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 $239. United Airlines is currently priced 49% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 $153. On average you can expect to pay $697. The most popular route, (Philadelphia - Washington, D.C. Dulles Intl), can usually be booked for $289.

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

Consider ANA (92%), Air China (89%) or Mesa Airlines (85%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to Washington, D.C. Dulles Intl Airport.

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.

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 3 flights from Philadelphia to Washington, D.C. Dulles Intl per day from 1 airline.

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.

$92+ Cheap Flights from Philadelphia to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Philadelphia to Dulles Intl

Cheapest

Best

Last-minute

One-way

Cheapest flights from Philadelphia to Dulles Intl
Explore the most affordable flight options available from Philadelphia to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.

Tue 10/208:30 am -

1 stop8h 43m

Tue 10/279:06 pm -

1 stop10h 15m

Deal found 9/20

$92

Wed 11/1112:36 pm -

1 stop11h 07m

Mon 11/167:40 am -

1 stop23h 41m

Deal found 9/22

$111

Sat 10/318:39 am -

1 stop8h 33m

Mon 11/29:06 pm -

1 stop10h 15m

Deal found 9/20

$132

Tue 11/105:22 pm -

1 stop6h 21m

Fri 11/139:06 pm -

1 stop10h 15m

Deal found 9/23

$136

Sat 10/318:39 am -

1 stop8h 33m

Sat 10/319:06 pm -

1 stop11h 05m

Deal found 9/20

$149

Mon 10/195:22 pm -

1 stop6h 59m

Mon 10/269:06 pm -

1 stop10h 15m

Deal found 9/21

$151

Best flights from Philadelphia to Dulles Intl
Discover carefully curated flight deals from Philadelphia to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.

Sat 10/175:20 pm -

1 stop7h 01m

Sat 10/247:50 am -

2 stops16h 48m

Deal found 9/19

$228

Wed 11/1110:30 am -

Nonstop1h 10m

Mon 11/168:36 am -

Nonstop1h 13m

Deal found 9/23

$289

Sun 10/258:02 pm -

2 stops14h 15m

Mon 10/269:06 pm -

1 stop10h 15m

Deal found 9/21

$281

Thu 11/57:40 pm -

Nonstop1h 13m

Sun 11/810:15 pm -

Nonstop1h 15m

Deal found 9/19

$289

Wed 3/310:15 am -

Nonstop1h 08m

Mon 3/812:45 pm -

Nonstop1h 06m

Deal found 9/19

$289

Thu 11/512:10 pm -

2 stops22h 11m

Sun 11/89:06 pm -

1 stop10h 15m

Deal found 9/18

$297

Fri 10/237:30 pm -

Nonstop1h 19m

Sun 10/258:36 am -

Nonstop1h 13m

Deal found 9/22

$289

Fri 10/1610:40 am -

Nonstop1h 09m

Mon 10/1910:16 pm -

Nonstop1h 14m

Deal found 9/19

$289

Thu 10/1510:40 am -

Nonstop1h 09m

Sun 10/188:30 am -

Nonstop1h 03m

Deal found 9/23

$289

Wed 10/77:30 pm -

Nonstop1h 19m

Sun 10/1110:16 pm -

Nonstop1h 14m

Deal found 9/22

$319

Sat 10/3110:30 am -

Nonstop1h 10m

Mon 11/21:00 pm -

Nonstop1h 16m

Deal found 9/20

$319

Last-minute flights from Philadelphia to Dulles Intl
Discover last-minute flight deals from Philadelphia to Dulles Intl. Data last updated September 23, 2026 and is based on user searches.

Sat 10/175:20 pm -

1 stop7h 01m

Sat 10/247:50 am -

1 stop15h 21m

Deal found 9/19

$163

Mon 10/195:22 pm -

1 stop6h 59m

Mon 10/269:06 pm -

1 stop10h 15m

Deal found 9/21

$151

Tue 10/208:30 am -

1 stop8h 43m

Tue 10/279:06 pm -

1 stop10h 15m

Deal found 9/20

$92

Sat 10/318:39 am -

1 stop8h 33m

Mon 11/29:06 pm -

1 stop10h 15m

Deal found 9/20

$132

Sat 10/318:39 am -

1 stop8h 33m

Sat 10/319:06 pm -

1 stop11h 05m

Deal found 9/20

$149

One-way flights from Philadelphia to Dulles Intl
Search for one-way flight options from Philadelphia to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.

