What are the cheapest airlines flying 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 $179. Additional round-trip tickets that might be worth considering are offered by American Airlines and Alaska Airlines, with the lowest prices starting at $344 and $992, respectively. United Airlines is currently priced 45% below the average price you’ll pay for this route.

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 Wednesday mornings 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.

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 $148. On average you can expect to pay $1,116. The most popular route, (Philadelphia - Washington, D.C. Dulles Intl), can usually be booked for $189.

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

Consider Ethiopian Air (88%), Brussels Airlines (85%) or Air China (83%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to Washington, D.C. Dulles Intl Airport.

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

Users have found that leaving on a Saturday can be a cost-effective option. It’s possible to save up to 33% on your flight compared to booking on days when demand is much higher.

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

Flights from Philadelphia to Washington, D.C. Dulles Intl Airport lean towards being more expensive in February. Prices are generally better when you fly from Philadelphia to Washington, D.C. Dulles Intl Airport in November, with the cheapest ticket starting at $179.

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 4 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.

$168+ Save on Flights from Philadelphia to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Philadelphia to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$179 (United Airlines)
One-way from	$168 (Mytrip)
Popular in	February
Cheapest in	August
Average price	$462
Good round-trip deal	$548 or less
Good one-way deal	$238 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. 17% potential increase in price ($70 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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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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Find flight deals from Philadelphia to Dulles Intl

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 marzo 4, 2025.

mar. 3/256:30 amPHL - IAD

Nonstop1h 05mUnited Airlines

mar. 4/11:00 pmIAD - PHL

Nonstop1h 10mUnited Airlines

Deal found 3/3

$179

mar. 4/17:10 amPHL - IAD

3 stops28h 10mMultiple Airlines

mar. 4/88:25 amIAD - PHL

3 stops31h 08mMultiple Airlines

Deal found 3/4

$325

jue. 5/810:30 amPHL - IAD

1 stop6h 26mAmerican Airlines

lun. 5/125:02 amIAD - PHL

1 stop6h 34mAmerican Airlines

Deal found 3/2

$344

vie. 4/185:46 pmPHL - IAD

1 stop11h 48mAlaska Airlines

vie. 4/2510:00 amIAD - PHL

1 stop19h 44mAlaska Airlines

Deal found 3/3

$992

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 marzo 4, 2025.

mar. 3/256:30 amPHL - IAD

Nonstop1h 05mUnited Airlines

mar. 4/11:00 pmIAD - PHL

Nonstop1h 10mUnited Airlines

Deal found 3/3

$179

mar. 4/17:10 amPHL - IAD

3 stops28h 10mMultiple Airlines

mar. 4/88:25 amIAD - PHL

3 stops31h 08mMultiple Airlines

Deal found 3/4

$325

jue. 5/810:30 amPHL - IAD

1 stop6h 26mAmerican Airlines

lun. 5/125:02 amIAD - PHL

1 stop6h 34mAmerican Airlines

Deal found 3/2

$344

vie. 4/185:46 pmPHL - IAD

1 stop11h 48mAlaska Airlines

vie. 4/2510:00 amIAD - PHL

1 stop19h 44mAlaska Airlines

Deal found 3/3

$992

Last-minute flights from Philadelphia to Dulles Intl
Discover last-minute flight deals from Philadelphia to Dulles Intl. Data last updated marzo 4, 2025 and is based on user searches.

jue. 3/136:30 amPHL - IAD

Nonstop1h 05mUnited Airlines

jue. 3/208:40 amIAD - PHL

Nonstop1h 11mUnited Airlines

Deal found 3/4

$254

jue. 3/136:00 amPHL - IAD

1 stop7h 22mAmerican Airlines

vie. 3/216:27 amIAD - PHL

1 stop5h 08mAmerican Airlines

Deal found 3/4

$349

mar. 3/256:30 amPHL - IAD

Nonstop1h 05mUnited Airlines

mar. 4/11:00 pmIAD - PHL

Nonstop1h 10mUnited Airlines

Deal found 3/3

$179

mar. 4/17:10 amPHL - IAD

3 stops28h 10mMultiple Airlines

mar. 4/88:25 amIAD - PHL

3 stops31h 08mMultiple Airlines

Deal found 3/4

$325

vie. 4/185:46 pmPHL - IAD

1 stop11h 48mAlaska Airlines

vie. 4/2510:00 amIAD - PHL

1 stop19h 44mAlaska Airlines

Deal found 3/3

$992

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 marzo 4, 2025.

