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$130+ 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
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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 November 2, 2025.

This Delta deal was found by Cheapflights users on 11/2. 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.
Thu 12/47:11 pmSEA - PHL
1 stop7h 39mDelta
Tue 12/99:39 amPHL - SEA
1 stop8h 06mDelta
Deal found 11/2$267
This Expedia deal was found by Cheapflights users on 11/1. 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.
Wed 11/121:37 pmSEA - PHL
1 stop12h 12mFrontier
Mon 11/176:19 amPHL - SEA
1 stop8h 54mFrontier
Deal found 11/1$272
This Kiwi.com deal was found by Cheapflights users on 11/1. 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.
Fri 12/53:40 pmSEA - PHL
1 stop10h 51mMultiple Airlines
Mon 1/512:28 pmPHL - SEA
2 stops28h 13mMultiple Airlines
Deal found 11/1$276
This Southwest deal was found by Cheapflights users on 10/30. 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.
Mon 12/85:40 amSEA - PHL
1 stop7h 40mSouthwest
Sat 12/133:40 pmPHL - SEA
1 stop8h 20mSouthwest
Deal found 10/30$287
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 11/138:22 pmSEA - PHL
2 stops17h 04mFrontier
Sat 11/156:19 amPHL - SEA
1 stop8h 54mFrontier
Deal found 10/31$288
This Southwest deal was found by Cheapflights users on 11/2. 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.
Thu 12/45:40 amSEA - PHL
1 stop13h 55mSouthwest
Wed 12/101:50 pmPHL - SEA
2 stops12h 05mSouthwest
Deal found 11/2$290
This Southwest deal was found by Cheapflights users on 11/1. 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 12/37:05 amSEA - PHL
2 stops10h 55mSouthwest
Sun 12/76:35 pmPHL - SEA
1 stop9h 00mSouthwest
Deal found 11/1$292
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 11/2810:53 amSEA - PHL
1 stop9h 10mUnited Airlines
Thu 12/412:45 pmPHL - SEA
1 stop9h 37mUnited Airlines
Deal found 10/30$296
This KAYAK deal was found by Cheapflights users on 10/30. 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.
Wed 12/109:35 pmSEA - PHL
Nonstop5h 11mAlaska Airlines
Wed 12/246:44 pmPHL - SEA
Nonstop6h 15mAlaska Airlines
Deal found 10/30$297
This United Airlines deal was found by Cheapflights users on 10/31. 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 11/1212:35 pmSEA - PHL
1 stop7h 28mUnited Airlines
Mon 11/176:00 amPHL - SEA
1 stop8h 28mUnited Airlines
Deal found 10/31$299
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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.
Fri 12/269:29 pmSEA - PHL
Nonstop5h 08mAlaska Airlines
Tue 1/66:44 pmPHL - SEA
Nonstop6h 15mAlaska Airlines
Deal found 11/1$302
This United Airlines deal was found by Cheapflights users on 10/31. 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.
Fri 11/147:13 pmSEA - PHL
2 stops11h 25mUnited Airlines
Sun 11/166:00 amPHL - SEA
1 stop8h 30mUnited Airlines
Deal found 10/31$304

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 November 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$267
(Alaska Airlines)

One-way from

$130
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$446

Good round-trip deal

$329 or less

Good one-way deal

$191 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
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
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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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 November 2, 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 12/4

1:47 pm-11:57 pm

1 stop7h 10m

Philadelphia

Wed 12/10

7:05 am-2:59 pm

1 stop10h 54m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 1/7

9:54 am-6:06 pm

Nonstop5h 12m

Philadelphia

Fri 1/16

7:06 pm-10:29 pm

Nonstop6h 23m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 1/21

10:58 am-9:51 pm

1 stop7h 53m

Philadelphia

Sun 1/25

5:00 pm-10:43 pm

1 stop8h 43m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Mon 1/5

12:00 pm-11:57 pm

1 stop8h 57m

Philadelphia

Sat 1/10

10:30 am-7:00 pm

1 stop11h 30m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 1/7

9:54 am-6:06 pm

Nonstop5h 12m

Philadelphia

Mon 1/12

7:06 pm-10:29 pm

Nonstop6h 23m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 12/11

7:11 pm-5:50 am

1 stop7h 39m

Philadelphia

Tue 12/16

11:46 am-5:00 pm

1 stop8h 14m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 1/7

6:05 am-5:57 pm

1 stop8h 52m

Philadelphia

Sun 1/11

11:27 am-4:45 pm

1 stop8h 18m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Tue 12/2

5:25 am-5:40 pm

1 stop9h 15m

Philadelphia

Mon 12/8

6:00 am-10:40 am

1 stop7h 40m

$267

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 12/4

5:40 am-10:35 pm

1 stop13h 55m

Philadelphia

Wed 12/10

1:50 pm-10:55 pm

2 stops12h 05m

$290

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Fri 11/28

10:53 am-11:03 pm

1 stop9h 10m

Philadelphia

Thu 12/4

12:45 pm-7:22 pm

1 stop9h 37m

$296

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

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, November is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $128). Flying from State of Washington to Philadelphia in January is currently the most expensive (average of $223). 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 November 2, 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.

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 November 2, 2025.

The most flights from USWA to PHL are scheduled on a Sunday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 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 9 times in the past calendar month.

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

    For as low as $267, Delta can have you in Philadelphia from State of Washington in 5h 12m. 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 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 $144. However, be on the lookout for offers from American Airlines and United Airlines, 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: American Airlines (89%), Air Tahiti Nui (86%), STARLUX Airlines (84%).

  • 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 $584, our data indicates the cheapest price to be $123. The most popular route (Seattle/Tacoma Intl - Philadelphia), is priced around $211.

  • 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, November is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $128). Flying from State of Washington to Philadelphia in January is currently the most expensive (average of $223). 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
King of Prussia
Pottstown
Reading
Ocean City
Cherry Hill
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace

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Alternative routes for Washington to Philadelphia

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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 November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$131Average$291FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$138Average$258FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$206Average$530FlexibilityNo cancel feeOn-time69%
DeltaCheapest$221Average$437FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$233Average$355FlexibilityNo cancel feeOn-time83%
Hawaiian AirlinesCheapest$277Average$534FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$277Average$576FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$277Average$428FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$351Average$453FlexibilityNo cancel feeOn-time63%

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