Fri 11/137:26 pm -

2 stops28h 17m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/23

$96

Mon 12/216:48 pm -

1 stop13h 03m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/19

$111

Fri 11/135:45 pm -

1 stop16h 36m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/23

$112

Mon 10/57:15 am -

2 stops10h 41m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/21

$122

Mon 10/53:30 pm -

1 stop18h 47m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/21

$126

Fri 10/305:22 pm -

1 stop23h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/21

$127

Fri 10/236:27 pm -

2 stops22h 46m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/22

$128

Thu 10/156:03 pm -

1 stop6h 18m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/20

$135

Thu 10/2212:35 pm -

1 stop11h 46m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/23

$140

Sat 10/312:40 pm -

1 stop11h 30m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/18

$157

Find flight deals from Philadelphia to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$92 (Mytrip)
One-way from	$40 (Mytrip)
Popular in	October
Cheapest in	January
Average price	$546
Good round-trip deal	$630 or less
Good one-way deal	$273 or less

Provider with most accurate pricing for Philadelphia-Washington, D.C. Dulles Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Philadelphia-Washington, D.C. Dulles Intl flights.

Search Deals

From Philadelphia to Washington, D.C. Dulles Intl

Search Deals

One-way flight from Philadelphia to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($116 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a round-trip flight from Philadelphia to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from Philadelphia to Washington, D.C. Dulles Intl.

Search Deals

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

Mon 12/21

6:48 pm-7:51 am

1 stop13h 03m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$111

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Tue 10/6

8:41 am-12:10 am

1 stop15h 29m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$173

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Thu 10/22

10:40 am-11:49 am

Nonstop1h 09m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Fri 1/1

7:37 pm-8:55 pm

Nonstop1h 18m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Wed 12/30

7:37 pm-8:55 pm

Nonstop1h 18m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

Quickest round-trip

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Sun 10/11

10:38 am-11:34 am

Nonstop0h 56m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Sun 12/20

2:55 pm-4:13 pm

Nonstop1h 18m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Thu 10/15

6:15 am-7:31 am

Nonstop1h 16m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Tue 12/29

10:37 am-11:50 am

Nonstop1h 13m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

PhiladelphiaWashington, D.C.

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

PHLIAD

Philadelphia

Sat 12/26

10:37 am-11:50 am

Nonstop1h 13m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/19

Showing 1-10 of 23 resultsSorted by cheapest first

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 September.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust 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.

PHL-IAD

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 Philadelphia to Washington, D.C. Dulles Intl Airport

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

Currently, January is the cheapest month in which you can book a flight from Philadelphia to Washington, D.C. Dulles Intl Airport (average of $239). Flying from Philadelphia to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of $823). 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 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.

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

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.

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 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

7.4

Good

10,226 reviews

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

7.4

Good

10,226 reviews

United Airlines

7.4

Good

10,226 reviews

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 3 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 $289, Frontier can have you in Washington, D.C. Dulles Intl Airport from Philadelphia in 1h 10m. 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 $239. United Airlines is currently priced 49% 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 ANA (92%), Air China (89%) or Mesa Airlines (85%) 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 $153. On average you can expect to pay $697. The most popular route, (Philadelphia - Washington, D.C. Dulles Intl), can usually be booked for $289.
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.
What is the cheapest month to book a flight from Philadelphia to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from Philadelphia to Washington, D.C. Dulles Intl Airport (average of $239). Flying from Philadelphia to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of $823). 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

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Owings Mills

Lanham

Tysons

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Woodbridge

Reston

Herndon

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Rockville

Fredericksburg

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Elmira to Reagan-National flights

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Hagerstown to Baltimore flights

Top airline flying from Philadelphia to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$239	Average$489	FlexibilityNo cancel fee	On-time69%

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$92+ Cheap flights from Philadelphia (PHL) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Philadelphia to Dulles Intl with Cheapflights

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Cheap flight deals from Philadelphia to Dulles Intl

Cheapest flights from Philadelphia to Dulles IntlExplore the most affordable flight options available from Philadelphia to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.

Explore the most affordable flight options available from Philadelphia to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.

Best flights from Philadelphia to Dulles IntlDiscover carefully curated flight deals from Philadelphia to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.

Discover carefully curated flight deals from Philadelphia to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.

Last-minute flights from Philadelphia to Dulles IntlDiscover last-minute flight deals from Philadelphia to Dulles Intl. Data last updated September 23, 2026 and is based on user searches.

Discover last-minute flight deals from Philadelphia to Dulles Intl. Data last updated September 23, 2026 and is based on user searches.

One-way flights from Philadelphia to Dulles IntlSearch for one-way flight options from Philadelphia to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.

Search for one-way flight options from Philadelphia to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.

Find flight deals from Philadelphia to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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.

Compare providers for flights from Philadelphia to Dulles Intl

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 Philadelphia to Dulles Intl in September.

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.

Cheapflights Insights

What is the cheapest month to book a 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?

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

Our travel experts

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.

Related info for your journey

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

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

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

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

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

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

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

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

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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Philadelphia to Dulles Intl

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Other flights to Dulles Intl

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Philadelphia and Dulles Intl flights

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Other flights from Philadelphia

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Cheapest flights from Philadelphia to Dulles Intl
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Best flights from Philadelphia to Dulles Intl
Discover carefully curated flight deals from Philadelphia to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.

Last-minute flights from Philadelphia to Dulles Intl
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One-way flights from Philadelphia to Dulles Intl
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