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 $289 and $1,824, respectively. United Airlines is currently priced 41% below the average price you’ll pay for this route.

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

The cheapest airline one-way is Sun Country Air, with whom users have recently found tickets for as low as $192. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Philadelphia to Washington, D.C. Dulles Intl Airport for a low price.

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 $1,174. The most popular route, (Philadelphia - Washington, D.C. Dulles Intl), can usually be booked for $179.

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

Consider Air China (89%), ANA (87%) or Ethiopian Air (86%) 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 Tuesday can be a cost-effective option. It’s possible to save up to 35% 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 December. 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 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 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 7 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.

$178+ 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	eDreams 3 stars
Round-trip from	$179 (United Airlines)
One-way from	$178 (Mytrip)
Popular in	February
Cheapest in	August
Average price	$407
Good round-trip deal	$638 or less
Good one-way deal	$274 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

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($64 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($17 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 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 April 30, 2025.

Wed 6/187:59 pmPHL - IAD

Nonstop1h 10mUnited Airlines

Wed 6/2512:55 pmIAD - PHL

Nonstop1h 14mUnited Airlines

Deal found 4/28

$179

Fri 5/304:00 pmPHL - IAD

1 stop22h 44mMultiple Airlines

Sat 6/79:43 pmIAD - PHL

2 stops34h 05mMultiple Airlines

Deal found 4/28

$269

Tue 5/61:44 pmPHL - IAD

1 stop5h 48mAmerican Airlines

Mon 5/265:02 amIAD - PHL

1 stop6h 34mAmerican Airlines

Deal found 4/29

$289

Tue 4/296:53 pmPHL - IAD

1 stop12h 50mAlaska Airlines

Tue 5/610:00 amIAD - PHL

1 stop19h 44mAlaska Airlines

Deal found 4/28

$1,441

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 April 30, 2025.

Wed 6/187:59 pmPHL - IAD

Nonstop1h 10mUnited Airlines

Wed 6/2512:55 pmIAD - PHL

Nonstop1h 14mUnited Airlines

Deal found 4/28

$179

Fri 5/304:00 pmPHL - IAD

1 stop22h 44mMultiple Airlines

Sat 6/79:43 pmIAD - PHL

2 stops34h 05mMultiple Airlines

Deal found 4/28

$269

Tue 5/61:44 pmPHL - IAD

1 stop5h 48mAmerican Airlines

Mon 5/265:02 amIAD - PHL

1 stop6h 34mAmerican Airlines

Deal found 4/29

$289

Fri 5/26:53 pmPHL - IAD

1 stop12h 50mAlaska Airlines

Sun 5/410:00 amIAD - PHL

1 stop19h 44mAlaska Airlines

Deal found 4/28

$1,824

Last-minute flights from Philadelphia to Dulles Intl
Discover last-minute flight deals from Philadelphia to Dulles Intl. Data last updated April 30, 2025 and is based on user searches.

Tue 5/66:15 amPHL - IAD

Nonstop1h 06mUnited Airlines

Mon 5/2612:55 pmIAD - PHL

Nonstop1h 14mUnited Airlines

Deal found 4/29

$249

Tue 5/61:44 pmPHL - IAD

1 stop5h 48mAmerican Airlines

Mon 5/265:02 amIAD - PHL

1 stop6h 34mAmerican Airlines

Deal found 4/29

$289

Tue 5/65:15 amPHL - IAD

3 stops30h 05mMultiple Airlines

Mon 5/263:13 pmIAD - PHL

3 stops31h 30mMultiple Airlines

Deal found 4/29

$508

Tue 5/2710:35 amPHL - IAD

Nonstop1h 05mUnited Airlines

Tue 6/312:55 pmIAD - PHL

Nonstop1h 14mUnited Airlines

Deal found 4/29

$179

Fri 5/304:00 pmPHL - IAD

1 stop22h 44mMultiple Airlines

Sat 6/79:43 pmIAD - PHL

2 stops34h 05mMultiple Airlines

Deal found 4/28

$269

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 April 30, 2025.

Thu 5/85:45 amPHL - IAD

2 stops39h 12mMultiple Airlines

Deal found 4/28

$178

Thu 8/712:11 pmPHL - IAD

1 stop24h 20mSun Country Air

Deal found 4/28

$192

Thu 6/123:35 pmPHL - IAD

1 stop4h 09mAmerican Airlines

Deal found 4/29

$214

Sun 5/256:30 amPHL - IAD

1 stop18h 00mUnited Airlines

Deal found 4/28

$231

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

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Wed 6/18

7:59 pm-9:09 pm

Nonstop1h 10m

Washington, D.C. Dulles Intl

Wed 6/25

12:55 pm-2:09 pm

Nonstop1h 14m

$179

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Fri 5/30

4:00 pm-2:44 pm

1 stop22h 44m

Washington, D.C. Dulles Intl

Sat 6/7

9:43 pm-7:48 am

2 stops34h 05m

$269

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Wed 6/18

6:08 am-12:38 pm

1 stop6h 30m

Washington, D.C. Dulles Intl

Wed 6/25

6:55 am-10:38 am

1 stop3h 43m

$289

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Thu 5/8

5:45 am-8:57 pm

2 stops39h 12m

$178

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Thu 8/7

12:11 pm-12:31 pm

1 stop24h 20m

$192

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Thu 6/12

3:35 pm-7:44 pm

1 stop4h 09m

$214

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Sun 5/25

6:30 am-12:30 am

1 stop18h 00m

$231

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 April.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy1 star	Trust Score*3 stars
Priceline	Price Accuracy2 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 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 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

Cheapflights partnered with top experts to bring you the best recommendations for 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

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.

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, 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 $373). 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 Wednesday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

The most flights from PHL to IAD are scheduled on a Tuesday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,961 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Sun Country Air

6.9

Okay

346 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 7 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 $289 and $1,824, respectively. United Airlines is currently priced 41% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Philadelphia to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airline one-way is Sun Country Air, with whom users have recently found tickets for as low as $192. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Philadelphia to Washington, D.C. Dulles Intl Airport for a low price.
What are the most reliable airlines from Philadelphia to Washington, D.C. Dulles Intl Airport?
Consider Air China (89%), ANA (87%) or Ethiopian Air (86%) 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 $1,174. The most popular route, (Philadelphia - Washington, D.C. Dulles Intl), can usually be booked for $179.
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 $373). 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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Linthicum Heights

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Laurel

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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$249	FlexibilityNo cancel fee	On-time69%

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$178+ 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 5/8. 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 April 30, 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 April 30, 2025.

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 April.

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

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.

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?

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 April 30, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Dulles Intl. Price data was last updated on March 30, 2025.

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

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

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

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 April 30, 2025.