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$162+ 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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHL
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$179
(United Airlines)

One-way from

$162
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$438

Good round-trip deal

$239 or less

Good one-way deal

$128 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. 15% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/28. 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 6/2112:55 pmIAD - PHL
Nonstop1h 14mUnited Airlines
Sat 6/286:05 amPHL - IAD
Nonstop1h 10mUnited Airlines
Deal found 4/28$179
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/218:14 pmIAD - PHL
1 stop3h 54mAmerican Airlines
Sat 6/286:08 amPHL - IAD
1 stop4h 40mAmerican Airlines
Deal found 4/29$289
This eDestinos deal was found by Cheapflights users on 4/29. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/134:24 pmIAD - PHL
1 stop18h 51mFrontier
Fri 6/206:54 pmPHL - IAD
1 stop20h 22mFrontier
Deal found 4/29$304
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/219:42 pmIAD - PHL
2 stops34h 06mMultiple Airlines
Sat 6/2812:00 pmPHL - IAD
1 stop9h 37mMultiple Airlines
Deal found 4/29$392
This KAYAK deal was found by Cheapflights users on 4/28. 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.
Mon 5/55:23 pmIAD - PHL
1 stop5h 52mDelta
Thu 5/86:00 amPHL - IAD
2 stops10h 45mDelta
Deal found 4/28$1,117

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 April 29, 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

Sat 6/21

12:55 pm-2:09 pm

Nonstop1h 14m

Philadelphia

Sat 6/28

6:05 am-7:15 am

Nonstop1h 10m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 6/21

8:14 pm-12:08 am

1 stop3h 54m

Philadelphia

Sat 6/28

6:08 am-10:48 am

1 stop4h 40m

$289

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 6/13

4:24 pm-11:15 am

1 stop18h 51m

Philadelphia

Fri 6/20

6:54 pm-3:16 pm

1 stop20h 22m

$304

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 6/21

9:42 pm-7:48 am

2 stops34h 06m

Philadelphia

Sat 6/28

12:00 pm-9:37 pm

1 stop9h 37m

$392

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Wed 6/18

5:29 pm-10:29 pm

1 stop5h 00m

Philadelphia

Sun 6/22

6:38 am-11:54 am

1 stop5h 16m

$1,441

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 5/16

9:42 pm-10:36 pm

2 stops24h 54m

$162

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 5/20

5:45 pm-6:59 pm

Nonstop1h 14m

$204

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 5/20

5:26 pm-12:46 am

1 stop7h 20m

$214

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 5/16

8:20 am-3:26 pm

1 stop7h 06m

$260

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Mon 5/12

11:00 am-7:29 pm

2 stops32h 29m

$1,968

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
ExpediaPrice Accuracy1 starTrust 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 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 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Philadelphia (average of $236). Flying from Washington, D.C. Dulles Intl Airport to Philadelphia in March is currently the most expensive (average of $295). 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 April 29, 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 morning tend to be the most expensive. A flight in the evening could potentially save you up to 50% on airfare.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Philadelphia

Explore weekly flight availability from Dulles Intl 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 April 29, 2025.

The most flights from IAD to PHL are scheduled on a Monday (11 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

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 April 29, 2025.
Peruse reviews from past customers who have flown with Delta, Qatar Airways and United Airlines from Washington, D.C. to Philadelphia to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Qatar Airways
7.4
Good
3,563 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
6.0
Okay
3,287 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 6 inbound flights from Washington, D.C. Dulles Intl per day.

  • What are the cheapest airlines flying 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.Alternate airlines to your destination round-trip include American Airlines and Frontier. Users have found that United Airlines is 43% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Philadelphia one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Philadelphia are United Airlines ($204), American Airlines ($214), and Frontier ($260).

  • 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 ANA (76%), Copa Airlines (75%) and GoJet (73%).

  • 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 $110. On average you can expect to pay $306. 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Philadelphia (average of $236). Flying from Washington, D.C. Dulles Intl Airport to Philadelphia in March is currently the most expensive (average of $295). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Vineland
Pottstown
Wildwood
King of Prussia
Reading
Cherry Hill
Exton
Ocean City
Essington
Chester
Middletown
Willow Grove
Newark
Millville
Ephrata
Camden
Dewey Beach
West Chester
Malvern
Dover

Browse thousands of different options on Cheapflights for your next trip

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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.
Reagan-National to Newark flights
Dulles Intl to Newark flights
Reagan-National to John F Kennedy Intl flights
Baltimore to Newark flights
Dulles Intl to John F Kennedy Intl flights
Dulles Intl to LaGuardia flights
Baltimore to LaGuardia flights
Reagan-National to LaGuardia flights
Dulles Intl to Pittsburgh flights
Baltimore to John F Kennedy Intl flights
Baltimore to Pittsburgh flights
Reagan-National to Pittsburgh flights
Reagan-National to Philadelphia flights
Baltimore to Philadelphia flights
Dulles Intl to Scranton flights
Dulles Intl to Harrisburg flights
Dulles Intl to Erie flights
Baltimore to Morgantown flights
Baltimore to Harrisburg flights
Reagan-National to Allentown flights
Baltimore to Allentown flights
Baltimore to Scranton flights
Reagan-National to Scranton flights
Dulles Intl to Elmira flights
Reagan-National to Erie flights
Baltimore to Erie flights
Baltimore to Johnstown flights
Dulles Intl to Allentown flights
Baltimore to Elmira flights
Reagan-National to Harrisburg flights
Reagan-National to Elmira flights
Baltimore to Hagerstown flights
Baltimore to Franklin flights
Baltimore to Lancaster flights
Baltimore to DuBois flights
Baltimore to Latrobe flights
Reagan-National to Williamsport flights
Baltimore to Altoona flights
Baltimore to Williamsport 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$179Average$304FlexibilityNo cancel feeOn-time69%

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