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Philadelphia

$90+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Delta deal was found by Cheapflights users on 12/16. 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 12/311:35 pmSEA - PHL
1 stop6h 43mDelta
Wed 1/76:00 amPHL - SEA
1 stop7h 42mDelta
Deal found 12/16$297
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/315:02 amSEA - PHL
1 stop7h 45mUnited Airlines
Tue 1/66:30 amPHL - SEA
1 stop8h 02mUnited Airlines
Deal found 12/16$356
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/317:12 pmSEA - PHL
1 stop8h 57mUnited Airlines
Wed 1/710:30 amPHL - SEA
2 stops13h 45mUnited Airlines
Deal found 12/16$361
This Booking.com deal was found by Cheapflights users on 12/16. 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.
Mon 12/292:54 pmSEA - PHL
1 stop11h 37mFrontier
Sun 1/48:36 pmPHL - SEA
1 stop18h 54mFrontier
Deal found 12/16$368
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/319:29 pmSEA - PHL
Nonstop5h 08mAlaska Airlines
Tue 1/66:44 pmPHL - SEA
Nonstop6h 15mAlaska Airlines
Deal found 12/16$371
This Mytrip deal was found by Cheapflights users on 12/16. 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.
Wed 12/316:20 pmSEA - PHL
1 stop14h 01mMultiple Airlines
Sun 1/48:36 pmPHL - SEA
1 stop18h 54mMultiple Airlines
Deal found 12/16$389
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/255:54 pmSEA - PHL
1 stop8h 17mUnited Airlines
Thu 1/18:15 amPHL - SEA
1 stop11h 37mUnited Airlines
Deal found 12/17$396
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/319:29 pmSEA - PHL
Nonstop5h 08mAlaska Airlines
Mon 1/57:00 amPHL - SEA
Nonstop6h 04mAlaska Airlines
Deal found 12/16$406
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Mon 12/296:26 pmSEA - PHL
1 stop13h 31mMultiple Airlines
Tue 1/67:11 pmPHL - SEA
2 stops40h 53mMultiple Airlines
Deal found 12/16$411
This CheapOair deal was found by Cheapflights users on 12/16. 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.
Tue 12/302:29 pmPDX - PHL
1 stop12h 11mFrontier
Sat 1/38:36 pmPHL - PDX
1 stop18h 07mFrontier
Deal found 12/16$414
This Expedia deal was found by Cheapflights users on 12/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:54 pmSEA - PHL
1 stop11h 37mMultiple Airlines
Mon 1/267:06 pmPHL - SEA
Nonstop6h 23mMultiple Airlines
Deal found 12/17$415
This Delta deal was found by Cheapflights users on 12/16. 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.
Mon 12/2912:55 amSEA - PHL
1 stop6h 43mDelta
Wed 1/76:00 amPHL - SEA
1 stop7h 42mDelta
Deal found 12/16$427

Find flight deals from Washington to Philadelphia

Keep the following information in mind while searching for Washington to Philadelphia flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$261
(United Airlines)

One-way from

$90
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$646

Good round-trip deal

$409 or less

Good one-way deal

$233 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Philadelphia flights.
Search Deals
From Washington to Philadelphia
Search Deals
One-way flight from Washington to Philadelphia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Washington to Philadelphia.
Search Deals
Price to beat on a one-way flight from Washington to Philadelphia.
Search Deals

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 December 18, 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

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 1/15

7:00 am-5:34 pm

1 stop7h 34m

Philadelphia

Tue 1/20

10:30 am-9:15 pm

2 stops13h 45m

$261

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sat 1/24

5:00 am-5:34 pm

2 stops9h 34m

Philadelphia

Thu 1/29

10:10 am-4:01 pm

1 stop8h 51m

$262

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Fri 1/23

5:00 am-6:54 pm

2 stops10h 54m

Philadelphia

Mon 1/26

3:01 pm-8:57 pm

1 stop8h 56m

$262

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 2/5

9:54 am-6:03 pm

Nonstop5h 09m

Philadelphia

Mon 2/23

6:20 pm-9:33 pm

Nonstop6h 13m

$277

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sun 1/18

6:05 am-4:28 pm

1 stop7h 23m

Philadelphia

Wed 1/21

6:15 am-10:55 am

1 stop7h 40m

$277

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 2/5

9:54 am-6:03 pm

Nonstop5h 09m

Philadelphia

Mon 2/9

7:06 pm-10:29 pm

Nonstop6h 23m

$277

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sat 1/10

10:58 am-9:36 pm

1 stop7h 38m

Philadelphia

Wed 1/14

6:30 am-3:44 pm

2 stops12h 14m

$287

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Sun 2/8

9:25 am-9:52 pm

1 stop9h 27m

Philadelphia

Tue 2/17

10:35 am-7:03 pm

2 stops11h 28m

$291

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 1/8

11:25 am-11:14 pm

1 stop8h 49m

Philadelphia

Thu 1/15

9:40 am-2:21 pm

1 stop7h 41m

$297

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Mon 1/19

11:10 pm-8:50 am

1 stop6h 40m

Philadelphia

Thu 1/22

2:30 pm-11:15 pm

1 stop11h 45m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

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, December is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $132). Flying from State of Washington to Philadelphia in February is currently the most expensive (average of $199). 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 December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Philadelphia in the evening. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from State of Washington to Philadelphia?

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

Travelers seeking maximum savings on their State of Washington to Philadelphia flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 4 times in the past calendar month.

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

    For as low as $277, United Airlines can have you in Philadelphia from State of Washington in 5h 09m. Airlines will cover a distance of 2370 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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: American Airlines (88%), STARLUX Airlines (85%), Hawaiian Airlines (75%).

  • 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 $473, our data indicates the cheapest price to be $138. The most popular route (Seattle/Tacoma Intl - Philadelphia), is priced around $227.

  • 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, December is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $132). Flying from State of Washington to Philadelphia in February is currently the most expensive (average of $199). 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
Wildwood
Pottstown
King of Prussia
Reading
Ocean City
Cherry Hill
Lewes
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Newark
Millville
Chester

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Top 9 airlines flying from Washington to Philadelphia

Discover the top 9 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$138Average$258FlexibilityNo cancel feeOn-time65%
FrontierCheapest$140Average$298FlexibilityNo cancel feeOn-time62%
DeltaCheapest$219Average$428FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$221Average$494FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$233Average$355FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$267Average$422FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$277Average$534FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$277Average$579FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$351Average$454FlexibilityNo cancel feeOn-time63%

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