Find cheap flights from Philadelphia to Seattle/Tacoma Airport

PHL - SEA

Find cheap flights from Philadelphia to Seattle/Tacoma Airport

Round-trip
Economy
Philadelphia (PHL)
Seattle/Tacoma Intl
Wed 7/8
Wed 7/15
Any month
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Good to know

Low season

February Best time to beat the crowds with an average 18% drop in price.

High season

June Most popular time to fly with an average 12% increase in price.

Average price of a round-trip

$349 (avg. price over the last 2 weeks)

Good deal for a round-trip

$334 or less

When to book flights from Philadelphia to Seattle/Tacoma Intl

Estimated round-trip price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for $213 or less.
  • The cheapest flight from Philadelphia to Seattle/Tacoma Airport was found 62 days before departure, on average.
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is February.
  • Morning departure is around 64% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking Philadelphia to Seattle/Tacoma Airport flights

Are flight prices cheaper from Philadelphia to Seattle/Tacoma Airport because of Coronavirus (COVID-19)?

How long does a flight from Philadelphia to Seattle/Tacoma Airport take?

How many flights are there between Philadelphia and Seattle/Tacoma Airport?

Which airlines provide the cheapest flights from Philadelphia to Seattle/Tacoma Airport?

Do I need a passport to fly between Philadelphia and Seattle/Tacoma Airport?

Which airlines fly most frequently between Philadelphia and Seattle/Tacoma Airport?

What’s the cheapest day of the week to fly Philadelphia to Seattle/Tacoma Airport?

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Top airlines flying Philadelphia to Seattle/Tacoma Intl

Scores according to KAYAK customer reviews

7.7
Sun Country Air
Overall score based on 9,064 reviews
8.2
Boarding
7.7
Comfort
8.4
Crew
6.8
Entertainment
7.1
Food
Airline reviews
Read more about Sun Country Air

Book cheap flights from Philadelphia to Seattle/Tacoma Airport (round-trip)

Airports
Origin
Philadelphia
$178
only
$178
Destination
Seattle
$178
only
$178
Wed, Aug 19
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Wed, Aug 26
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
24h 29m
Trip: 8 days
Based on null reviews
Tue, Aug 11
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Thu, Aug 13
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
28h 34m
Trip: 3 days
Based on null reviews
Sat, Aug 8
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Mon, Aug 10
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
11h 56m
Trip: 3 days
Based on null reviews
Mon, Jul 27
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
21h 35m
Mon, Aug 3
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
26h 29m
Trip: 8 days
Based on null reviews
Wed, Aug 19
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Tue, Aug 25
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
16h 22m
Trip: 7 days
Based on null reviews
Sun, Jul 19
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
19h 31m
Mon, Aug 17
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
28h 34m
Trip: 30 days
Based on null reviews
Sat, Aug 8
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Tue, Aug 11
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
20h 06m
Trip: 4 days
Based on null reviews
Mon, Aug 3
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
21h 35m
Mon, Aug 10
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
36h 02m
Trip: 8 days
Based on null reviews
Tue, Aug 4
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
14h 59m
Tue, Aug 11
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
20h 06m
Trip: 8 days
Based on null reviews
Sun, Jul 19
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
19h 31m
Thu, Aug 20
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
20h 18m
Trip: 33 days
Based on null reviews
Tue, Jul 28
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
14h 59m
Tue, Aug 11
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
20h 06m
Trip: 15 days
Based on null reviews
Sat, Aug 8
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
31h 20m
Tue, Aug 11
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
20h 18m
Trip: 4 days
Based on null reviews
Mon, Jul 27
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
21h 35m
Mon, Aug 3
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
18h 00m
Trip: 8 days
Based on null reviews
Sun, Aug 2
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
19h 31m
Sun, Aug 9
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
43h 53m
Trip: 8 days
Based on null reviews
Tue, Jul 28
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
27h 38m
Mon, Aug 10
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
33h 57m
Trip: 14 days
Based on null reviews
Wed, Aug 5
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
12h 19m
Sat, Aug 8
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
22h 09m
Trip: 4 days
Based on null reviews
Tue, Aug 11
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Sun, Aug 16
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
20h 24m
Trip: 6 days
Based on null reviews
Sat, Aug 8
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
31h 20m
Sun, Aug 9
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
40h 22m
Trip: 2 days
Based on null reviews
Mon, Aug 3
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
21h 35m
Mon, Aug 10
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
33h 57m
Trip: 8 days
Based on null reviews
Thu, Aug 6
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
13h 31m
Sun, Aug 9
SEA
Seattle/Tacoma Airport
PHL
Philadelphia Airport
21h 17m
Trip: 4 days
Based on null reviews
Show more results

Book cheap flights from Philadelphia to Seattle/Tacoma Airport (one-way)

Airports
Origin
Philadelphia
$67
only
$67
Destination
Seattle
$67
only
$67
Tue, Aug 11
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Based on null reviews
Tue, Jul 14
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
74h 01m
Based on null reviews
Fri, Jul 17
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
7h 51m
Based on null reviews
Mon, Aug 10
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Based on null reviews
Tue, Sep 15
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
9h 15m
Based on null reviews
Sun, Jul 19
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
19h 31m
Based on null reviews
Sat, Aug 8
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 53m
Based on null reviews
Sun, Jul 19
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
19h 31m
Based on null reviews
Tue, Jul 14
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
93h 35m
Based on null reviews
Sun, Jul 26
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
19h 31m
Based on null reviews
Sat, Aug 8
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
31h 20m
Based on null reviews
Mon, Jul 20
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
8h 01m
Based on null reviews
Tue, Jul 28
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
14h 59m
Based on null reviews
Sat, Jul 18
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
25h 58m
Based on null reviews
Tue, Jul 14
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
21h 35m
Based on null reviews
Sat, Jul 18
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
43h 31m
Based on null reviews
Fri, Jul 31
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
38h 59m
Based on null reviews
Wed, Aug 19
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
22h 39m
Based on null reviews
Wed, Aug 5
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
23h 52m
Based on null reviews
Mon, Aug 10
PHL
Philadelphia Airport
SEA
Seattle/Tacoma Airport
15h 19m
Based on null reviews
Show more results
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

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.

We compile tonnes of data for you
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.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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