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Philadelphia

$112+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
Sep 2 — Sep 91
Wed 9/2
Wed 9/9
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 August 3, 2026.

This Delta deal was found by Cheapflights users on 7/29. 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.
Sat 9/55:40 pm
GEG
-
PHL
1 stop9h 10m
Delta
Wed 9/97:05 am
PHL
-
GEG
1 stop8h 15m
Delta
Deal found 7/29$289
This Southwest deal was found by Cheapflights users on 8/3. 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.
Sat 9/58:00 am
GEG
-
PHL
2 stops11h 55m
Southwest
Fri 9/116:05 pm
PHL
-
GEG
1 stop7h 40m
Southwest
Deal found 8/3$294
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:06 pm
GEG
-
PHL
1 stop7h 59m
Delta
Tue 10/67:00 am
PHL
-
GEG
1 stop10h 50m
Delta
Deal found 7/30$300
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:30 am
GEG
-
PHL
1 stop8h 15m
Delta
Sat 9/127:05 am
PHL
-
GEG
1 stop11h 09m
Delta
Deal found 7/31$307
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:23 pm
GEG
-
PHL
1 stop7h 42m
Delta
Mon 10/195:20 am
PHL
-
GEG
1 stop9h 30m
Delta
Deal found 7/30$311
This Southwest deal was found by Cheapflights users on 7/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:45 pm
GEG
-
PHL
1 stop7h 10m
Southwest
Sat 9/121:10 pm
PHL
-
GEG
2 stops10h 50m
Southwest
Deal found 7/31$312
This Southwest deal was found by Cheapflights users on 7/29. 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 9/231:55 pm
GEG
-
PHL
1 stop7h 00m
Southwest
Sat 9/266:30 am
PHL
-
GEG
2 stops9h 30m
Southwest
Deal found 7/29$316
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:40 pm
GEG
-
PHL
1 stop9h 10m
Delta
Sat 8/297:05 am
PHL
-
GEG
1 stop8h 03m
Delta
Deal found 7/31$325
This American Airlines deal was found by Cheapflights users on 7/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/305:40 am
GEG
-
PHL
1 stop10h 08m
American Airlines
Sun 9/65:43 am
PHL
-
GEG
1 stop10h 54m
American Airlines
Deal found 7/31$329
This Priceline deal was found by Cheapflights users on 7/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/289:27 pm
SEA
-
PHL
Nonstop5h 13m
Multiple Airlines
Thu 9/37:00 am
PHL
-
SEA
1 stop11h 28m
Multiple Airlines
Deal found 7/29$330
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Tue 8/187:06 pm
SEA
-
PHL
1 stop7h 33m
Frontier
Thu 8/2710:01 pm
PHL
-
SEA
2 stops17h 19m
Frontier
Deal found 8/3$332
This Southwest deal was found by Cheapflights users on 7/29. 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.
Sat 9/198:00 am
GEG
-
PHL
2 stops9h 50m
Southwest
Sat 9/261:10 pm
PHL
-
GEG
2 stops10h 50m
Southwest
Deal found 7/29$332

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 August 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(Delta)

One-way from

$112
(Frontier)

Popular in

December

Cheapest in

October

Average price

$473

Good round-trip deal

$377 or less

Good one-way deal

$204 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. 0% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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 August 3, 2026.
Use the filters below to find and compare flights from Washington to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Sat 9/19

1:37 pm-11:44 pm

1 stop7h 07m

Philadelphia

Sat 9/26

9:27 am-6:31 pm

1 stop12h 04m

$289

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 10/15

7:23 pm-6:05 am

1 stop7h 42m

Philadelphia

Mon 10/19

7:00 am-2:50 pm

1 stop10h 50m

$325

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 11/12

7:15 pm-6:00 am

1 stop7h 45m

Philadelphia

Sat 11/14

3:00 pm-7:55 pm

1 stop7h 55m

$325

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 9/23

2:05 pm-11:56 pm

1 stop6h 51m

Philadelphia

Sun 9/27

6:52 pm-11:29 pm

1 stop7h 37m

$329

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Sat 9/19

8:00 am-8:50 pm

2 stops9h 50m

Philadelphia

Sat 9/26

1:10 pm-9:00 pm

2 stops10h 50m

$332

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Thu 11/12

5:50 am-7:25 pm

2 stops10h 35m

Philadelphia

Sat 11/14

5:20 am-10:30 am

1 stop8h 10m

$338

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 10/29

5:50 am-7:35 pm

2 stops10h 45m

Philadelphia

Mon 11/2

1:50 pm-11:00 pm

2 stops12h 10m

$339

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Mon 9/14

11:05 pm-11:35 am

1 stop9h 30m

Philadelphia

Mon 9/21

4:05 pm-11:00 pm

1 stop9h 55m

$347

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Sun 8/23

10:56 pm-9:38 am

1 stop7h 42m

Philadelphia

Wed 8/26

7:05 am-3:19 pm

1 stop11h 14m

$349
Quickest round-trip

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 9/16

9:27 pm-5:40 am

Nonstop5h 13m

Philadelphia

Wed 9/23

6:59 pm-9:51 pm

Nonstop5h 52m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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, February is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $330). Flying from State of Washington to Philadelphia in December is currently the most expensive (average of $517). 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 August 3, 2026.

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 August 3, 2026.

The most flights from USWA to PHL are scheduled on a Friday (9 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from State of Washington to Philadelphia?

Airfare is below average for this route at the moment.
State of Washington to Philadelphia flights typically cost between $373 and $586 in September.
The cheapest round-trip price found within the last 5 days was $330 on Multiple Airlines (Sep 1-Sep 13).

How far ahead should I book a flight from State of Washington to Philadelphia?

Booking 35 days in advance of your planned departure date is, on average, the best time to get cheap flights from State of Washington to Philadelphia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 14 times in the past calendar month.

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

    For as low as $289, United Airlines can have you in Philadelphia from State of Washington in 7h 07m. 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 Frontier, with whom users have recently found tickets for as low as $100. However, be on the lookout for offers from United Airlines and Delta, 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: KLM (100%), Finnair (100%), STARLUX Airlines (90%).

  • 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 $716, our data indicates the cheapest price to be $156. The most popular route (Seattle/Tacoma Intl - Philadelphia), is priced around $291.

  • 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, February is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $330). Flying from State of Washington to Philadelphia in December is currently the most expensive (average of $517). 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
Reading
King of Prussia
Camden
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Washington to Philadelphia

Discover the top 7 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 August 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$138Average$433FlexibilityNo cancel feeOn-time85%
FrontierCheapest$149Average$309FlexibilityNo cancel feeOn-time62%
DeltaCheapest$206Average$420FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$242Average$466FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$257Average$465FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$257Average$435FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$299Average$453FlexibilityNo cancel feeOn-time63%

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