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$149+ Cheap flights from Washington to Philadelphia (PHL)

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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
oct. 25 — nov. 11
sáb. 10/25
sáb. 11/1
1 adult, Economy
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Cheap flight deals from Washington to Philadelphia

Keep the following information in mind while searching for Washington to Philadelphia flight deals. Data was last updated septiembre 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$252
(KAYAK)

One-way from

$149
(American Airlines)

Popular in

December

Cheapest in

March

Average price

$419

Good round-trip deal

$331 or less

Good one-way deal

$189 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Philadelphia flights.
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From Washington to Philadelphia
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One-way flight from Washington to Philadelphia
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Highest demand for flights based on searches. 5% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington to Philadelphia.
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Price to beat on a one-way flight from Washington to Philadelphia.
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Find flight deals from Washington to Philadelphia

Cheapest flights from Washington to Philadelphia
Explore the most affordable flight options available from Washington to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 25, 2025.

This Frontier deal was found by Cheapflights users on 9/23. 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.
jue. 10/2312:03 pmGEG - PHL
2 stops23h 57mFrontier
jue. 10/306:19 amPHL - GEG
1 stop7h 49mFrontier
Deal found 9/23$228
This KAYAK deal was found by Cheapflights users on 9/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/215:54 pmGEG - PHL
1 stop8h 46mAlaska Airlines
sáb. 10/257:11 pmPHL - GEG
1 stop8h 16mAlaska Airlines
Deal found 9/25$252
This Frontier deal was found by Cheapflights users on 9/25. 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.
dom. 11/912:03 pmGEG - PHL
1 stop13h 46mFrontier
mié. 11/129:30 pmPHL - GEG
2 stops16h 38mFrontier
Deal found 9/25$256
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
vie. 10/178:43 pmSEA - PHL
2 stops22h 47mFrontier
sáb. 10/256:42 amPHL - SEA
1 stop27h 51mFrontier
Deal found 9/25$260
This United Airlines deal was found by Cheapflights users on 9/23. 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.
jue. 10/2311:10 amSEA - PHL
2 stops10h 35mUnited Airlines
lun. 10/275:07 pmPHL - SEA
1 stop8h 38mUnited Airlines
Deal found 9/23$264
This Frontier deal was found by Cheapflights users on 9/23. 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.
mar. 10/211:02 pmSEA - PHL
2 stops18h 32mFrontier
mar. 10/289:30 pmPHL - SEA
2 stops17h 43mFrontier
Deal found 9/23$265
This United Airlines deal was found by Cheapflights users on 9/23. 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.
mar. 10/211:57 pmSEA - PHL
1 stop7h 48mUnited Airlines
mié. 10/296:00 amPHL - SEA
2 stops10h 54mUnited Airlines
Deal found 9/23$266
This American Airlines deal was found by Cheapflights users on 9/25. 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.
sáb. 10/253:29 pmSEA - PHL
1 stop10h 38mAmerican Airlines
dom. 10/268:09 amPHL - SEA
Nonstop5h 54mAmerican Airlines
Deal found 9/25$267
This Frontier deal was found by Cheapflights users on 9/25. 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.
vie. 11/72:22 pmSEA - PHL
1 stop11h 27mFrontier
dom. 11/910:48 pmPHL - SEA
2 stops16h 25mFrontier
Deal found 9/25$268
This KAYAK deal was found by Cheapflights users on 9/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/19:36 pmSEA - PHL
Nonstop5h 11mAlaska Airlines
dom. 12/77:06 amPHL - SEA
Nonstop6h 14mAlaska Airlines
Deal found 9/25$270
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
sáb. 10/2511:46 amGEG - PHL
1 stop14h 54mAlaska Airlines
mar. 10/287:12 pmPHL - GEG
1 stop27h 49mAlaska Airlines
Deal found 9/24$270
This American Airlines deal was found by Cheapflights users on 9/24. 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.
lun. 10/2010:54 pmSEA - PHL
Nonstop5h 06mAmerican Airlines
jue. 10/307:38 amPHL - SEA
1 stop9h 08mAmerican Airlines
Deal found 9/24$272

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Philadelphia 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 septiembre 25, 2025.
Use the filters below to find and compare flights from Washington to Philadelphia that are best for you.

