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$93+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHL
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
1 adult, Economy
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Cheap 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 August 1, 2026.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:20 am
IAD
-
PHL
1 stop6h 06m
Frontier
Mon 8/244:45 pm
PHL
-
IAD
1 stop6h 07m
Frontier
Deal found 7/30$172
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:50 am
IAD
-
PHL
1 stop10h 24m
Frontier
Wed 9/168:41 am
PHL
-
IAD
1 stop8h 37m
Frontier
Deal found 7/29$177
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:50 am
IAD
-
PHL
1 stop10h 24m
Frontier
Mon 10/58:41 am
PHL
-
IAD
1 stop8h 37m
Frontier
Deal found 7/31$179
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/308:39 pm
IAD
-
PHL
1 stop10h 36m
Frontier
Sun 9/62:45 pm
PHL
-
IAD
1 stop8h 07m
Frontier
Deal found 7/30$184
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 9/96:13 pm
IAD
-
PHL
1 stop29h 29m
Frontier
Wed 9/165:32 pm
PHL
-
IAD
1 stop6h 38m
Frontier
Deal found 7/27$185
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:39 pm
IAD
-
PHL
1 stop10h 36m
Frontier
Wed 8/264:45 pm
PHL
-
IAD
1 stop6h 07m
Frontier
Deal found 7/30$186
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:50 am
IAD
-
PHL
1 stop10h 24m
Frontier
Wed 9/3012:40 pm
PHL
-
IAD
1 stop11h 30m
Frontier
Deal found 7/30$188
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:39 pm
IAD
-
PHL
1 stop10h 36m
Frontier
Fri 9/42:45 pm
PHL
-
IAD
1 stop26h 29m
Frontier
Deal found 7/31$189
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:50 am
IAD
-
PHL
1 stop10h 24m
Frontier
Sat 10/35:32 pm
PHL
-
IAD
1 stop6h 38m
Frontier
Deal found 7/31$190

Find 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 August 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$172
(Kiwi.com)

One-way from

$93
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$590

Good round-trip deal

$333 or less

Good one-way deal

$268 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Philadelphia flights.
Search Deals
From Washington, D.C. Dulles Intl to Philadelphia
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Philadelphia
Search Deals
High demand for flights, 1% potential price rise
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 August 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Philadelphia.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Philadelphia.
Search Deals

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 August 1, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 9/11

1:05 pm-2:20 pm

Nonstop1h 15m

Philadelphia

Mon 9/14

7:40 pm-9:01 pm

Nonstop1h 21m

$249

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Wed 8/19

1:05 pm-2:21 pm

Nonstop1h 16m

Philadelphia

Mon 8/24

3:05 pm-4:23 pm

Nonstop1h 18m

$264
Quickest round-trip

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 8/21

1:05 pm-2:21 pm

Nonstop1h 16m

Philadelphia

Mon 8/31

10:30 am-11:39 am

Nonstop1h 09m

$269

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 8/14

1:05 pm-2:21 pm

Nonstop1h 16m

Philadelphia

Sun 8/16

7:40 pm-8:59 pm

Nonstop1h 19m

$279

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 8/6

10:10 pm-11:20 pm

Nonstop1h 10m

Philadelphia

Sun 8/9

10:39 am-11:55 am

Nonstop1h 16m

$309

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 9/4

8:39 pm-7:15 am

1 stop10h 36m

Philadelphia

Mon 9/7

5:05 am-2:12 pm

2 stops9h 07m

$312

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sun 8/30

1:05 pm-2:21 pm

Nonstop1h 16m

Philadelphia

Sun 9/6

3:05 pm-4:23 pm

Nonstop1h 18m

$312

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 8/8

10:10 pm-11:20 pm

Nonstop1h 10m

Philadelphia

Sun 8/16

7:40 pm-8:59 pm

Nonstop1h 19m

$314

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 8/29

8:30 am-9:43 am

Nonstop1h 13m

Philadelphia

Sun 8/30

3:05 pm-4:23 pm

Nonstop1h 18m

$319

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 10/8

8:30 am-9:43 am

Nonstop1h 13m

Philadelphia

Sat 10/10

7:30 pm-8:49 pm

Nonstop1h 19m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 22 resultsSorted by cheapest first
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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 August.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Philadelphia flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Philadelphia (average of $184). Flying from Washington, D.C. Dulles Intl Airport to Philadelphia in June is currently the most expensive (average of $610). 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 August 1, 2026.

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 afternoon tend to be the most expensive. A flight at noon could potentially save you up to 43% on airfare.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Philadelphia?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Philadelphia flights typically cost between $487 and $590 in August.
The cheapest round-trip price found within the last 5 days was $172 on Frontier (Aug 19-Aug 24).

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Philadelphia trip
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

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

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 August 1, 2026.
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
10,062 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
10,062 reviews
United Airlines
7.4
Good
10,062 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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 10 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 $249. 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 $194, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Philadelphia.. Users have found that United Airlines is 51% 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 Mesa Airlines (94%), ANA (87%) and Air China (80%).

  • 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 $233. On average you can expect to pay $426. The most popular route, (Washington, D.C. Dulles Intl - Philadelphia), can usually be booked for $249.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Philadelphia (average of $184). Flying from Washington, D.C. Dulles Intl Airport to Philadelphia in June is currently the most expensive (average of $610). 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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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 August 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$194Average$458FlexibilityNo cancel feeOn-time69%

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