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Cheap flights from Seattle to Philadelphia from $87

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 2/12. 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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Find the cheapest flights from Seattle to Philadelphia

Cheap round-trip flights

These are some of the best round-trip flight deals from Seattle to Philadelphia that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Seattle to Philadelphia.

Cheap last minute flights

Planning a quick getaway from Seattle to Philadelphia? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Philadelphia, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Seattle to Philadelphia

Find recent round-trip train or bus tickets from Seattle to Philadelphia.

All round-trip flight deals to Philadelphia

The cheapest plane tickets to Philadelphia found on KAYAK recently.
1:36 pm - 11:39 amSEA-PHL
19h 03m1 stop
7:45 am - 9:35 amPHL-SEA
28h 50m1 stop
$145Frontier
Find Deal
Wed, Feb 12 - Wed, Feb 26
7:43 pm - 2:49 pmSEA-PHL
16h 06m1 stop
7:45 am - 9:35 amPHL-SEA
28h 50m1 stop
Mon, Feb 24 - Wed, Feb 26
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
$277Alaska Airlines
Find Deal
Wed, Jan 15 - Tue, Jan 21
9:29 pm - 5:44 amSEA-PHL
5h 15mnonstop
7:04 am - 9:59 amPHL-SEA
5h 55mnonstop
$287Alaska Airlines
Find Deal
Sat, May 3 - Wed, May 7
11:05 pm - 12:05 pmSEA-PHL
10h 00m1 stop
5:15 pm - 10:55 pmPHL-SEA
8h 40m1 stop
$296Delta
Find Deal
Sat, Jan 25 - Sat, Feb 1
7:00 am - 5:35 pmSEA-PHL
7h 35m1 stop
10:10 am - 7:08 pmPHL-SEA
11h 58m2 stops
$301United Airlines
Find Deal
Sat, Feb 1 - Tue, Feb 4
6:15 am - 5:02 pmSEA-PHL
7h 47m1 stop
6:00 am - 10:45 amPHL-SEA
7h 45m1 stop
$306Delta
Find Deal
Wed, Jan 8 - Sat, Jan 18
12:43 am - 12:35 pmSEA-PHL
8h 52m1 stop
6:49 pm - 10:09 pmPHL-SEA
6h 20mnonstop
$347American Airlines
Find Deal
Wed, Feb 12 - Mon, Feb 17
12:45 am - 12:36 pmSEA-PHL
8h 51m1 stop
6:49 pm - 10:09 pmPHL-SEA
6h 20mnonstop
$348American Airlines
Find Deal
Wed, Feb 5 - Thu, Feb 13
5:00 am - 5:35 pmSEA-PHL
9h 35m2 stops
5:10 pm - 10:53 pmPHL-SEA
8h 43m1 stop
$361United Airlines
Find Deal
Sun, Jan 19 - Thu, Jan 23
1:36 pm - 11:39 amSEA-PHL
19h 03m1 stop
$87Frontier
Find Deal
Wed, Feb 12
5:45 am - 12:25 amSEA-PHL
15h 40m1 stop
$101Spirit Airlines
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Mon, Jan 13
9:54 pm - 6:00 amSEA-PHL
5h 06mnonstop
$139Alaska Airlines
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Tue, Mar 25
11:05 pm - 8:48 amSEA-PHL
6h 43m1 stop
$148Delta
Find Deal
Sat, Jan 18
8:30 am - 4:41 pmSEA-PHL
5h 11mnonstop
$149Alaska Airlines
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Sat, Mar 22
11:15 pm - 9:41 amSEA-PHL
7h 26m1 stop
$153United Airlines
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Tue, Dec 31
1:30 pm - 11:20 pmSEA-PHL
