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$72+ Cheap flights from Dulles Intl (IAD) 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHL
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
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Cheap flight deals from Dulles Intl to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$172
(Kiwi.com)

One-way from

$72
(Kiwi.com)

Popular in

August

Cheapest in

March

Average price

$231

Good round-trip deal

$179 or less

Good one-way deal

$203 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Philadelphia flights.
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From Washington, D.C. Dulles Intl to Philadelphia
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One-way flight from Washington, D.C. Dulles Intl to Philadelphia
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Highest demand for flights based on searches. 27% potential increase in price ($147 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Philadelphia.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Philadelphia.
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Find flight deals from Dulles Intl to Philadelphia

Cheapest flights from Dulles Intl to Philadelphia
Explore the most affordable flight options available from Dulles Intl to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/112:47 pmIAD - PHL
1 stop20h 06mMultiple Airlines
Fri 12/57:42 pmPHL - IAD
2 stops27h 23mMultiple Airlines
Deal found 11/15$170
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 12/39:00 amIAD - PHL
1 stop15h 26mMultiple Airlines
Sun 12/75:05 amPHL - IAD
1 stop27h 26mMultiple Airlines
Deal found 11/18$172
This United Airlines deal was found by Cheapflights users on 11/16. 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.
Sat 12/138:20 amIAD - PHL
Nonstop1h 15mUnited Airlines
Sun 12/1410:33 amPHL - IAD
Nonstop1h 07mUnited Airlines
Deal found 11/16$179
This Kiwi.com deal was found by Cheapflights users on 11/18. 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.
Sat 12/135:45 amIAD - PHL
1 stop5h 33mMultiple Airlines
Sun 12/1410:00 pmPHL - IAD
2 stops17h 10mMultiple Airlines
Deal found 11/18$191
This United Airlines deal was found by Cheapflights users on 11/17. 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.
Tue 12/212:55 pmIAD - PHL
Nonstop1h 13mUnited Airlines
Sat 12/610:33 amPHL - IAD
Nonstop1h 07mUnited Airlines
Deal found 11/17$209
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/179:00 amIAD - PHL
1 stop7h 52mFrontier
Wed 12/246:00 amPHL - IAD
2 stops29h 38mFrontier
Deal found 11/17$221
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
Thu 12/117:18 pmIAD - PHL
1 stop5h 33mMultiple Airlines
Mon 12/155:30 amPHL - IAD
2 stops9h 40mMultiple Airlines
Deal found 11/16$223
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 12/169:00 amIAD - PHL
1 stop7h 31mFrontier
Tue 12/237:01 pmPHL - IAD
2 stops16h 37mFrontier
Deal found 11/18$224
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 12/179:00 amIAD - PHL
1 stop7h 52mFrontier
Fri 12/196:00 amPHL - IAD
2 stops12h 16mFrontier
Deal found 11/18$233
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/29:00 amIAD - PHL
1 stop7h 52mMultiple Airlines
Sat 12/65:15 amPHL - IAD
2 stops17h 50mMultiple Airlines
Deal found 11/17$235

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 18, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Philadelphia that are best for you.

