Cheap flights from Philadelphia to Seattle from $138

Round-trip
1 adult
Economy
From?
To?
Mon 5/30
Mon 6/6

Deals available from 900+ travel sites.

Flight information for Philadelphia to Seattle
(PHL to SEA)

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

Best Price Found

$138

Fastest flight time

5h 59m

Direct flights

Mon, Tue, Thu, Sat and Sun

Airports in Seattle

3 airports
The best one-way flight to Seattle from Philadelphia in the past 72 hours is $138. The best round-trip flight deal from Philadelphia to Seattle found on momondo in the last 72 hours is $276.
The fastest flight from Philadelphia to Seattle takes 5h 59m
Direct flights go from Philadelphia to Seattle on Monday, Tuesday, Thursday, Saturday and Sunday. The only airline offering direct flights is Alaska Airlines.
There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

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 from Philadelphia to Seattle?

January

The cheapest time of year to fly to Seattle from Philadelphia is January. Most expensive is June

What is the cheapest day to depart Philadelphia for Seattle?

Tuesday

The cheapest day of the week is typically Tuesday. The most expensive is typically Sunday

When is the cheapest time to fly from Philadelphia to Seattle?

in the evening

Philadelphia to Seattle flights are approximately 31% more expensive at noon than in the evening

What is the cheapest airline that flies to Seattle from Philadelphia?

Juneyao Airlines

Alaska Airlines, Delta, and Frontier are the most popular carriers operating from Philadelphia to Seattle

What is the cheapest Philadelphia to Seattle flight route?

Philadelphia - Seattle/Tacoma Intl

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

How far in advance should you book Philadelphia to Seattle flights?

48 days before

The cheapest time to buy a flight from Philadelphia to Seattle is approximately 48 days to departure

Newark Airport (EWR) to Seattle/Tacoma Intl Airport (SEA)$273
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Philadelphia Airport (PHL) to Seattle/Tacoma Intl Airport (SEA)$276
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Allentown-Bethlehem Airport (ABE) to Seattle/Tacoma Intl Airport (SEA)$391
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Atlantic City Airport (ACY) to Seattle/Tacoma Intl Airport (SEA)$800
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Trenton-Mercer Airport (TTN) to Seattle/Tacoma Intl Airport (SEA)$1,049
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When traveling from Philadelphia to Seattle, the most popular airport to fly into is Seattle/Tacoma Intl Airport. The majority of travelers flying into Seattle/Tacoma Intl Airport from Philadelphia are departing from Philadelphia Airport. When booking your trip to Seattle, it is helpful to have an alternative airport to fly out of. Good options for departure airports when traveling to Seattle, you can try Newark Airport (in Newark), Allentown-Bethlehem Airport (in Allentown), or Atlantic City Airport (in Atlantic City). When traveling from Philadelphia, it is helpful to have an alternative airport to fly into when you land in Seattle. The nearest airport to Seattle/Tacoma Intl Airport is Seattle/Tacoma Intl Airport which is located in Seattle. The least expensive flight option from Philadelphia to Seattle will typically be EWR — SEA during the month of May with an average price of $273 RT.


Easily compare round-trip flights from Philadelphia to Seattle

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Philadelphia to Seattle by changing tabs
Delta
Sep 17
PHL2:45 pmPhiladelphia
9h 08m
1 stop
SEA11:53 pmSeattle/Tacoma Intl
Sep 23
SEA8:30 pmSeattle/Tacoma Intl
7h 02m
1 stop
PHL3:32 amPhiladelphia
Multiple Airlines
Nov 9
PHL1:05 pmPhiladelphia
8h 50m
1 stop
SEA9:55 pmSeattle/Tacoma Intl
Nov 14
SEA6:59 pmSeattle/Tacoma Intl
10h 30m
1 stop
PHL5:29 amPhiladelphia
United Airlines
Sep 28
PHL4:03 amPhiladelphia
10h 53m
1 stop
SEA2:56 pmSeattle/Tacoma Intl
Oct 3
SEA7:30 pmSeattle/Tacoma Intl
9h 24m
1 stop
PHL4:54 amPhiladelphia
Alaska Airlines
Oct 29
PHL3:15 amPhiladelphia
5h 59m
SEA9:14 amSeattle/Tacoma Intl
Nov 4
SEA5:25 amSeattle/Tacoma Intl
5h 11m
PHL10:36 amPhiladelphia
American Airlines
Oct 26
PHL1:05 amPhiladelphia
7h 25m
1 stop
SEA8:30 amSeattle/Tacoma Intl
Nov 2
SEA6:50 pmSeattle/Tacoma Intl
5h 09m
PHL11:59 pmPhiladelphia
Delta
Sep 29
PHL7:32 amPhiladelphia
7h 33m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
Oct 4
SEA8:09 amSeattle/Tacoma Intl
9h 48m
1 stop
PHL5:57 pmPhiladelphia