6h 50m1 stop
$158Delta
Find Deal
Wed, Jan 8
5:45 pm - 6:06 amSEA-PHL
9h 21m1 stop
$178American Airlines
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Sun, Jan 12
12:45 am - 12:36 pmSEA-PHL
8h 51m1 stop
$183American Airlines
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Wed, Jan 8
5:02 am - 5:25 pmSEA-PHL
9h 23m2 stops
$203United Airlines
Find Deal
Tue, Feb 25
9:36 pm - 5:09 amSEA-PHL
28h 33m1 stop
8:29 am - 1:11 pmPHL-SEA
31h 42m1 stop
Wed, Dec 25 - Tue, Jan 7
9:36 pm - 5:09 amSEA-PHL
28h 33m1 stop
8:29 am - 1:11 pmPHL-SEA
31h 42m1 stop
Wed, Dec 25 - Sun, Jan 5
9:36 pm - 5:09 amSEA-PHL
28h 33m1 stop
6:40 am - 1:10 pmPHL-SEA
9h 30m1 stop
$438Frontier
Find Deal
Thu, Dec 26 - Wed, Jan 1
9:36 pm - 5:09 amSEA-PHL
28h 33m1 stop
7:30 am - 6:01 pmPHL-SEA
13h 31m1 stop
$576Frontier
Find Deal
Wed, Dec 25 - Tue, Dec 31
6:00 am - 11:14 pmSEA-PHL
14h 14m1 stop
6:55 am - 12:25 pmPHL-SEA
8h 30m1 stop
$626Delta
Find Deal
Wed, Dec 25 - Wed, Jan 8
6:10 am - 11:14 pmSEA-PHL
14h 04m2 stops
6:55 am - 12:25 pmPHL-SEA
8h 30m1 stop
$631Delta
Find Deal
Wed, Dec 25 - Wed, Jan 8
12:31 am - 1:01 pmSEA-PHL
9h 30m1 stop
3:55 pm - 11:31 pmPHL-SEA
10h 36m1 stop
$766American Airlines
Find Deal
Thu, Dec 26 - Tue, Jan 7
9:29 am - 5:41 pmSEA-PHL
5h 12mnonstop
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
$777Alaska Airlines
Find Deal
Tue, Dec 24 - Tue, Jan 7
11:10 pm - 7:17 amSEA-PHL
5h 07mnonstop
6:25 am - 12:49 pmPHL-SEA
9h 24m1 stop
$833American Airlines
Find Deal
Fri, Dec 27 - Wed, Jan 1
9:29 am - 5:41 pmSEA-PHL
5h 12mnonstop
7:00 am - 10:27 amPHL-SEA
6h 27mnonstop
$877Alaska Airlines
Find Deal
Tue, Dec 24 - Sun, Dec 29
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
$277Alaska Airlines
Find Deal
Wed, Jan 15 - Tue, Jan 21
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
$292Alaska Airlines
Find Deal
Wed, Feb 5 - Wed, Feb 12
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
$297Alaska Airlines
Find Deal
Wed, Feb 5 - Wed, Feb 12
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
$307Alaska Airlines
Find Deal
Tue, Jan 28 - Fri, Jan 31
9:15 am - 5:25 pmSEA-PHL
5h 10mnonstop
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
$317Alaska Airlines
Find Deal
Wed, Feb 19 - Mon, Feb 24
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
$334Alaska Airlines
Find Deal
Thu, Feb 6 - Thu, Feb 13
9:15 am - 5:25 pmSEA-PHL
5h 10mnonstop
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
$336Alaska Airlines
Find Deal
Thu, Feb 20 - Mon, Feb 24
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
$337Alaska Airlines
Find Deal
Thu, Feb 6 - Thu, Feb 13
11:10 pm - 7:03 amSEA-PHL
4h 53mnonstop
6:49 pm - 10:09 pmPHL-SEA
6h 20mnonstop
$340American Airlines
Find Deal
Mon, Feb 24 - Thu, Feb 27
11:28 pm - 7:40 amSEA-PHL
5h 12mnonstop
6:30 pm - 9:35 pmPHL-SEA
6h 05mnonstop
$417American Airlines
Find Deal
Thu, May 29 - Mon, Jun 2