jue. 3/206:55 amPHL - IAD

3 stops29h 55mMultiple Airlines

Deal found 3/3

$168

jue. 4/106:15 amPHL - IAD

Nonstop1h 06mUnited Airlines

Deal found 3/3

$204

mar. 3/255:15 pmPHL - IAD

1 stop6h 43mAmerican Airlines

Deal found 3/3

$214

Find flights from Philadelphia to Dulles Intl within your budget

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

mar. 3/25

6:30 am-7:35 am

Nonstop1h 05m

Washington, D.C. Dulles Intl

mar. 4/1

1:00 pm-2:10 pm

Nonstop1h 10m

$179

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

mar. 4/1

7:10 am-11:20 am

3 stops28h 10m

Washington, D.C. Dulles Intl

mar. 4/8

8:25 am-3:33 pm

3 stops31h 08m

$325

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

jue. 5/8

10:30 am-4:56 pm

1 stop6h 26m

Washington, D.C. Dulles Intl

lun. 5/12

5:02 am-11:36 am

1 stop6h 34m

$344

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

vie. 4/18

5:46 pm-5:34 am

1 stop11h 48m

Washington, D.C. Dulles Intl

vie. 4/25

10:00 am-5:44 am

1 stop19h 44m

$992

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

jue. 3/20

6:55 am-12:50 pm

3 stops29h 55m

$168

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

jue. 4/10

6:15 am-7:21 am

Nonstop1h 06m

$204

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

mar. 3/25

5:15 pm-11:58 pm

1 stop6h 43m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

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 March.

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

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

Find out what our experts recommend to make the most of your Philadelphia to Washington, D.C. Dulles Intl Airport trip

Airports

PHL

For quick check-in, verify your airline's terminal before arriving at PHL. Terminals are spread out, so plan accordingly.

IAD

Use the Silver Line Metro for a cheap, 40-minute ride from IAD to Washington, D.C. The station is a five-minute walk from the terminal.

Our travel experts

Mark Chesnut

Expert on PHL

Ramsey Qubein

Expert on IAD

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.

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

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.

Travel insights for flights from Philadelphia to Dulles Intl

Get recent, data-driven insights about flights from Philadelphia to Dulles Intl including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Philadelphia to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Philadelphia to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $388). 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 in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 48% on airfare.

Rainfall in Dulles Intl by month

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.

Temperature in Dulles Intl by month

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).

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown Alaska Airlines, United Airlines and American Airlines from Philadelphia to Washington, D.C.. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,713 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,713 reviews

Alaska Airlines

8.0

Very good

9,713 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,678 reviews

Alaska Airlines

8.0

Very good

9,713 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,713 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.
What are the cheapest airlines flying 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 $179. Additional round-trip tickets that might be worth considering are offered by American Airlines and Alaska Airlines, with the lowest prices starting at $344 and $992, respectively. United Airlines is currently priced 45% 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 Ethiopian Air (88%), Brussels Airlines (85%) or Air China (83%) 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 $148. On average you can expect to pay $1,116. The most popular route, (Philadelphia - Washington, D.C. Dulles Intl), can usually be booked for $189.
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, August is the cheapest month in which you can book a flight from Philadelphia to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Philadelphia to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $388). 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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Springfield

Rockville

Gaithersburg

Fredericksburg

Silver Spring

Linthicum Heights

Woodbridge

Laurel

Falls Church

Easton

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Bowie

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National Harbor

Oxon Hill

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Top airline flying from Philadelphia to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$159	Average$253	FlexibilityNo cancel fee	On-time69%

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$168+ Cheap flights from Philadelphia (PHL) to Dulles Intl (IAD)

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 3/20. 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap 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

Find 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 marzo 4, 2025.

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 marzo 4, 2025.

Find flights from Philadelphia to Dulles Intl within your budget

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 March.

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

Find out what our experts recommend to make the most of your Philadelphia to Washington, D.C. Dulles Intl Airport trip

Airports

PHL

IAD

Our travel experts

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.

Travel insights for flights from Philadelphia to Dulles Intl

Get recent, data-driven insights about flights from Philadelphia to Dulles Intl including ideal travel times, pricing trends, and more.

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?

Find hourly flight availability from Philadelphia to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated marzo 4, 2025.

Rainfall in Dulles Intl by month

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

Temperature in Dulles Intl by month

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

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown Alaska Airlines, United Airlines and American Airlines from Philadelphia to Washington, D.C.. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines flying 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 Philadelphia?

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Alternative routes for Philadelphia to Dulles Intl

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Top airline flying from Philadelphia to Dulles Intl

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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 marzo 4, 2025.