Find the cheapest one-way flights from Philadelphia to Seattle

If you're looking for one-way flights from Philadelphia to Seattle, view some of our deals below provided by Alaska Airlines, American Airlines and Delta
Delta
Sep 14
PHL2:20 pmPhiladelphia
8h 43m
1 stop
SEA11:03 pmSeattle/Tacoma Intl
Alaska Airlines
Sep 27
PHL3:15 amPhiladelphia
5h 59m
SEA9:14 amSeattle/Tacoma Intl
American Airlines
Oct 1
PHL4:45 amPhiladelphia
6h 11m
SEA10:56 amSeattle/Tacoma Intl

Search last-minute flights to Seattle from Philadelphia

Find and compare round-trip flight prices for your last-minute flight from Philadelphia to Seattle
Multiple Airlines
Jun 3
PHL3:14 pmPhiladelphia
23h 51m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
Jun 7
SEA7:06 pmSeattle/Tacoma Intl
10h 09m
1 stop
PHL5:15 amPhiladelphia
JetBlue
Jun 2
PHL8:50 amPhiladelphia
12h 06m
1 stop
SEA8:56 pmSeattle/Tacoma Intl
Jun 7
SEA7:06 pmSeattle/Tacoma Intl
10h 09m
1 stop
PHL5:15 amPhiladelphia
Spirit Airlines
Jun 4
PHL1:30 pmPhiladelphia
44h 31m
3 stops
SEA10:01 amSeattle/Tacoma Intl
Jun 11
SEA8:27 amSeattle/Tacoma Intl
28h 24m
2 stops
PHL12:51 pmPhiladelphia
Multiple Airlines
Jun 3
PHL3:05 pmPhiladelphia
19h 14m
1 stop
SEA10:19 amSeattle/Tacoma Intl
Jun 6
SEA11:54 amSeattle/Tacoma Intl
12h 01m
1 stop
PHL11:55 pmPhiladelphia
Multiple Airlines
Jun 2
PHL5:50 pmPhiladelphia
16h 29m
1 stop
SEA10:19 amSeattle/Tacoma Intl
Jun 6
SEA11:54 amSeattle/Tacoma Intl
12h 01m
1 stop
PHL11:55 pmPhiladelphia
Spirit Airlines
Jun 3
PHL8:25 amPhiladelphia
38h 34m
3 stops
SEA10:59 pmSeattle/Tacoma Intl
Jun 7
SEA8:27 amSeattle/Tacoma Intl
32h 40m
3 stops
PHL5:07 pmPhiladelphia

Best airlines flying from Philadelphia to Seattle

Compare and see reviews for airlines that fly from Philadelphia to Seattle with momondo
AirlineRatingFree CancellationPrice
Juneyao AirlinesPriceFrom $14Free CancellationRating
0.0
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Spirit AirlinesPriceFrom $82Free CancellationRating
6.2
6.4

Boarding

5.8

Comfort

6.9

Crew

4.8

Entertainment

5.1

Food

Reviews

This was my last time flying Spirit. The savings on the prices makes since, you get what you pay for !!

1 / 10
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FrontierPriceFrom $90Free CancellationRating
6.1
6.4

Boarding

5.8

Comfort

6.9

Crew

4.7

Entertainment

5.0

Food

Reviews

Coffee ordered and only choice offered was black or with cream and sugar. A sugar substitute should be offered for those who don’t need or want sugar.

1 / 10
Search Frontier flights
Alaska AirlinesPriceFrom $147Free CancellationRating
8.0
8.3

Boarding

8.0

Comfort

8.5

Crew

7.4

Entertainment

7.2

Food

Reviews

My husband's luggage was lost even though it was checked in at the same time as mine. It was eventually located and was shipped to a municipal airport in the area where we are heading. We have yet to be able to pick up the suit case as we will be heading to the pickup location tomorrow. ( 4 days after arrival) We had to buy some new clothes and shoes for my husband in the meantime. I think I should be reimbursed for the baggage check fee. We lost time at the airport upon arrival trying to track our luggage. We lost time and money having to purchase clothes and shoes while waiting for luggage to arrive and we will lose time having to drive 2 hours out of our way to retrieve our luggage.

1 / 10
Search Alaska Airlines flights
United AirlinesPriceFrom $154Free CancellationRating
7.4
7.7

Boarding

7.2

Comfort

8.0

Crew

6.9

Entertainment

6.7

Food

Reviews

The new check in process at Newark liberty airport was so efficient. Did have a bit of a bottleneck situation at security. Flight was on time, boarding was smooth. Friendly crew.. excellent communication from pilot about nature of delays. I am slightly hard of hearing and I think due to the poor quality of headphones i had to turn it up much louder than I should have.. it made it uncomfortable. It would be great if that was a priority. Impressed with main course but don’t like quality of buns.. I much prefer bread made with wholesome unrefined flour. Very happy with biscotti and the quality of yoghurt provided for breakfast!