Frontier flights from Seattle to Philadelphia

Our best Frontier deals on Seattle to Philadelphia flight tickets
Frontier
Feb 12
SEA1:36 pmSeattle/Tacoma Intl
19h 03m
1 stop
PHL11:39 amPhiladelphia
Feb 26
PHL7:45 amPhiladelphia
28h 50m
1 stop
SEA9:35 amSeattle/Tacoma Intl
Frontier
Mar 4
SEA3:48 pmSeattle/Tacoma Intl
11h 26m
1 stop
PHL6:14 amPhiladelphia
Mar 10
PHL6:40 amPhiladelphia
8h 22m
1 stop
SEA12:02 pmSeattle/Tacoma Intl
Frontier
Mar 25
SEA11:48 amSeattle/Tacoma Intl
15h 26m
1 stop
PHL6:14 amPhiladelphia
Mar 29
PHL7:10 amPhiladelphia
29h 20m
1 stop
SEA9:30 amSeattle/Tacoma Intl

American Airlines flights from Seattle to Philadelphia

Our best American Airlines deals on Seattle to Philadelphia flight tickets
American Airlines
Feb 12
SEA12:43 amSeattle/Tacoma Intl
8h 52m
1 stop
PHL12:35 pmPhiladelphia
Feb 17
PHL6:49 pmPhiladelphia
6h 20m
SEA10:09 pmSeattle/Tacoma Intl
American Airlines
Feb 5
SEA12:45 amSeattle/Tacoma Intl
8h 51m
1 stop
PHL12:36 pmPhiladelphia
Feb 13
PHL6:49 pmPhiladelphia
6h 20m
SEA10:09 pmSeattle/Tacoma Intl
American Airlines
Feb 5
SEA12:45 amSeattle/Tacoma Intl
8h 51m
1 stop
PHL12:36 pmPhiladelphia
Feb 13
PHL6:49 pmPhiladelphia
6h 20m
SEA10:09 pmSeattle/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 February. Flight prices, which tend to average around $348, are often lower during this time because this is during the off-season. The month of March is another great option to travel to Philadelphia, with average flight prices from Seattle averaging around $368.

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

The cheapest day to depart from Seattle to Philadelphia is on a Wednesday. Travelers who choose to depart for Philadelphia on a Wednesday will often find tickets for as low as $426. 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 $571.

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 in the afternoon. momondo users have found flights departing from Seattle to Philadelphia in the afternoon for as low as $274. 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 morning when prices are around $502.

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?

Most flyers found that booking tickets 38 days in advance of their planned departure date is the best time to get cheap flights to Philadelphia. During this timeframe, flight prices are around $441. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Seattle for as low as $339 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.

Can stopping save me money on Seattle to Philadelphia flights?

You could potentially save up to 37% on your flight if you consider stops on a Seattle to Philadelphia flight.

How have Seattle to Philadelphia flight prices changed over time?

As of December 2024, prices for Seattle to Philadelphia flights are approximately 33% 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

$87

Fastest flight time

4h 55m

Direct flights

Every day

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from Seattle in the past 72 hours is $87. The best round-trip flight deal from Seattle to Philadelphia found on momondo in the last 72 hours is $145.
The fastest flight from Seattle to Philadelphia takes 4h 55m
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 01m 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
8,113 reviews
Search Spirit Airlines flights
FrontierPriceFrom $128Free CancellationRating
6.1
3,469 reviews
Search Frontier flights
Sun Country AirPriceFrom $220Free CancellationRating
7.0
392 reviews
Search Sun Country Air flights
DeltaPriceFrom $223Free CancellationRating
8.0
8,588 reviews
Search Delta flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
9,020 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $274Free CancellationRating
8.0
9,549 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $295Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $336Free CancellationRating
8.1
4,780 reviews
Search Southwest flights
  • Alaska Airlines Flights From Seattle to Philadelphia

    Alaska Airlines flies from Seattle to Philadelphia around 11 times per week, with 9,555 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Seattle to Philadelphia in the last 72 hours was $274 (round-trip), much lower than the average airfare cost of $489 for Alaska Airlines flights on this route.

  • United Airlines Flights From Seattle to Philadelphia

    United Airlines is also a popular choice for this route. United Airlines flight deals for Seattle to Philadelphia start from as low as $256 round-trip, depending on your selected dates, with average United Airlines deals seen on momondo around $531. United Airlines operates 4 flights to Philadelphia from Seattle in an average week. Users have rated it 7.4/10 across 9,022 reviews.


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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