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Dulles Intl

$74+ Cheap flights from Philadelphia (PHL) to Dulles Intl (IAD)

PHL — IAD
Dec 4 — Dec 111
Fri 12/4
Fri 12/11
1 adult, Economy
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Cheap flight deals from Philadelphia to Dulles Intl

Cheapest flights from Philadelphia to Dulles Intl

Tue 12/86:31 pm -
1 stop16h 40m
Fri 12/1110:35 pm -
2 stops24h 51m
Deal found 11/2$170
Thu 12/37:34 am -
1 stop7h 14m
Sun 12/610:35 pm -
2 stops16h 51m
Deal found 10/30$224
Wed 11/259:32 pm -
2 stops17h 31m
Tue 12/110:33 pm -
1 stop14h 34m
Deal found 11/3$250
Mon 11/165:14 pm -
1 stop23h 58m
Thu 11/199:06 pm -
1 stop11h 38m
Deal found 11/2$261
Tue 11/1712:36 pm -
1 stop11h 07m
Sat 11/216:50 am -
2 stops16h 07m
Deal found 11/2$273
Fri 12/47:34 am -
1 stop7h 15m
Mon 12/73:34 pm -
1 stop9h 09m
Deal found 11/2$280

Find flight deals from Philadelphia to Dulles Intl

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$170
(Mytrip)

One-way from

$74
(Kiwi.com)

Popular in

May

Cheapest in

July

Average price

$399

Good round-trip deal

$551 or less

Good one-way deal

$288 or less
Provider with most accurate pricing for Philadelphia-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Washington, D.C. Dulles Intl flights.
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From Philadelphia to Washington, D.C. Dulles Intl
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One-way flight from Philadelphia to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 5% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from Philadelphia to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Philadelphia to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Fri 12/11

8:40 am-5:38 pm

1 stop8h 58m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$88

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Wed 11/11

8:30 am-5:12 pm

1 stop8h 42m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$130

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Sat 11/21

2:20 pm-10:02 pm

1 stop7h 42m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$160

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Mon 11/9

7:50 am-8:11 pm

1 stop12h 21m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$185
Quickest round-trip

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Sat 12/12

10:25 am-11:33 am

Nonstop1h 08m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$192

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Tue 12/1

6:00 am-7:08 am

Nonstop1h 08m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$192

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Wed 12/2

6:00 am-7:08 am

Nonstop1h 08m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$192

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Fri 12/11

3:10 pm-4:18 pm

Nonstop1h 08m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$192

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Thu 12/3

5:16 am-2:48 pm

2 stops9h 32m

Washington, D.C. Dulles Intl

Sun 12/6

10:35 pm-3:26 pm

2 stops16h 51m

$272

PhiladelphiaWashington, D.C.

PHL Philadelphia - IAD Washington, D.C. Dulles Intl

PHLIAD

Philadelphia

Thu 12/3

10:25 am-11:33 am

Nonstop1h 08m

Washington, D.C. Dulles Intl

Sun 12/6

5:50 pm-7:02 pm

Nonstop1h 12m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Philadelphia to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Dulles Intl in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 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 Philadelphia-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Washington, D.C. Dulles Intl Airport 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 Philadelphia-Washington, D.C. Dulles Intl Airport 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 Philadelphia to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Philadelphia with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Washington, D.C. Dulles Intl Airport

What is the cheapest time of day to fly from PHL to IAD?

One of the essential ways to save on airfare from Philadelphia to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 42% on airfare.

What is the cheapest day to fly from Philadelphia to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Philadelphia to Washington, D.C. Dulles Intl Airport flight should consider departing on Sunday at noon when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

Airfare is below average for this route at the moment.

Philadelphia to Washington, D.C. Dulles Intl Airport flights typically cost between $339 and $409 in December.
The cheapest round-trip price found within the last 5 days was $170 on Frontier (Dec 8-Dec 11).

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

Cheapflights partnered with top experts to bring you the best recommendations for your Philadelphia to Washington, D.C. Dulles Intl Airport 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 Dulles Intl

Read through reviews of airlines operating flights from Philadelphia to Washington, D.C. Dulles Intl Airport, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.3
Good
10,461 reviews

Food

6.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.3

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.3
Good
10,461 reviews
United Airlines
7.3
Good
10,461 reviews

Food

6.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.3

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

  • What airport do you fly from for flights from Philadelphia to Washington, D.C. Dulles Intl?

    If you book a flight to Washington, D.C. Dulles Intl from Philadelphia, you will be flying from Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 4 flights from Philadelphia to Washington, D.C. Dulles Intl per day from 1 airline.

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

    For as low as $309, Frontier can have you in Washington, D.C. Dulles Intl Airport from Philadelphia in 1h 08m. There are 134 mi between Philadelphia and Washington, D.C. Dulles Intl Airport. This flight may include one or multiple stops.

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

    Flying on United Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $206. United Airlines is currently priced 52% below the average price you’ll pay for this route.

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

    Consider Republic Airways (100%), ANA (94%) or Air China (88%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to Washington, D.C. Dulles Intl Airport.

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

    The cheapest flight price from Philadelphia to Washington, D.C. Dulles Intl Airport is $188. On average you can expect to pay $1,065. The most popular route, (Philadelphia - Washington, D.C. Dulles Intl), can usually be booked for $309.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Philadelphia to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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
Alexandria
Chantilly
Woodbridge
Arlington
Sterling
Lanham
Reston
Herndon
Hyattsville
Springfield
Fredericksburg
Falls Church
Towson
Silver Spring
Rockville
Oxon Hill
Laurel
Clinton
Hunt Valley
Owings Mills

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Philadelphia to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$206Average$489FlexibilityNo cancel feeOn-time69%

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