Fly from

Dulles Intl

Fly to

Philadelphia

Route

Depart

Return

Price

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Mon 12/1

12:47 pm-8:53 am

1 stop20h 06m

Philadelphia

Fri 12/5

7:42 pm-11:05 pm

2 stops27h 23m

$170

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 12/11

8:20 am-9:35 am

Nonstop1h 15m

Philadelphia

Mon 12/15

8:05 pm-9:15 pm

Nonstop1h 10m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 12/16

12:55 pm-2:08 pm

Nonstop1h 13m

Philadelphia

Tue 12/23

2:50 pm-4:05 pm

Nonstop1h 15m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 1/3

10:20 pm-11:30 pm

Nonstop1h 10m

Philadelphia

Sun 1/4

6:00 am-7:15 am

Nonstop1h 15m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 12/13

8:20 am-9:35 am

Nonstop1h 15m

Philadelphia

Sun 12/14

10:33 am-11:40 am

Nonstop1h 07m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 12/13

5:45 am-11:18 am

1 stop5h 33m

Philadelphia

Sun 12/14

10:00 pm-3:10 pm

2 stops17h 10m

$191

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Wed 12/3

12:55 pm-2:08 pm

Nonstop1h 13m

Philadelphia

Sun 12/7

10:33 am-11:40 am

Nonstop1h 07m

$209

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 12/2

12:55 pm-2:08 pm

Nonstop1h 13m

Philadelphia

Sat 12/6

10:33 am-11:40 am

Nonstop1h 07m

$209

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 1/8

12:55 pm-2:10 pm

Nonstop1h 15m

Philadelphia

Sun 1/11

10:30 am-11:48 am

Nonstop1h 18m

$239

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 12/9

12:55 pm-2:08 pm

Nonstop1h 13m

Philadelphia

Tue 12/16

8:05 pm-9:15 pm

Nonstop1h 10m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 21 results
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Compare providers for flights from Dulles Intl to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Philadelphia in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Philadelphia flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Philadelphia flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Philadelphia flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Dulles Intl 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, D.C. Dulles Intl Airport to Philadelphia

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Philadelphia?

Currently, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Philadelphia (average of $67). Flying from Washington, D.C. Dulles Intl Airport to Philadelphia in January is currently the most expensive (average of $148). 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 IAD to PHL?

Find hourly flight availability from Dulles Intl 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 18, 2025.

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Philadelphia is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 41% on airfare.

The best insider tips for Washington, D.C. Dulles Intl Airport to Philadelphia flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Philadelphia trip
Airports
IAD

For a smooth departure, use the Aerotrain to reach distant gates quickly. Pay attention to signage as it's not a loop system.

Read more about IADby Ramsey Qubein
PHL

To reach downtown, SEPTA trains are efficient. Stations are near Terminals A, B, C/D, and E/F, with service from 5 a.m. to midnight.

Read more about PHLby Mark Chesnut
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut

Mark Chesnut

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Philadelphia. Reviews last updated November 18, 2025.
Get a feel of what it's like to fly with United Airlines from Washington, D.C. Dulles Intl Airport to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,019 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,019 reviews
United Airlines
7.4
Good
9,019 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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, D.C. Dulles Intl?

    Philadelphia (PHL), located 7.0 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Philadelphia. 1 airline have flights to Philadelphia from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Philadelphia should not be difficult; the airport handles an average of 9 inbound flights from Washington, D.C. Dulles Intl per day.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Philadelphia?

    A quick flight from Washington, D.C. Dulles Intl Airport to Philadelphia can take about 1h 15m. United Airlines provides one of the quickest options available for as low as $179. The distance between Washington, D.C. Dulles Intl Airport and Philadelphia is about 134 mi. All flights are typically nonstop.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Philadelphia round-trip?

    United Airlines, at $179, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Philadelphia.. Users have found that United Airlines is 53% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Philadelphia?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Philadelphia are CommutAir (100%), United Airlines (86%) and Air Canada (85%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Philadelphia?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Philadelphia is $179. On average you can expect to pay $478. The most popular route, (Washington, D.C. Dulles Intl - Philadelphia), can usually be booked for $179.

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

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

  • How can I find direct flights from Dulles Intl to Philadelphia?

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Philadelphia?

    Currently, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Philadelphia (average of $67). Flying from Washington, D.C. Dulles Intl Airport to Philadelphia in January is currently the most expensive (average of $148). 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
New Castle
Newark
Millville
Chester
Exton

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Alternative routes for Dulles Intl to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Dulles Intl to Elmira flights
Baltimore to Lancaster flights
Baltimore to DuBois flights
Reagan-National to Williamsport flights
Baltimore to Altoona flights
Baltimore to Williamsport flights
Baltimore to Hagerstown flights

Top airline flying from Dulles Intl to Philadelphia

Discover the top airline that operate flights from Dulles Intl 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$179Average$406FlexibilityNo cancel feeOn-time69%

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