HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Philadelphia

$86+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
Apr 23 — Apr 301
Thu 4/23
Thu 4/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Philadelphia 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.

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 March 24, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:12 pm
SEA
-
PHL
1 stop31h 22m
Frontier
Wed 4/298:31 pm
PHL
-
SEA
1 stop15h 56m
Frontier
Deal found 3/19$277
This Booking.com deal was found by Cheapflights users on 3/22. 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.
Wed 4/227:12 pm
SEA
-
PHL
1 stop7h 22m
Frontier
Sun 4/268:36 pm
PHL
-
SEA
1 stop21h 29m
Frontier
Deal found 3/22$278
This Kiwi.com deal was found by Cheapflights users on 3/21. 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 4/217:12 pm
SEA
-
PHL
2 stops36h 41m
Frontier
Sat 4/258:41 pm
PHL
-
SEA
1 stop15h 46m
Frontier
Deal found 3/21$279
This Kiwi.com deal was found by Cheapflights users on 3/21. 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.
Wed 4/2212:38 pm
PDX
-
PHL
2 stops19h 15m
Frontier
Tue 4/288:36 pm
PHL
-
PDX
1 stop18h 16m
Frontier
Deal found 3/21$279
This CheapOair deal was found by Cheapflights users on 3/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:21 am
SEA
-
PHL
1 stop18h 49m
Frontier
Sun 5/317:50 pm
PHL
-
SEA
1 stop25h 45m
Frontier
Deal found 3/23$281
This CheapOair deal was found by Cheapflights users on 3/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:42 pm
PDX
-
PHL
1 stop15h 05m
Frontier
Mon 8/38:37 pm
PHL
-
PDX
1 stop23h 20m
Frontier
Deal found 3/23$281
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/244:20 pm
SEA
-
PHL
2 stops26h 54m
Frontier
Mon 4/278:41 pm
PHL
-
SEA
1 stop15h 46m
Frontier
Deal found 3/19$282
This Booking.com deal was found by Cheapflights users on 3/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2111:21 am
SEA
-
PHL
1 stop18h 49m
Frontier
Mon 5/257:50 pm
PHL
-
SEA
1 stop25h 45m
Frontier
Deal found 3/23$283
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:50 pm
SEA
-
PHL
1 stop30h 47m
Frontier
Fri 5/158:35 pm
PHL
-
SEA
1 stop16h 14m
Frontier
Deal found 3/19$284
This Kiwi.com deal was found by Cheapflights users on 3/22. 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 4/2812:38 pm
PDX
-
PHL
2 stops33h 16m
Frontier
Sat 5/28:41 pm
PHL
-
PDX
1 stop16h 39m
Frontier
Deal found 3/22$285
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:12 pm
SEA
-
PHL
2 stops25h 30m
Frontier
Mon 4/278:41 pm
PHL
-
SEA
1 stop15h 46m
Frontier
Deal found 3/19$286
This CheapOair deal was found by Cheapflights users on 3/21. 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.
Fri 4/1012:42 pm
SEA
-
PHL
1 stop13h 49m
Frontier
Sun 4/268:36 pm
PHL
-
SEA
1 stop21h 29m
Frontier
Deal found 3/21$287

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 March 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(Kiwi.com)

One-way from

$86
(Frontier)

Popular in

December

Cheapest in

October

Average price

$430

Good round-trip deal

$373 or less

Good one-way deal

$208 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. 3% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 24, 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
Quickest round-trip

