1 stop
SEA
6:30p
PHL
11:34p
5h 04m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

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Airports
Origin

Philadelphia
$270
Destination

Seattle
$270
Airlines Airline reviews

31 travelers who booked a flight from Philadelphia to Seattle rated their chosen airlines with an average of 7.0.

Overall
7.1
Boarding
7.6
Crew
7.9
Comfort
6.9
Food
6.1
Entertainment
5.8