S$192 Cheap Flights from Seattle to Philadelphia

View S$192 flight on Fri, 5 Sep, 2025Opens in a new window

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

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Cheap Flights from Seattle to Philadelphia (SEA-PHL)

Prices were available within the past 7 days and start at S$192 for one-way flights and S$383 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 5 Sep - Fri, 10 Oct
SEA
Seattle
PHL
Philadelphia
S$383 Return, found 5 days ago
S$383
Return
found 5 days ago
Select Delta flight, departing Fri, 5 Sep from Seattle to Philadelphia, returning Fri, 10 Oct, priced at S$383 found 5 days ago
Delta
Thu, 14 Aug - Wed, 20 Aug
SEA
Seattle
PHL
Philadelphia
S$422 Return, found 5 days ago
S$422
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug from Seattle to Philadelphia, returning Wed, 20 Aug, priced at S$422 found 5 days ago
Delta
Fri, 5 Sep - Fri, 10 Oct
SEA
Seattle
PHL
Philadelphia
S$435 Return, found 5 days ago
S$435
Return
found 5 days ago
Select Delta flight, departing Fri, 5 Sep from Seattle to Philadelphia, returning Fri, 10 Oct, priced at S$435 found 5 days ago
American Airlines
Fri, 5 Sep - Fri, 10 Oct
SEA
Seattle
PHL
Philadelphia
S$435 Return, found 5 days ago
S$435
Return
found 5 days ago
Select American Airlines flight, departing Fri, 5 Sep from Seattle to Philadelphia, returning Fri, 10 Oct, priced at S$435 found 5 days ago
United
Fri, 5 Sep - Fri, 10 Oct
SEA
Seattle
PHL
Philadelphia
S$448 Return, found 5 days ago
S$448
Return
found 5 days ago
Select United flight, departing Fri, 5 Sep from Seattle to Philadelphia, returning Fri, 10 Oct, priced at S$448 found 5 days ago
United
Fri, 5 Sep - Fri, 10 Oct
SEA
Seattle
PHL
Philadelphia
S$454 Return, found 5 days ago
S$454
Return
found 5 days ago
Select United flight, departing Fri, 5 Sep from Seattle to Philadelphia, returning Fri, 10 Oct, priced at S$454 found 5 days ago
Delta
Wed, 3 Sep - Sun, 12 Oct
SEA
Seattle
PHL
Philadelphia
S$486 Return, found 5 days ago
S$486
Return
found 5 days ago
Select Delta flight, departing Wed, 3 Sep from Seattle to Philadelphia, returning Sun, 12 Oct, priced at S$486 found 5 days ago
American Airlines
Sun, 7 Sep - Tue, 7 Oct
SEA
Seattle
PHL
Philadelphia
S$487 Return, found 5 days ago
S$487
Return
found 5 days ago
Select American Airlines flight, departing Sun, 7 Sep from Seattle to Philadelphia, returning Tue, 7 Oct, priced at S$487 found 5 days ago
United
Fri, 5 Sep - Fri, 10 Oct
SEA
Seattle
PHL
Philadelphia
S$499 Return, found 5 days ago
S$499
Return
found 5 days ago
Select United flight, departing Fri, 5 Sep from Seattle to Philadelphia, returning Fri, 10 Oct, priced at S$499 found 5 days ago
Delta
Thu, 14 Aug - Wed, 20 Aug
SEA
Seattle
PHL
Philadelphia
S$500 Return, found 5 days ago
S$500
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug from Seattle to Philadelphia, returning Wed, 20 Aug, priced at S$500 found 5 days ago

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

March is typically the cheapest month to fly

From S$179 - S$520 per traveller.

Graph displaying average flight prices per month

Seattle to Philadelphia route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Philadelphia Intl.
Return price
S$383
Distance
3794 km
Average flight time
9 hours 25 mins

Flights from Seattle to Philadelphia

There are several airlines that operate frequent flights from Seattle (SEA) to Philadelphia (PHL) including

The earliest flight leaves Seattle Tacoma Intl. Airport at 00:50 and arrives at Philadelphia Intl. Airport at 06:32. The last flight of the day departs Seattle at 22:55 and arrives at Philadelphia at 20:11.

The flight distance from Seattle to Philadelphia is about 3837 km, the shortest flight is 05 hours with .

Expedia lets you search across the largest number of airlines and Philadelphia flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Seattle Philadelphia flight!

Browse through dozens of options and rest 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 to Philadelphia trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Philadelphia flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Seattle to Philadelphia with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

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 S$383. 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 cancelled 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 kilometres. Put together a playlist of your favourite 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.

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