Fly from

Washington

Fly to

Philadelphia

Route

Depart

Return

Price

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 10/21

5:54 pm-5:40 am

1 stop8h 46m

Philadelphia

sáb. 10/25

7:11 pm-12:27 am

1 stop8h 16m

$252

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

dom. 11/9

12:03 pm-4:49 am

1 stop13h 46m

Philadelphia

mié. 11/12

9:30 pm-11:08 am

2 stops16h 38m

$256

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

jue. 10/23

11:10 am-12:45 am

2 stops10h 35m

Philadelphia

lun. 10/27

5:07 pm-10:45 pm

1 stop8h 38m

$264

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

mar. 10/28

1:20 pm-5:42 am

1 stop13h 22m

Philadelphia

sáb. 11/1

7:12 pm-12:22 am

1 stop8h 10m

$270

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

sáb. 10/25

11:46 am-5:40 am

1 stop14h 54m

Philadelphia

mar. 10/28

7:12 pm-8:01 pm

1 stop27h 49m

$270

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

sáb. 10/25

5:54 pm-5:40 am

1 stop8h 46m

Philadelphia

sáb. 11/1

7:02 am-10:59 pm

1 stop18h 57m

$270

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

mar. 11/18

7:00 am-5:29 pm

1 stop7h 29m

Philadelphia

mar. 11/25

6:00 am-11:28 am

1 stop8h 28m

$275

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

mar. 12/9

5:25 am-5:40 pm

1 stop9h 15m

Philadelphia

mar. 12/16

6:07 pm-11:58 pm

1 stop8h 51m

$277

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

mar. 10/21

11:40 am-12:52 am

1 stop10h 12m

Philadelphia

mié. 10/29

7:05 am-12:47 pm

1 stop8h 42m

$277

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

vie. 11/21

11:55 pm-10:51 am

1 stop7h 56m

Philadelphia

lun. 11/24

6:14 am-10:54 am

1 stop7h 40m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/23

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Washington 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.

Cheapflights Insights

Everything you need to know about your flight from Washington to Philadelphia

What is the cheapest month to book a flight from State of Washington to Philadelphia?

Currently, August is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $236). Flying from State of Washington to Philadelphia in March is currently the most expensive (average of $295). 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 WA to PHL?

Find hourly flight availability from Washington to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Philadelphia as you normally would.

Weekly flight availability from State of Washington to Philadelphia

Explore weekly flight availability from Washington to Philadelphia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated septiembre 25, 2025.

The most flights from USWA to PHL are scheduled on a Monday (11 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (8 on average).

Related info for your journey

Find useful and relevant information for your journey from Washington to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Philadelphia from Washington?

    If you book a flight to Philadelphia from Washington, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia.

  • How popular is this State of Washington to Philadelphia flight route?

    Flights from Washington to Philadelphia have been viewed 8 times in the past calendar month.

  • How long is the flight from State of Washington to Philadelphia?

    For as low as $252, Alaska Airlines can have you in Philadelphia from State of Washington in 8h 46m. Airlines will cover a distance of 2147 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Philadelphia one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $149. However, be on the lookout for offers from American Airlines and Frontier, as they are both options that can get you from State of Washington to Philadelphia for a low price.

  • What are the most popular routes from State of Washington to Philadelphia?

    While some choose either Portland - Philadelphia or Spokane - Philadelphia, Seattle/Tacoma Intl - Philadelphia is the most popular route from State of Washington to Philadelphia.

  • What are the most reliable airlines from State of Washington to Philadelphia?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from State of Washington to Philadelphia on time: Finnair (82%), Hawaiian Airlines (77%), Qatar Airways (77%).

  • What are the cheapest flights from State of Washington to Philadelphia?

    Looking for the cheapest flight from State of Washington to Philadelphia? While on average our users pay $872, our data indicates the cheapest price to be $133. The most popular route (Seattle/Tacoma Intl - Philadelphia), is priced around $179.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Philadelphia 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 State of Washington to Philadelphia?

    Currently, August is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $236). Flying from State of Washington to Philadelphia in March is currently the most expensive (average of $295). 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
Vineland
Wildwood
King of Prussia
Pottstown
Reading
Ocean City
Dewey Beach
Ephrata
Camden
Cherry Hill
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace
Plymouth Meeting

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Alternative routes for Washington to Philadelphia

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Top 8 airlines flying from Washington to Philadelphia

Discover the top 8 airlines that operate flights from Washington to Philadelphia. 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 septiembre 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$114Average$258FlexibilityNo cancel feeOn-time65%
FrontierCheapest$131Average$286FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$223Average$466FlexibilityNo cancel feeOn-time69%
DeltaCheapest$233Average$441FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$277Average$537FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$277Average$421FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$278Average$604FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$343Average$448FlexibilityNo cancel feeOn-time63%

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