Cheap Flights from Seattle (SEA) to Philadelphia (PHL) from HK$1,239~

View HK$1,239 flight on Sun, 14 Dec 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Philadelphia Intl. Airport (PHL)

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Find Cheap Flights from Seattle (SEA) to Philadelphia (PHL)

Prices were available within the past 7 days and start at HK$1,239 for one-way flights and HK$2,155 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 16 Dec - Thu, 8 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,155 Return, found 1 day ago
HK$2,155
Return
found 1 day ago
Select Delta flight, departing Tue, 16 Dec from Seattle to Philadelphia, returning Thu, 8 Jan, priced at HK$2,155 found 1 day ago
Alaska Airlines
Thu, 11 Dec - Wed, 7 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,315 Return, found 1 day ago
HK$2,315
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 11 Dec from Seattle to Philadelphia, returning Wed, 7 Jan, priced at HK$2,315 found 1 day ago
Alaska Airlines
Thu, 11 Dec - Thu, 8 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,466 Return, found 1 day ago
HK$2,466
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 11 Dec from Seattle to Philadelphia, returning Thu, 8 Jan, priced at HK$2,466 found 1 day ago
Alaska Airlines
Sat, 13 Dec - Tue, 6 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,541 Return, found 1 day ago
HK$2,541
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 13 Dec from Seattle to Philadelphia, returning Tue, 6 Jan, priced at HK$2,541 found 1 day ago
Alaska Airlines
Tue, 16 Dec - Tue, 6 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,702 Return, found 1 day ago
HK$2,702
Return
found 1 day ago
Select Alaska Airlines flight, departing Tue, 16 Dec from Seattle to Philadelphia, returning Tue, 6 Jan, priced at HK$2,702 found 1 day ago
American Airlines
Wed, 17 Dec - Tue, 6 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,777 Return, found 1 day ago
HK$2,777
Return
found 1 day ago
Select American Airlines flight, departing Wed, 17 Dec from Seattle to Philadelphia, returning Tue, 6 Jan, priced at HK$2,777 found 1 day ago
Delta
Sun, 14 Dec - Mon, 5 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,844 Return, found 1 day ago
HK$2,844
Return
found 1 day ago
Select Delta flight, departing Sun, 14 Dec from Seattle to Philadelphia, returning Mon, 5 Jan, priced at HK$2,844 found 1 day ago
Alaska Airlines
Sat, 13 Dec - Mon, 5 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,853 Return, found 1 day ago
HK$2,853
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 13 Dec from Seattle to Philadelphia, returning Mon, 5 Jan, priced at HK$2,853 found 1 day ago
Delta
Sun, 14 Dec - Mon, 5 Jan
SEA
Seattle
PHL
Philadelphia
HK$2,865 Return, found 1 day ago
HK$2,865
Return
found 1 day ago
Select Delta flight, departing Sun, 14 Dec from Seattle to Philadelphia, returning Mon, 5 Jan, priced at HK$2,865 found 1 day ago
United
Sun, 14 Dec - Mon, 5 Jan
SEA
Seattle
PHL
Philadelphia
HK$3,381 Return, found 1 day ago
HK$3,381
Return
found 1 day ago
Select United flight, departing Sun, 14 Dec from Seattle to Philadelphia, returning Mon, 5 Jan, priced at HK$3,381 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to Philadelphia (PHL)

March is typically the cheapest month to fly

From HK$1,139 - HK$3,192 per traveller.

Frequently asked questions

How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to PHL?
The lowest price advertised for a round-trip journey between SEA and Philadelphia Airport is HK$2,155. But you better act fast. This price is taken from fares quoted within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Philadelphia Airport?
Most flights can be canceled online, but each airline has different terms and conditions. If you do decide to cancel your flight, go to our Customer Service Portal and follow the instructions.
How do I find cheap flights from SEA to PHL that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Philadelphia Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Philadelphia Intl. Airport (PHL)?
You'll be soaring through the sky for a while, as the flight distance from SeaTac to Philadelphia is 3,800 kilometers. Put together a playlist of your favorite songs before leaving home to keep yourself entertained during the journey.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Philadelphia Intl. Airport (PHL)?
Alaska Airlines (AS) is a top choice. It operates 30 flights from Sea-Tac Airport to Philadelphia Intl. Airport (PHL) each month. Love some more options? Check out the ticket prices from American Airlines (AA). This carrier offers 30 flights a month between these destinations.
Are Sea-Tac Airport to PHL flight tickets cheaper when they're purchased at the last minute?
Flight tickets from SEA to PHL are available up to a year prior to departure on Expedia. And although you may pick up a fantastic last-minute deal, it's never something you can count on. Also, booking your flights well in advance means you'll have more choices — and you can avoid getting caught in the dreaded middle seat! We regularly update our fares to bring you the biggest bargains, so keep checking in for all the latest specials.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Philadelphia Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
HK$2,155
Distance
3794 km
Average flight time
8 hours 53 mins

Book with confidence

Flights from Seattle to Philadelphia

Book cheap flights from Seattle (SEA) to Philadelphia (PHL) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Seattle (SEA) to Philadelphia (PHL) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle (SEA) to Philadelphia (PHL) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Philadelphia flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Philadelphia and things to do in Philadelphia for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Philadelphia more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Philadelphia is HK$1,239 now!

 

Flights from Seattle to Philadelphia

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