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 6/4

9:20 pm-5:35 am

Nonstop5h 15m

Philadelphia

Sun 6/7

7:05 am-10:04 am

Nonstop5h 59m

$329

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 4/30

10:55 am-12:35 am

2 stops10h 40m

Philadelphia

Wed 5/6

5:45 pm-12:10 am

1 stop9h 25m

$334

PortlandPhiladelphia

PDX - PHL

PDXPHL

Portland

Tue 5/26

11:40 pm-9:39 am

1 stop6h 59m

Philadelphia

Fri 5/29

3:10 pm-8:19 pm

1 stop8h 09m

$337

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Fri 9/18

11:53 pm-10:33 am

1 stop7h 40m

Philadelphia

Sun 9/20

7:05 am-10:04 am

Nonstop5h 59m

$339

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Thu 7/23

11:53 pm-10:33 am

1 stop7h 40m

Philadelphia

Fri 7/31

6:40 pm-12:01 am

1 stop8h 21m

$349

SeattlePhiladelphia

SEA - PHL

SEAPHL

Seattle/Tacoma Intl

Wed 8/19

9:50 pm-6:05 am

Nonstop5h 15m

Philadelphia

Thu 8/27

7:05 am-10:04 am

Nonstop5h 59m

$354

PascoPhiladelphia

PSC - PHL

PSCPHL

Pasco Tri Cities

Tue 4/28

1:21 pm-6:02 am

1 stop13h 41m

Philadelphia

Tue 5/5

7:22 am-12:44 pm

1 stop8h 22m

$357

PascoPhiladelphia

PSC - PHL

PSCPHL

Pasco Tri Cities

Sat 5/9

1:05 pm-11:43 pm

1 stop7h 38m

Philadelphia

Tue 5/12

6:00 am-12:15 pm

1 stop9h 15m

$357

SpokanePhiladelphia

GEG - PHL

GEGPHL

Spokane

Wed 4/22

5:30 am-5:42 pm

1 stop9h 12m

Philadelphia

Wed 4/29

6:05 am-2:49 pm

2 stops11h 44m

$362

PortlandPhiladelphia

PDX - PHL

PDXPHL

Portland

Wed 5/6

11:55 pm-9:59 am

1 stop7h 04m

Philadelphia

Sun 5/10

6:10 am-11:37 am

1 stop8h 27m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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, December is the cheapest month in which you can book a flight from State of Washington to Philadelphia (average of $129). Flying from State of Washington to Philadelphia in February is currently the most expensive (average of $207). 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 March 24, 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 March 24, 2026.

The most flights from USWA to PHL are scheduled on a Friday (7 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 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 10 times in the past calendar month.

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

    For as low as $329, Delta can have you in Philadelphia from State of Washington in 5h 15m. 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 Frontier, with whom users have recently found tickets for as low as $99. However, be on the lookout for offers from Spirit 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: Qatar Airways (82%), British Airways (82%), American Airlines (81%).

  • 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 $503, our data indicates the cheapest price to be $148. The most popular route (Seattle/Tacoma Intl - Philadelphia), is priced around $255.

  • 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 $129). Flying from State of Washington to Philadelphia in February is currently the most expensive (average of $207). 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
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Cherry Hill
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester

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 Washington to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Newark flights
San Francisco to John F Kennedy Intl flights
San Francisco to LaGuardia flights
Los Angeles to John F Kennedy Intl flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to Newark flights
Los Angeles to Newark flights
O'Hare Intl to John F Kennedy Intl flights
Dallas/Fort Worth to John F Kennedy Intl flights
Los Angeles to LaGuardia flights
Miami to John F Kennedy Intl flights
Atlanta to LaGuardia flights
Fort Lauderdale to John F Kennedy Intl flights
Fort Lauderdale to LaGuardia flights
O'Hare Intl to Newark flights
Atlanta to John F Kennedy Intl flights
Dallas/Fort Worth to Dulles Intl flights
Seattle to Newark flights
Fort Lauderdale to Newark flights
O'Hare Intl to LaGuardia flights
Miami to LaGuardia flights
Orlando to John F Kennedy Intl flights
Miami to Newark flights
Hobby to John F Kennedy Intl flights
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights
Seattle to John F Kennedy Intl flights
Denver to John F Kennedy Intl flights
Hobby to LaGuardia flights
Denver to LaGuardia flights
Tampa to LaGuardia flights
Raleigh to LaGuardia flights
Orlando to LaGuardia flights
Atlanta to Newark flights
Tampa to John F Kennedy Intl flights
Orlando to Newark flights
George Bush Intcntl to John F Kennedy Intl flights
Denver to Newark flights
Boston to Dulles Intl flights
Tampa to Newark flights
West Palm Beach to Newark flights
O'Hare Intl to Reagan-National flights
Minneapolis to LaGuardia flights
Raleigh to John F Kennedy Intl flights
Boston to Reagan-National flights
San Francisco to Reagan-National flights
San Francisco to Dulles Intl flights
Seattle to Dulles Intl flights
Minneapolis to John F Kennedy Intl flights
Seattle to LaGuardia flights

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 March 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$139Average$290FlexibilityNo cancel feeOn-time62%
DeltaCheapest$148Average$403FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$206Average$445FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$223Average$495FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$257Average$412FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$258Average$542FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$295Average$447FlexibilityNo cancel feeOn-time63%

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.