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: Tue Mar 28 2017 Return: Tue Apr 4 2017 Trip spans 8 days
Frontier
Frontier
PHL
2:00a
SEA
4:43p
14h 43m
1 stop
SEA
2:55p
PHL
11:03p
8h 08m
1 stop
Depart: Wed Apr 26 2017 Return: Wed May 3 2017 Trip spans 8 days
Major Airline
Major Airline
PHL
12:19a
SEA
8:53a
8h 34m
1 stop
SEA
2:54a
PHL
8:54p
18h 00m
1 stop
Depart: Tue Mar 14 2017 Return: Tue Mar 21 2017 Trip spans 8 days
Spirit Airlines
Spirit Airlines
PHL
4:40p
SEA
12:53p
20h 13m
1 stop
SEA
2:00a
PHL
12:55p
10h 55m
1 stop
Depart: Sat Mar 18 2017 Return: Tue Mar 21 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
PHL
4:00a
SEA
9:58a
5h 58m
nonstop
SEA
6:45p
PHL
11:45p
5h 00m
nonstop
Depart: Wed Mar 29 2017 Return: Tue Apr 11 2017 Trip spans 14 days
American Airlines
American Airlines
PHL
1:55p
SEA
8:13p
6h 18m
nonstop
SEA
8:15p
PHL
6:08a
9h 53m
1 stop
Depart: Wed Apr 12 2017 Return: Tue Apr 18 2017 Trip spans 7 days
United
United
PHL
2:20p
SEA
12:13a
9h 53m
1 stop
SEA
2:55p
PHL
11:54p
8h 59m
1 stop
Depart: Thu May 4 2017 Return: Fri May 5 2017 Trip spans 2 days
Delta
Delta
PHL
12:20p
SEA
8:58p
8h 38m
1 stop
SEA
3:15a
PHL
10:33a
7h 18m
1 stop
Depart: Sat Aug 26 2017 Return: Wed Sep 6 2017 Trip spans 12 days
JetBlue
JetBlue
PHL
6:25a
SEA
6:44p
12h 19m
1 stop
SEA
7:05a
PHL
4:25p
9h 20m
1 stop
Depart: Sat Apr 22 2017 Return: Tue Apr 25 2017 Trip spans 4 days
Frontier
Frontier
PHL
6:30p
SEA
9:15a
14h 45m
1 stop
SEA
6:55a
PHL
5:33p
10h 38m
1 stop
Depart: Mon Mar 20 2017 Return: Tue Mar 28 2017 Trip spans 9 days
Spirit Airlines
Spirit Airlines
PHL
4:40p
SEA
12:53p
20h 13m
1 stop
SEA
2:00a
PHL
12:55p
10h 55m
1 stop
Depart: Tue Apr 25 2017 Return: Tue May 2 2017 Trip spans 8 days
Frontier
Frontier
PHL
5:50p
SEA
9:15a
15h 25m
1 stop
SEA
3:10p
PHL
10:41p
7h 31m
1 stop
Depart: Tue Mar 21 2017 Return: Tue Mar 28 2017 Trip spans 8 days
Spirit Airlines
Spirit Airlines
PHL
4:40p
SEA
12:53p
20h 13m
1 stop
SEA
2:00a
PHL
12:55p
10h 55m
1 stop
Depart: Fri Mar 31 2017 Return: Mon Apr 10 2017 Trip spans 11 days
Major Airline
Major Airline
PHL
2:15a
SEA
5:46p
15h 31m
1 stop
SEA
1:55a
PHL
7:03p
17h 08m
1 stop
Depart: Wed Apr 19 2017 Return: Thu Apr 27 2017 Trip spans 9 days
Major Airline
Major Airline
PHL
2:15a
SEA
8:53a
30h 38m
1 stop
SEA
11:10a
PHL
6:41p
7h 31m
1 stop
Depart: Thu Mar 16 2017 Return: Tue Mar 21 2017 Trip spans 6 days
Frontier
Frontier
PHL
2:00a
SEA
4:43p
14h 43m
1 stop
SEA
2:55p
PHL
11:05p
8h 10m
1 stop
Depart: Tue Apr 4 2017 Return: Tue Apr 11 2017 Trip spans 8 days
American Airlines
American Airlines
PHL
1:55p
SEA
7:55p
6h 00m
nonstop
SEA
5:30a
PHL
3:49p
10h 19m
1 stop
Depart: Mon May 1 2017 Return: Tue May 9 2017 Trip spans 9 days
Spirit Airlines
Spirit Airlines
PHL
12:58p
SEA
7:45a
18h 47m
1 stop
SEA
11:23a
PHL
11:47p
12h 24m
1 stop
Depart: Thu Mar 23 2017 Return: Mon Mar 27 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
PHL
4:00a
SEA
9:58a
5h 58m
nonstop
SEA
6:45p
PHL
11:45p
5h 00m
nonstop
Depart: Fri May 5 2017 Return: Sun May 7 2017 Trip spans 3 days
Delta
Delta
PHL
2:15p
SEA
10:35p
8h 20m
1 stop
SEA
2:00a
PHL
10:33a
8h 33m
1 stop
Depart: Fri Apr 21 2017 Return: Tue Apr 25 2017 Trip spans 5 days
Frontier
Frontier
PHL
12:56p
SEA
9:15a
20h 19m
1 stop
SEA
3:10p
PHL
10:41p
7h 31m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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
$229
Destination

Seattle
$229
Airlines Airline reviews

30 travelers who booked a flight from Philadelphia to Seattle rated their chosen airlines with an average of 6.9.

Overall
7.0
Boarding
7.6
Crew
7.9
Comfort
6.8
Food
6.0
Entertainment
5.7