Cheap Flights From Seattle - Tacoma Intl. (SEA) To Philadelphia Intl. (PHL)

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Cheapest Flights from Seattle (SEA) to Philadelphia (PHL)

The cheapest flights to Philadelphia Intl. found within the past 7 days were CA $381 round trip and CA $189 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Oct. 9 - Wed, Oct. 15
SEA
Seattle
PHL
Philadelphia
CA $381 Roundtrip, found 4 days ago
CA $381
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct. 9 from Seattle to Philadelphia, returning Wed, Oct. 15, priced at CA $381 found 4 days ago
Thu, Sep. 4 - Wed, Sep. 10
SEA
Seattle
PHL
Philadelphia
CA $384 Roundtrip, found 4 days ago
CA $384
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Seattle to Philadelphia, returning Wed, Sep. 10, priced at CA $384 found 4 days ago
Wed, Sep. 3 - Sun, Sep. 7
SEA
Seattle
PHL
Philadelphia
CA $385 Roundtrip, found 1 day ago
CA $385
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Sep. 3 from Seattle to Philadelphia, returning Sun, Sep. 7, priced at CA $385 found 1 day ago
Wed, Sep. 3 - Fri, Sep. 5
SEA
Seattle
PHL
Philadelphia
CA $454 Roundtrip, found 1 day ago
CA $454
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Sep. 3 from Seattle to Philadelphia, returning Fri, Sep. 5, priced at CA $454 found 1 day ago
Thu, Oct. 9 - Wed, Oct. 15
SEA
Seattle
PHL
Philadelphia
CA $481 Roundtrip, found 4 days ago
CA $481
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct. 9 from Seattle to Philadelphia, returning Wed, Oct. 15, priced at CA $481 found 4 days ago
Thu, Aug. 28 - Thu, Apr. 16
SEA
Seattle
PHL
Philadelphia
CA $483 Roundtrip, found 1 day ago
CA $483
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Aug. 28 from Seattle to Philadelphia, returning Thu, Apr. 16, priced at CA $483 found 1 day ago
Thu, Sep. 4 - Wed, Sep. 10
SEA
Seattle
PHL
Philadelphia
CA $485 Roundtrip, found 4 days ago
CA $485
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Seattle to Philadelphia, returning Wed, Sep. 10, priced at CA $485 found 4 days ago
Thu, Oct. 9 - Wed, Oct. 15
SEA
Seattle
PHL
Philadelphia
CA $489 Roundtrip, found 4 days ago
CA $489
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct. 9 from Seattle to Philadelphia, returning Wed, Oct. 15, priced at CA $489 found 4 days ago
Mon, Oct. 6 - Thu, Oct. 9
SEA
Seattle
PHL
Philadelphia
CA $496 Roundtrip, found 4 days ago
CA $496
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Mon, Oct. 6 from Seattle to Philadelphia, returning Thu, Oct. 9, priced at CA $496 found 4 days ago
Fri, Sep. 5 - Thu, Sep. 11
SEA
Seattle
PHL
Philadelphia
CA $501 Roundtrip, found 1 day ago
CA $501
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Sep. 5 from Seattle to Philadelphia, returning Thu, Sep. 11, priced at CA $501 found 1 day ago

Frequently asked questions

Are there direct flights from SEA to Philadelphia Airport?
Your next incredible adventure is on the other side of a single flight. You can fly direct from Seattle - Tacoma Intl. Airport (SEA) to PHL with multiple airlines, including American Airlines and Alaska Airlines.
What airlines fly from SEA to Philadelphia Airport?
There are a few airlines that advertise direct flights from Seattle - Tacoma Intl. Airport (SEA) to Philadelphia Airport. American Airlines (AA) is reputable, and operates approximately 52 flights each month. You may want to also look up the deals available through Alaska Airlines (AS). Another leading airline, it operates 30 flights each month on the Seattle to Philadelphia route. Be sure to compare the two airlines to score the best fare.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.