Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Philadelphia to Seattle from $72

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Seattle departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from Philadelphia to Seattle

Cheap round-trip flights

These are some of the best round-trip flight deals from Philadelphia to Seattle 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 Philadelphia to Seattle.

Cheap last minute flights

Planning a quick getaway from Philadelphia to Seattle? 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 Seattle, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Philadelphia to Seattle

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

All round-trip flight deals to Seattle

The cheapest plane tickets to Seattle found on KAYAK recently.
9:53 pm - 1:34 pmPHL-SEA
18h 41m1 stop
11:49 am - 6:21 amSEA-PHL
15h 32m1 stop
$175Frontier
Find Deal
Thu, Dec 12 - Tue, Dec 17
9:53 pm - 1:34 pmPHL-SEA
18h 41m1 stop
11:49 am - 6:21 amSEA-PHL
15h 32m1 stop
$178Frontier
Find Deal
Sun, Dec 8 - Tue, Dec 17
9:53 pm - 1:34 pmPHL-SEA
18h 41m1 stop
12:50 pm - 6:10 amSEA-PHL
14h 20m1 stop
Thu, Dec 12 - Mon, Dec 16
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
9:45 pm - 6:01 amSEA-PHL
5h 16mnonstop
$307Alaska Airlines
Find Deal
Mon, Mar 10 - Wed, Mar 19
7:00 pm - 10:21 pmPHL-SEA
6h 21mnonstop
12:15 am - 12:51 pmSEA-PHL
9h 36m1 stop
$317American Airlines
Find Deal
Wed, Dec 11 - Sat, Dec 14
6:09 pm - 12:21 amPHL-SEA
9h 12m1 stop
5:30 am - 5:34 pmSEA-PHL
9h 04m1 stop
$326Delta
Find Deal
Wed, Dec 11 - Sun, Dec 15
5:00 am - 1:04 pmPHL-SEA
11h 04m1 stop
9:45 pm - 5:40 amSEA-PHL
4h 55mnonstop
$331Alaska Airlines
Find Deal
Mon, Dec 16 - Wed, Dec 25
6:49 pm - 10:10 pmPHL-SEA
6h 21mnonstop
10:21 pm - 9:40 amSEA-PHL
8h 19m1 stop
$347American Airlines
Find Deal
Fri, Feb 14 - Mon, Feb 24
11:37 am - 4:54 pmPHL-SEA
8h 17m1 stop
11:05 pm - 12:10 pmSEA-PHL
10h 05m1 stop
$356Delta
Find Deal
Fri, Feb 14 - Mon, Feb 24
11:16 am - 5:02 pmPHL-SEA
8h 46m1 stop
11:59 pm - 11:00 amSEA-PHL
8h 01m1 stop
$370Sun Country Air
Find Deal
Wed, Dec 18 - Mon, Dec 30
9:53 pm - 2:19 pmPHL-SEA
19h 26m1 stop
$72Frontier
Find Deal
Thu, Jan 9
5:40 am - 1:10 pmPHL-SEA
10h 30m1 stop
$84Frontier
Find Deal
Tue, Dec 17
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
$139Alaska Airlines
Find Deal
Tue, Feb 18
6:00 am - 10:50 amPHL-SEA
7h 50m1 stop
$148Delta
Find Deal
Tue, Jan 21
12:15 pm - 9:20 pmPHL-SEA
12h 05m2 stops
$153United Airlines
Find Deal
Tue, Jan 21
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
$169Alaska Airlines
Find Deal
Thu, Jan 23
11:37 am - 4:54 pmPHL-SEA
8h 17m1 stop
$178Delta
Find Deal
Mon, Jan 6
6:30 pm - 9:41 pmPHL-SEA
6h 11mnonstop
$184American Airlines
Find Deal
Thu, Apr 17
7:00 pm - 10:21 pmPHL-SEA
6h 21mnonstop
$189American Airlines
