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Cheap flights from Seattle to Philadelphia from $92

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Philadelphia departing on 4/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Seattle to Philadelphia

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Philadelphia.
12:30 pm - 5:52 amSEA-PHL
14h 22m1 stop
6:00 pm - 12:10 amPHL-SEA
9h 10m1 stop
$205Spirit Airlines
Find Deal
Tue, May 6 - Wed, May 14
12:30 pm - 5:52 amSEA-PHL
14h 22m1 stop
6:00 pm - 12:10 amPHL-SEA
9h 10m1 stop
$209Spirit Airlines
Find Deal
Tue, May 6 - Tue, May 13
8:56 pm - 4:22 pmSEA-PHL
16h 26m1 stop
10:08 pm - 11:35 amPHL-SEA
16h 27m1 stop
$220Spirit Airlines
Find Deal
Mon, Apr 28 - Mon, May 5
6:52 pm - 6:52 amSEA-PHL
9h 00m1 stop
12:20 pm - 12:44 amPHL-SEA
15h 24m1 stop
$238Frontier
Find Deal
Fri, May 9 - Mon, May 12
12:21 pm - 5:37 pmSEA-PHL
26h 16m1 stop
6:54 pm - 6:00 pmPHL-SEA
26h 06m1 stop
$240Frontier
Find Deal
Thu, May 1 - Sun, May 4
10:41 pm - 6:48 amSEA-PHL
5h 07mnonstop
5:33 pm - 10:55 pmPHL-SEA
8h 22m1 stop
$312American Airlines
Find Deal
Wed, Jul 2 - Mon, Jul 7
10:55 pm - 8:51 amSEA-PHL
6h 56m1 stop
6:55 pm - 11:24 pmPHL-SEA
7h 29m1 stop
$315Delta
Find Deal
Sat, Apr 19 - Thu, Apr 24
10:00 pm - 6:09 amSEA-PHL
5h 09mnonstop
8:20 am - 11:17 amPHL-SEA
5h 57mnonstop
$323American Airlines
Find Deal
Thu, Aug 21 - Tue, Aug 26
5:12 pm - 5:50 amSEA-PHL
9h 38m1 stop
12:28 pm - 6:55 pmPHL-SEA
9h 27m1 stop
$343Delta
Find Deal
Thu, Apr 24 - Tue, Apr 29
9:29 pm - 5:44 amSEA-PHL
5h 15mnonstop
6:53 pm - 10:00 pmPHL-SEA
6h 07mnonstop
$397Alaska Airlines
Find Deal
Fri, Apr 25 - Tue, Apr 29

Frontier flights from Seattle to Philadelphia

Our best Frontier deals on Seattle to Philadelphia flight tickets
Frontier
May 9
SEA6:52 pmSeattle/Tacoma Intl
9h 00m
1 stop
PHL6:52 amPhiladelphia
May 12
PHL12:20 pmPhiladelphia
15h 24m
1 stop
SEA12:44 amSeattle/Tacoma Intl
Frontier
May 1
SEA12:21 pmSeattle/Tacoma Intl
26h 16m
1 stop
PHL5:37 pmPhiladelphia
May 4
PHL6:54 pmPhiladelphia
26h 06m
1 stop
SEA6:00 pmSeattle/Tacoma Intl
Frontier
Apr 15
SEA4:16 pmSeattle/Tacoma Intl
11h 31m
1 stop
PHL6:47 amPhiladelphia
Apr 19
PHL6:40 amPhiladelphia
11h 52m
1 stop
SEA3:32 pmSeattle/Tacoma Intl

Southwest flights from Seattle to Philadelphia

Our best Southwest deals on Seattle to Philadelphia flight tickets
Southwest
Jun 6
SEA10:55 pmSeattle/Tacoma Intl
7h 30m
1 stop
PHL9:25 amPhiladelphia
Jun 10
PHL4:45 pmPhiladelphia
10h 30m
2 stops
SEA12:15 amSeattle/Tacoma Intl
Southwest
Jul 30
SEA10:40 pmSeattle/Tacoma Intl
10h 50m
1 stop
PHL12:30 pmPhiladelphia
Aug 14
PHL5:55 amPhiladelphia
10h 40m
2 stops
SEA1:35 pmSeattle/Tacoma Intl
Southwest
Jun 10
SEA10:55 pmSeattle/Tacoma Intl
7h 20m
1 stop
PHL9:15 amPhiladelphia
Jun 15
PHL6:15 pmPhiladelphia
9h 30m
2 stops
SEA12:45 amSeattle/Tacoma Intl

See travel insights to Philadelphia from

How to get the cheapest flight ticket from Seattle to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from Seattle is in January. Flight prices, which tend to average around $402, are often lower during this time because this is during the off-season. The month of April is another great option to travel to Philadelphia, with average flight prices from Seattle averaging around $402.

