Seattle

$154+ Cheap flights from Philadelphia to Seattle (PHL - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Jan 25 — Feb 11
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The best prices from Philadelphia to Seattle/Tacoma Intl are usually found in February or April, booked 63 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Philadelphia to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$307
(Mytrip)

One-way from

$155
(Cheapflightsfares)

Popular in

July

Cheapest in

February

Average price

$441
Provider with most accurate pricing for Philadelphia-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for Philadelphia-Seattle/Tacoma Intl flights.
From Philadelphia to Seattle/Tacoma Intl
One-way flight from Philadelphia to Seattle/Tacoma Intl
High demand for flights, 15% potential price rise
Best time to find cheap flights, 2% potential price drop
Average for round-trip flights in January 2025

Find flight deals from Philadelphia to Seattle

Cheapest flights from Philadelphia to Seattle
Explore the most affordable flight options available from Philadelphia to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2025.

This Mytrip deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/147:30 pmPHL - SEA
1 stop19h 16mSpirit Airlines
Sun 3/167:57 pmSEA - PHL
2 stops30h 47mSpirit Airlines
Deal found 1/19$307
This American Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/266:48 pmPHL - SEA
Nonstop6h 17mAmerican Airlines
Tue 4/112:59 amSEA - PHL
1 stop7h 52mAmerican Airlines
Deal found 1/20$317
This Frontier deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/76:40 amPHL - SEA
1 stop8h 16mFrontier
Thu 4/101:56 pmSEA - PHL
1 stop12h 33mFrontier
Deal found 1/19$320
This Cheapflightsfares deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/612:05 pmPHL - SEA
1 stop13h 45mSun Country Air
Sun 6/1511:59 pmSEA - PHL
1 stop8h 11mSun Country Air
Deal found 1/20$324
This Booking.com deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/410:08 pmPHL - SEA
1 stop13h 35mMultiple Airlines
Mon 4/711:36 amSEA - PHL
1 stop16h 11mMultiple Airlines
Deal found 1/19$325
This Alaska Airlines deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/186:25 pmPHL - SEA
Nonstop6h 26mAlaska Airlines
Sat 3/228:30 amSEA - PHL
Nonstop5h 11mAlaska Airlines
Deal found 1/18$327
This Southwest deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/95:20 pmPHL - SEA
1 stop9h 05mSouthwest
Tue 4/157:35 amSEA - PHL
2 stops11h 35mSouthwest
Deal found 1/18$392
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/810:43 amPHL - SEA
2 stops15h 10mUnited Airlines
Wed 4/97:17 pmSEA - PHL
1 stop7h 18mUnited Airlines
Deal found 1/19$402
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/236:55 pmPHL - SEA
1 stop8h 14mDelta
Wed 3/265:30 amSEA - PHL
1 stop9h 10mDelta
Deal found 1/19$417

Find flights from Philadelphia to Seattle within your budget

Customize your flight search to find flights from Philadelphia to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 20, 2025.

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Fly to

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Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 3/14

7:30 pm-11:46 am

1 stop19h 16m

Seattle/Tacoma Intl

Sun 3/16

7:57 pm-5:44 am

2 stops30h 47m

$307

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 3/26

12:35 pm-7:08 pm

1 stop9h 33m

Seattle/Tacoma Intl

Wed 4/2

11:14 pm-7:15 am

Nonstop5h 01m

$317

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 4/7

6:40 am-11:56 am

1 stop8h 16m

Seattle/Tacoma Intl

Thu 4/10

1:56 pm-5:29 am

1 stop12h 33m

$320

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 6/6

12:05 pm-10:50 pm

1 stop13h 45m

Seattle/Tacoma Intl

Sun 6/15

11:59 pm-11:10 am

1 stop8h 11m

$324

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Fri 4/4

10:08 pm-8:43 am

1 stop13h 35m

Seattle/Tacoma Intl

Mon 4/7

11:36 am-6:47 am

1 stop16h 11m

$325

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 3/18

6:00 am-10:42 am

1 stop7h 42m

Seattle/Tacoma Intl

Fri 3/21

6:56 pm-5:45 am

1 stop7h 49m

$327

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 3/27

7:20 am-10:20 am

Nonstop6h 00m

Seattle/Tacoma Intl

Sun 3/30

9:54 pm-6:00 am

Nonstop5h 06m

$367

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 5/29

6:30 am-12:51 pm

Nonstop9h 21m

Seattle/Tacoma Intl

Mon 6/9

11:50 pm-10:37 am

1 stop7h 47m

$381

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 4/9

5:20 pm-11:25 pm

1 stop9h 05m

Seattle/Tacoma Intl

Mon 4/14

7:25 am-10:45 pm

2 stops12h 20m

$392

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 4/23

3:10 pm-11:00 pm

2 stops10h 50m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 19 results
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Compare providers for flights from Philadelphia to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Seattle in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy2 starsTrust Score*2 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Philadelphia to Seattle

Get recent, data-driven insights about flights from Philadelphia to Seattle including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Philadelphia to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Seattle. Price data was last updated on January 17, 2025.

The best time to book flights from Philadelphia to Seattle is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Philadelphia to Seattle?

Currently, January is the cheapest month in which you can book a flight from Philadelphia to Seattle (average of $238). Flying from Philadelphia to Seattle in July is currently the most expensive (average of $411). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to SEA?

Find hourly flight availability from Philadelphia to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 20, 2025.

One of the essential ways to save on airfare from Philadelphia to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 15% on airfare.

What is the cheapest day to fly from Philadelphia to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to Seattle flight should consider departing on Tuesday at noon when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated January 20, 2025.
Read through reviews of airlines operating flights from Philadelphia to Seattle, such as Spirit Airlines, American Airlines and Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.1
Very good
4,659 reviews
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.0
Very good
9,696 reviews
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

8.0
Very good
8,521 reviews
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

7.4
Good
3,201 reviews
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

7.4
Good
8,982 reviews
8.1
Very good
4,659 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports do I use to fly from Philadelphia to Seattle?

    Booking a flight from Philadelphia (PHL) to Seattle/Tacoma Intl (SEA) is your only option if you wish to fly from Philadelphia to Seattle. On a typical day, there is 1 flight from Philadelphia to Seattle/Tacoma Intl, all of which are around 5h 56m for a nonstop flight. You can also purchase a plane ticket from 9 airlines when you book a flight from Philadelphia to Seattle.

  • How popular is this Philadelphia to Seattle flight route?

  • What are the cheapest airlines flying from Philadelphia to Seattle round-trip?

    According to our current data, Spirit Airlines ($307), American Airlines ($317), and Frontier ($320) offers the cheapest pricing from Philadelphia to Seattle. These flights start at 29% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to Seattle one-way?

    One-way options have recently been found by users for as low as $155 on Spirit Airlines. Other airlines that offer cheap prices include Frontier from $157 and Alaska Airlines from $169 one-way.

  • What are the most reliable airlines from Philadelphia to Seattle?

    Consider Hawaiian Airlines (73%), American Airlines (72%) or Qatar Airways (71%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to Seattle.

  • What are the cheapest flights from Philadelphia to Seattle?

    While on average a flight from Philadelphia to Seattle is generally $937, our data shows the cheapest flight currently is $148. When looking at the most popular route, (Philadelphia - Seattle/Tacoma Intl), you can expect to pay $140 for that flight.

  • Where are the most common layover locations when flying from Philadelphia to Seattle?

  • What are some popular things to do or see while on a layover in Minneapolis?

    Minneapolis Armory, Orpheum Theatre, and State Theatre are the most popular attractions in Minneapolis if you're in need of something to do during your layover. Those on a layover in Minneapolis interested in visiting Minneapolis Armory, Orpheum Theatre, or State Theatre can do so by traveling 6.9 mi, 7.3 mi, and 7.3 mi, respectively from Minneapolis St Paul. Travelers in need of a car in Minneapolis can rent one for about $52 per day.

  • What are some popular points of interest to see during a layover in Denver?

    Most Denver visitors opt to spend their time at Coors Field, 16th Street Mall, and Paramount Theatre. Coors Field, 16th Street Mall and Paramount Theatre are located about 18.4 mi, 18.7 mi, and 18.6 mi, respectively from Denver Intl if you are interested in checking them out. Those looking to explore during their layover in Denver can rent a car from Denver Intl for about $52 per day.

  • Where are the least popular layover locations for Philadelphia to Seattle flights?

  • Can I find deals for flights from Philadelphia to Seattle that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Seattle.

  • Can I find deals for business class flights from Philadelphia to Seattle?

    Yes. Cheapflights offers flight deals from Philadelphia to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Philadelphia to Seattle (average of $238). Flying from Philadelphia to Seattle in July is currently the most expensive (average of $411). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
SeaTac
Tukwila
Renton
Tacoma
Lacey
Federal Way
Ocean Shores
Leavenworth
Olympia
Marysville
Centralia
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Philadelphia to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from Philadelphia to Seattle

Discover the top 9 airlines that operate flights from Philadelphia to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$125Average$261FlexibilityNo cancel feeOn-time62%
FrontierCheapest$137Average$252FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$162Average$255FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$199Average$312FlexibilityNo cancel feeOn-time83%
DeltaCheapest$269Average$391FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$277Average$468FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$505FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$308Average$489FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$327Average$491FlexibilityNo cancel feeOn-time63%
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