Find Deal
Tue, Dec 10
12:15 pm - 9:20 pmPHL-SEA
12h 05m2 stops
$203United Airlines
Find Deal
Wed, Jan 8
8:35 pm - 8:19 amPHL-SEA
14h 44m1 stop
9:40 pm - 5:31 amSEA-PHL
28h 51m1 stop
$352Frontier
Find Deal
Sat, Nov 23 - Wed, Nov 27
8:35 pm - 8:19 amPHL-SEA
14h 44m1 stop
9:40 pm - 5:31 amSEA-PHL
28h 51m1 stop
$355Frontier
Find Deal
Mon, Nov 25 - Wed, Nov 27
6:46 pm - 10:05 pmPHL-SEA
6h 19mnonstop
5:47 pm - 5:15 amSEA-PHL
8h 28m1 stop
$582American Airlines
Find Deal
Tue, Nov 26 - Mon, Dec 2
6:35 pm - 12:15 amPHL-SEA
8h 40m1 stop
12:55 am - 10:39 amSEA-PHL
6h 44m1 stop
$626Delta
Find Deal
Tue, Nov 26 - Sun, Dec 1
7:00 am - 10:05 amPHL-SEA
6h 05mnonstop
9:35 pm - 5:30 amSEA-PHL
4h 55mnonstop
$642Alaska Airlines
Find Deal
Tue, Nov 26 - Mon, Dec 2
6:46 pm - 10:05 pmPHL-SEA
6h 19mnonstop
1:16 am - 12:32 pmSEA-PHL
8h 16m1 stop
$692American Airlines
Find Deal
Tue, Nov 26 - Sun, Dec 1
4:37 pm - 12:19 amPHL-SEA
10h 42m1 stop
5:30 am - 5:54 pmSEA-PHL
9h 24m1 stop
$706Delta
Find Deal
Fri, Nov 22 - Thu, Nov 28
7:00 am - 10:05 amPHL-SEA
6h 05mnonstop
9:40 pm - 5:45 amSEA-PHL
5h 05mnonstop
$877Alaska Airlines
Find Deal
Fri, Nov 22 - Wed, Dec 4
12:15 pm - 6:54 pmPHL-SEA
9h 39m1 stop
12:55 pm - 5:26 amSEA-PHL
13h 31m2 stops
$1,671United Airlines
Find Deal
Sun, Nov 24 - Tue, Nov 26
10:30 am - 6:54 pmPHL-SEA
11h 24m2 stops
10:36 pm - 1:50 pmSEA-PHL
12h 14m2 stops
$1,676United Airlines
Find Deal
Sun, Nov 24 - Tue, Nov 26
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
9:15 am - 5:25 pmSEA-PHL
5h 10mnonstop
$287Alaska Airlines
Find Deal
Sat, Mar 8 - Tue, Mar 11
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
9:45 pm - 6:01 amSEA-PHL
5h 16mnonstop
$307Alaska Airlines
Find Deal
Mon, Mar 10 - Wed, Mar 19
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
$317Alaska Airlines
Find Deal
Tue, Jan 28 - Fri, Jan 31
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
9:15 am - 5:25 pmSEA-PHL
5h 10mnonstop
$337Alaska Airlines
Find Deal
Thu, Feb 13 - Mon, Feb 17
6:32 pm - 9:55 pmPHL-SEA
6h 23mnonstop
9:15 am - 5:32 pmSEA-PHL
5h 17mnonstop
$347Alaska Airlines
Find Deal
Thu, Jan 16 - Wed, Jan 22
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
9:45 pm - 6:01 amSEA-PHL
5h 16mnonstop
$352Alaska Airlines
Find Deal
Mon, Mar 17 - Thu, Mar 27
6:35 pm - 9:47 pmPHL-SEA
6h 12mnonstop
9:45 pm - 6:01 amSEA-PHL
5h 16mnonstop
$367Alaska Airlines
Find Deal
Thu, Apr 10 - Thu, Apr 17
6:25 pm - 9:51 pmPHL-SEA
6h 26mnonstop
9:15 am - 5:25 pmSEA-PHL
5h 10mnonstop
$372Alaska Airlines
Find Deal
Sat, Mar 8 - Sun, Mar 9
6:49 pm - 10:10 pmPHL-SEA
6h 21mnonstop
11:10 pm - 7:03 amSEA-PHL
4h 53mnonstop
$387American Airlines
Find Deal
Mon, Feb 17 - Fri, Feb 21
6:30 pm - 9:46 pmPHL-SEA
6h 16mnonstop
11:42 pm - 7:40 amSEA-PHL
4h 58mnonstop
$407American Airlines
Find Deal
Sat, Mar 8 - Sat, Mar 15