1 / 10
Search United Airlines flights
DeltaPriceFrom $164Free CancellationRating
7.9
7.9

Boarding

8.0

Comfort

8.3

Crew

7.7

Entertainment

7.3

Food

Reviews

One of the crew member weren’t to pleasant

1 / 10
Search Delta flights
American AirlinesPriceFrom $168Free CancellationRating
7.3
7.7

Boarding

7.2

Comfort

8.1

Crew

7.1

Entertainment

6.6

Food

Reviews

I never took this fly, I make a new reservation direct whith Spirit, I try to cancelled it

1 / 10
Search American Airlines flights
Sun Country AirPriceFrom $185Free CancellationRating
7.4
7.7

Boarding

7.4

Comfort

8.2

Crew

6.4

Entertainment

6.5

Food

Reviews

Unfriendly staff, the pilot never announced anything during the entire flight including we’re at altitude, what the weather was like at the destination how much time is left if we were ahead or behind schedule etc. Very funny gay gene flight crew.

1 / 10
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  • Alaska Airlines Flights From Philadelphia to Seattle

    Alaska Airlines flies from Philadelphia to Seattle around 9 times per week, with 402 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Philadelphia to Seattle in the last 72 hours was $147 (round-trip), much lower than the average airfare cost of $318 for Alaska Airlines flights on this route.

  • American Airlines Flights From Philadelphia to Seattle

    American Airlines (7.3/10 from 505 reviews) operates around 7 flights from Philadelphia to Seattle in any given week. The average American Airlines airfare for this route is around $435, with deals from around $168 rare but found on momondo. Referenced prices are for round-trip Philadelphia to Seattle flight searches in the last 72 hours.


Delta flights from Philadelphia to Seattle

Our best Delta deals on Philadelphia to Seattle flight tickets
Delta
Sep 17
PHL2:45 pmPhiladelphia
9h 08m
1 stop
SEA11:53 pmSeattle/Tacoma Intl
Sep 23
SEA8:30 pmSeattle/Tacoma Intl
7h 02m
1 stop
PHL3:32 amPhiladelphia
Delta
Sep 29
PHL7:32 amPhiladelphia
7h 33m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
Oct 4
SEA8:09 amSeattle/Tacoma Intl
9h 48m
1 stop
PHL5:57 pmPhiladelphia
Delta
Sep 7
PHL2:20 pmPhiladelphia
8h 43m
1 stop
SEA11:03 pmSeattle/Tacoma Intl
Sep 13
SEA8:30 pmSeattle/Tacoma Intl
7h 02m
1 stop
PHL3:32 amPhiladelphia

United Airlines flights from Philadelphia to Seattle

Our best United Airlines deals on Philadelphia to Seattle flight tickets
United Airlines
Sep 28
PHL4:03 amPhiladelphia
10h 53m
1 stop
SEA2:56 pmSeattle/Tacoma Intl
Oct 3
SEA7:30 pmSeattle/Tacoma Intl
9h 24m
1 stop
PHL4:54 amPhiladelphia
United Airlines
Oct 26
PHL4:42 amPhiladelphia
9h 31m
1 stop
SEA2:13 pmSeattle/Tacoma Intl
Nov 2
SEA7:55 pmSeattle/Tacoma Intl
7h 25m
1 stop
PHL3:20 amPhiladelphia
United Airlines
Sep 24
PHL4:03 amPhiladelphia
10h 53m
1 stop
SEA2:56 pmSeattle/Tacoma Intl
Sep 27
SEA2:30 amSeattle/Tacoma Intl
15h 00m
PHL5:30 pmPhiladelphia

  • Are airlines flying from Philadelphia to Seattle/Tacoma Intl offering flexible cancellation due to COVID-19?

    Due to the global impact of COVID-19, some of our airline partners operating flights from Philadelphia to Seattle/Tacoma Intl, such as American Airlines, Alaska Airlines, and Delta may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.

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

    The straight-line distance from Philadelphia to Seattle/Tacoma Intl is 2372.3 mi. 5h 59m is a normal flight duration for this route.



Alternative routes for Philadelphia to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Pittsburgh to Seattle Flights
Fastest flight time5h 12m
Cheapest price$226
Harrisburg to Seattle Flights
Fastest flight time7h 42m
Cheapest price$418
Allentown to Seattle Flights
Fastest flight time7h 28m
Cheapest price$391
State College to Seattle Flights
Fastest flight time9h 04m
Cheapest price$661
Philadelphia to Spokane Flights
Fastest flight time7h 35m
Cheapest price$372
Pittsburgh to Spokane Flights
Fastest flight time6h 30m
Cheapest price$392
Scranton to Seattle Flights
Fastest flight time8h 45m
Cheapest price$455
Harrisburg to Spokane Flights
Fastest flight time7h 54m
Cheapest price$777

Similar Philadelphia to Seattle flights

Flexible with your destination? Broaden your search and find flights similar to your Philadelphia to Seattle route

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