What is the cheapest day to depart on your flight to Philadelphia?

The cheapest day to depart from Seattle to Philadelphia is on a Tuesday. Travelers who choose to depart for Philadelphia on a Tuesday will often find tickets for as low as $481. On the other hand, Sunday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $599.

What is the cheapest time of day to depart on your flight to Philadelphia?

According to our data, the cheapest time of day to fly to Philadelphia is at noon. momondo users have found flights departing from Seattle to Philadelphia at noon for as low as $344. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the afternoon when prices are around $726.

What is the cheapest Seattle/Tacoma Intl to Philadelphia flight route?

Fly from Seattle/Tacoma Intl to Philadelphia for the best Seattle/Tacoma Intl - Philadelphia flight prices

How far in advance should I book a flight to Philadelphia?

You are more likely to see cheaper flights to Philadelphia from Seattle when booking 13 weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $460 when searching 13 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Seattle for as low as $372 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Philadelphia flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to Philadelphia flight prices changed over time?

As of March 2025, prices for Seattle to Philadelphia flights are approximately 59% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Philadelphia

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Philadelphia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Philadelphia (SEA to PHL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Philadelphia

Best Price Found

$92

Fastest flight time

5h 06m

Direct flights

Every day

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from Seattle in the past 72 hours is $92. The best round-trip flight deal from Seattle to Philadelphia found on momondo in the last 72 hours is $205.
The fastest flight from Seattle to Philadelphia takes 5h 06m
Direct flights go from Seattle to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)

  • How far is Seattle/Tacoma Intl to Philadelphia by plane?

    The distance between Seattle/Tacoma Intl and Philadelphia is about 2372.3 mi. Typically, this will take 5h 06m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Philadelphia Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Philadelphia Airport were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Philadelphia Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Philadelphia Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Philadelphia Airport.

  • What documentation or ID do you need to fly to Philadelphia Airport?

    The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Philadelphia?

  • What is the most popular airline from Seattle to Philadelphia?


Best airlines flying from Seattle to Philadelphia

Compare and see reviews for airlines that fly from Seattle to Philadelphia with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $85Free CancellationRating
6.3
7,881 reviews
Search Spirit Airlines flights
FrontierPriceFrom $128Free CancellationRating
6.0
3,274 reviews
Search Frontier flights
Sun Country AirPriceFrom $220Free CancellationRating
6.9
349 reviews
Search Sun Country Air flights
DeltaPriceFrom $260Free CancellationRating
8.0
7,899 reviews
Search Delta flights
United AirlinesPriceFrom $271Free CancellationRating
7.4
8,614 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $287Free CancellationRating
8.0
9,811 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $304Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Hawaiian AirlinesPriceFrom $327Free CancellationRating
7.9
2,342 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $346Free CancellationRating
8.0
4,275 reviews
Search Southwest flights
  • Alaska Airlines Flights From Seattle to Philadelphia

    Alaska Airlines flies from Seattle to Philadelphia around 13 times per week, with 9,811 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Seattle to Philadelphia in the last 72 hours was $287 (round-trip), much lower than the average airfare cost of $519 for Alaska Airlines flights on this route.

  • Hawaiian Airlines Flights From Seattle to Philadelphia

    Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Seattle to Philadelphia start from as low as $327 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around $637. Hawaiian Airlines operates 13 flights to Philadelphia from Seattle in an average week. Users have rated it 7.9/10 across 2,342 reviews.


Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Rehoboth Beach
Cape May
Ocean City
Wildwood Crest
Reading
King of Prussia
Newark
Dover
North Wildwood
Cherry Hill
Dewey Beach
Lewes
Exton
Vineland
Essington
Pottstown
New Castle
Avalon
West Chester

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Philadelphia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Philadelphia. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Philadelphia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Philadelphia from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to Philadelphia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Philadelphia.

I’m not ready to book a flight from Seattle to Philadelphia right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Philadelphia, momondo offers a useful price alert feature which will track prices for flights to Philadelphia from Seattle and alert you when they change.


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