HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$134+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Seattle with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Philadelphia to Seattle/Tacoma Intl are usually found in February or April, booked 34 days in advance, depart on a Wednesday or Tuesday 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 November 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

July

Cheapest in

February

Round-trip from

$287
(FlightHub)

One-way from

$134
(Cheapflightsfares)
Provider with most accurate pricing for Philadelphia-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Seattle/Tacoma Intl flights.
Search Deals
High demand for flights, 19% potential price rise
Search Deals
Best time to find cheap flights, 21% potential price drop
Search Deals
From Philadelphia to Seattle/Tacoma Intl
Search Deals
One-way flight from Philadelphia to Seattle/Tacoma Intl
Search Deals

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 November 20, 2024.

This CheapOair deal was found by Cheapflights users on 11/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/198:29 amPHL - SEA
1 stop14h 57mSpirit Airlines
Wed 1/82:16 pmSEA - PHL
1 stop20h 26mSpirit Airlines
Deal found 11/19$288
This CheapOair deal was found by Cheapflights users on 11/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/159:53 pmPHL - SEA
1 stop18h 41mFrontier
Sat 12/289:36 pmSEA - PHL
1 stop28h 33mFrontier
Deal found 11/20$291
This FlightHub deal was found by Cheapflights users on 11/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1810:04 pmPHL - SEA
1 stop29h 06mMultiple Airlines
Fri 1/39:36 pmSEA - PHL
1 stop28h 33mMultiple Airlines
Deal found 11/19$294
This American Airlines deal was found by Cheapflights users on 11/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/117:00 pmPHL - SEA
Nonstop6h 21mAmerican Airlines
Thu 12/125:45 pmSEA - PHL
1 stop8h 41mAmerican Airlines
Deal found 11/19$317
This Delta deal was found by Cheapflights users on 11/19. 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.
Wed 12/116:00 amPHL - SEA
1 stop7h 43mDelta
Thu 12/127:15 amSEA - PHL
1 stop7h 19mDelta
Deal found 11/19$326
This United Airlines deal was found by Cheapflights users on 11/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/286:32 amPHL - SEA
2 stops12h 01mUnited Airlines
Sun 1/57:10 pmSEA - PHL
1 stop7h 23mUnited Airlines
Deal found 11/20$332
This Alaska Airlines deal was found by Cheapflights users on 11/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/146:50 pmPHL - SEA
Nonstop6h 10mAlaska Airlines
Mon 12/309:45 pmSEA - PHL
Nonstop4h 55mAlaska Airlines
Deal found 11/20$402
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1912:36 pmPHL - SEA
1 stop13h 07mSun Country Air
Tue 12/316:34 pmSEA - PHL
1 stop13h 52mSun Country Air
Deal found 11/18$468

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 1/7

8:29 am-1:11 pm

1 stop31h 42m

Seattle/Tacoma Intl

Mon 1/13

5:30 am-11:40 pm

1 stop15h 10m

$287

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sun 12/15

9:53 pm-1:34 pm

1 stop18h 41m

Seattle/Tacoma Intl

Sat 12/28

9:36 pm-5:09 am

1 stop28h 33m

$291

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Tue 2/11

6:32 pm-9:55 pm

Nonstop6h 23m

Seattle/Tacoma Intl

Sat 2/15

3:03 pm-6:14 am

1 stop12h 11m

$293

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 1/25

8:05 am-2:18 pm

1 stop9h 13m

Seattle/Tacoma Intl

Tue 2/4

1:30 pm-11:55 pm

1 stop7h 25m

$296

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Mon 3/10

6:25 pm-9:51 pm

Nonstop6h 26m

Seattle/Tacoma Intl

Wed 3/19

9:45 pm-6:01 am

Nonstop5h 16m

$307

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 12/11

7:00 pm-10:21 pm

Nonstop6h 21m

Seattle/Tacoma Intl

Thu 12/12

5:45 pm-5:26 am

1 stop8h 41m

$317

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Thu 3/13

4:45 pm-1:06 am

1 stop11h 21m

Seattle/Tacoma Intl

Tue 3/18

7:10 pm-5:30 am

1 stop7h 20m

$322

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 1/18

2:05 pm-9:25 pm

2 stops10h 20m

Seattle/Tacoma Intl

Wed 1/22

9:10 am-11:15 pm

2 stops11h 05m

$366

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Sat 12/7

7:15 am-2:53 pm

1 stop10h 38m

$134

PhiladelphiaSeattle

PHL - SEA

PHLSEA

Philadelphia

Wed 2/19

12:55 pm-10:07 pm

1 stop12h 12m

$142

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 18 results
1
2

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy2 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
MytripPrice 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 November 15, 2024.