Frontier flights from Philadelphia to Seattle

Our best Frontier deals on Philadelphia to Seattle flight tickets
Frontier
Dec 12
PHL9:53 pmPhiladelphia
18h 41m
1 stop
SEA1:34 pmSeattle/Tacoma Intl
Dec 17
SEA11:49 amSeattle/Tacoma Intl
15h 32m
1 stop
PHL6:21 amPhiladelphia
Frontier
Dec 8
PHL9:53 pmPhiladelphia
18h 41m
1 stop
SEA1:34 pmSeattle/Tacoma Intl
Dec 17
SEA11:49 amSeattle/Tacoma Intl
15h 32m
1 stop
PHL6:21 amPhiladelphia
Frontier
Dec 25
PHL6:40 amPhiladelphia
9h 30m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
Jan 1
SEA5:40 pmSeattle/Tacoma Intl
14h 07m
1 stop
PHL10:47 amPhiladelphia

Spirit Airlines flights from Philadelphia to Seattle

Our best Spirit Airlines deals on Philadelphia to Seattle flight tickets
Spirit Airlines
Dec 13
PHL7:15 amPhiladelphia
16h 11m
1 stop
SEA8:26 pmSeattle/Tacoma Intl
Dec 16
SEA9:21 pmSeattle/Tacoma Intl
19h 51m
2 stops
PHL8:12 pmPhiladelphia
Spirit Airlines
Dec 13
PHL7:15 amPhiladelphia
16h 11m
1 stop
SEA8:26 pmSeattle/Tacoma Intl
Dec 15
SEA12:50 pmSeattle/Tacoma Intl
22h 30m
2 stops
PHL2:20 pmPhiladelphia
Spirit Airlines
May 8
PHL10:50 pmPhiladelphia
27h 20m
1 stop
SEA11:10 pmSeattle/Tacoma Intl
May 16
SEA6:00 amSeattle/Tacoma Intl
29h 16m
1 stop
PHL2:16 pmPhiladelphia

See travel insights to Seattle from

How to get the cheapest flight ticket from Philadelphia to Seattle

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 Seattle?

In general, February is the cheapest month to fly from Philadelphia to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $336. If you don’t want to visit Seattle in February, then you should wait until April to fly from Philadelphia, when ticket prices are also cheap, with an average price of $361.

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

On average, the least expensive day to fly to Seattle from Philadelphia is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $431. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from Philadelphia because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $486.

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

Flying to Seattle from Philadelphia at noon is the least expensive time of day to depart. momondo users have found prices as low as $419 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $486. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to Seattle from Philadelphia when booking 34 days ahead of your departure date. In general, you can expect to find flights to Seattle for around $426 when searching 34 days out. Keep in mind that you might be able to find cheaper flights to Seattle at any time. In fact, our users found flights for as low as $342 in the past 72 hours.

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

There are 4 cabin classes available to choose from on Philadelphia to Seattle/Tacoma Intl 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 Philadelphia to Seattle flights?

You could potentially save up to 48% on your flight if you consider stops on a Philadelphia to Seattle flight.

How have Philadelphia to Seattle flight prices changed over time?

As of November 2024, prices for Philadelphia to Seattle flights are approximately 9% cheaper when compared to flights at the same time last year.

When to book flights from Philadelphia to Seattle

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

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

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

Best Price Found

$72

Fastest flight time

6h 10m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Philadelphia in the past 72 hours is $72. The best round-trip flight deal from Philadelphia to Seattle found on momondo in the last 72 hours is $175.
The fastest flight from Philadelphia to Seattle takes 6h 10m
Direct flights go from Philadelphia to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

    The straight-line distance from Philadelphia to Seattle/Tacoma Intl is 2372.3 mi. 6h 10m is a normal flight duration for this route.

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

    Prices for flights from Philadelphia Airport to Seattle/Tacoma Intl Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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


Best airlines flying from Philadelphia to Seattle

Compare and see reviews for airlines that fly from Philadelphia to Seattle with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $125Free CancellationRating
7.4
3,389 reviews
Search JetBlue flights
FrontierPriceFrom $138Free CancellationRating
6.1
3,536 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $162Free CancellationRating
6.3
8,169 reviews
Search Spirit Airlines flights
Sun Country AirPriceFrom $199Free CancellationRating
7.0
415 reviews
Search Sun Country Air flights
DeltaPriceFrom $259Free CancellationRating
8.0
8,755 reviews
Search Delta flights
Alaska AirlinesPriceFrom $273Free CancellationRating
8.0
9,464 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $276Free CancellationRating
8.1
5,005 reviews
Search Southwest flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights
American AirlinesPriceFrom $301Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
  • Alaska Airlines Flights From Philadelphia to Seattle

    Alaska Airlines flies from Philadelphia to Seattle around 2 times per week, with 9,464 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Philadelphia to Seattle in the last 72 hours was $273 (round-trip), much lower than the average airfare cost of $460 for Alaska Airlines flights on this route.

  • American Airlines Flights From Philadelphia to Seattle

    American Airlines (7.2/10 from 10,000 reviews) operates around 6 flights from Philadelphia to Seattle in any given week. The average American Airlines airfare for this route is around $486, with deals from around $301 rare but found on momondo. Referenced prices are for round-trip Philadelphia to Seattle flight searches in the last 72 hours.


Why use momondo?

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

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

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

Yes. All flights to Seattle from Philadelphia on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Seattle from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Philadelphia to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Tue 11/26
Tue 12/3
Email me momondo's favorite deals

Find better results for your trip to the United States