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 November 20, 2024.

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 14% 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 November 18, 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 November 20, 2024.
Read through reviews of airlines operating flights from Philadelphia to Seattle, such as Spirit Airlines, Frontier and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

JetBlue
7.5
Good
3,394 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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 are 3 flights from Philadelphia to Seattle/Tacoma Intl, all of which are around 6h 03m for a nonstop flight. You can also purchase a plane ticket from 10 airlines when you book a flight from Philadelphia to Seattle.

  • How popular is this Philadelphia to Seattle flight route?

    Flights from Philadelphia to Seattle/Tacoma Intl have been viewed 26 times in the past calendar month.

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

    According to our current data, Spirit Airlines ($287), Frontier ($291), and Delta ($296) offers the cheapest pricing from Philadelphia to Seattle. These flights start at 32% 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 $134 on Spirit Airlines. Other airlines that offer cheap prices include JetBlue from $142 and Delta from $148 one-way.

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

    Consider Air Tahiti Nui (93%), Hawaiian Airlines (81%) or Alaska Airlines (77%) 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 $917, our data shows the cheapest flight currently is $143. When looking at the most popular route, (Philadelphia - Seattle/Tacoma Intl), you can expect to pay $205 for that flight.

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

    Philadelphia to Seattle flights have a layover in Minneapolis most often. Denver sees the second most layovers for non-direct flights 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 $57 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 $60 per day.

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

    Flights departing from Philadelphia and landing in Seattle layover in Salt Lake City least frequently. Chicago is the second least popular location for layovers on flights from Philadelphia to Seattle.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Seattle flights
Newark to Seattle flights
Dulles Intl to Seattle flights
Reagan-National to Seattle flights
LaGuardia to Seattle flights
John F Kennedy Intl to Portland flights
Newark to Portland flights
LaGuardia to Portland flights
Dulles Intl to Portland flights
Reagan-National to Portland flights
Pittsburgh to Seattle flights
Philadelphia to Portland flights
John F Kennedy Intl to Spokane flights
Newark to Spokane flights
Dulles Intl to Spokane flights
Harrisburg to Seattle flights
LaGuardia to Spokane flights
Pittsburgh to Portland flights
Reagan-National to Spokane flights
Philadelphia to Spokane flights
State College to Seattle flights
Reagan-National to Pasco flights
Dulles Intl to Pasco flights
Pittsburgh to Spokane flights
Harrisburg to Portland flights
Allentown to Seattle flights
Newark to Pasco flights
Scranton to Seattle flights
John F Kennedy Intl to Pasco flights
State College to Portland flights
John F Kennedy Intl to Bellingham flights
LaGuardia to Pasco flights
Allentown to Portland flights
Philadelphia to Pasco flights
Harrisburg to Spokane flights
Dulles Intl to Pullman flights
LaGuardia to Bellingham flights
Newark to Bellingham flights
John F Kennedy Intl to Wenatchee flights
Newark to Wenatchee flights
Elmira to Seattle flights
Reagan-National to Pullman flights
Newark to Pullman flights
Scranton to Portland flights
Reagan-National to Wenatchee flights
Dulles Intl to Wenatchee flights
Newark to Yakima flights
Dulles Intl to Walla Walla flights
Dulles Intl to Bellingham flights

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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$125Average$261FlexibilityNo cancel feeOn-time62%
FrontierCheapest$138Average$252FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$162Average$262FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$199Average$308FlexibilityNo cancel feeOn-time83%
DeltaCheapest$259Average$392FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$273Average$460FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$276Average$556FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$276Average$518FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$301Average$486FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines