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 45% cheaper than the other options available to this destination.

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

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

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.

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).

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 $218. On average you can expect to pay $460. The most popular route, (Washington, D.C. Dulles Intl - Philadelphia), can usually be booked for $179.

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

Flying to your destination on a Friday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Philadelphia. Check prices with Cheapflights to find a great deal for your trip.

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

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, April can be a great choice for travel to Philadelphia. Flights to Philadelphia from Washington, D.C. Dulles Intl Airport in April are about $352 on average during April, but can be found for as low as $179.

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

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.

$148+ Flights from Washington, D.C. Dulles Intl Airport to Philadelphia

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Cheap flight deals from Dulles Intl to Philadelphia

Round-trip from	$179 (United Airlines)
One-way from	$148 (Mytrip)
Popular in	January
Cheapest in	February
Average price	$369
Good round-trip deal	$457 or less
Good one-way deal	$338 or less

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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High demand for flights, 2% potential price rise

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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).

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Average for round-trip flights in July 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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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 July 28, 2025.

Mon 9/88:21 amIAD - PHL

Nonstop1h 12mUnited Airlines

Mon 9/157:58 pmPHL - IAD

Nonstop1h 07mUnited Airlines

Deal found 7/26

$179

Thu 8/214:56 pmIAD - PHL

2 stops17h 00mMultiple Airlines

Sun 8/249:59 pmPHL - IAD

2 stops17h 24mMultiple Airlines

Deal found 7/26

$255

Thu 8/146:34 amIAD - PHL

1 stop4h 10mAmerican Airlines

Thu 8/216:08 amPHL - IAD

1 stop6h 40mAmerican Airlines

Deal found 7/27

$289

Best flights from Dulles Intl to Philadelphia
Discover carefully curated flight deals from Dulles Intl to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2025.

Mon 9/88:21 amIAD - PHL

Nonstop1h 12mUnited Airlines

Mon 9/157:58 pmPHL - IAD

Nonstop1h 07mUnited Airlines

Deal found 7/26

$179

Thu 8/214:56 pmIAD - PHL

2 stops17h 00mMultiple Airlines

Sun 8/249:59 pmPHL - IAD

2 stops17h 24mMultiple Airlines

Deal found 7/26

$255

Fri 8/16:35 amIAD - PHL

1 stop4h 02mAmerican Airlines

Sat 8/26:35 pmPHL - IAD

1 stop5h 23mAmerican Airlines

Deal found 7/27

$319

Sat 8/94:07 pmIAD - PHL

1 stop8h 14mFrontier

Mon 8/115:30 amPHL - IAD

1 stop8h 19mFrontier

Deal found 7/28

$326

Last-minute flights from Dulles Intl to Philadelphia
Discover last-minute flight deals from Dulles Intl to Philadelphia. Data last updated July 28, 2025 and is based on user searches.

Sun 8/310:05 pmIAD - PHL

Nonstop1h 09mUnited Airlines

Sun 8/106:05 amPHL - IAD

Nonstop1h 10mUnited Airlines

Deal found 7/27

$194

Sun 8/36:35 amIAD - PHL

1 stop4h 02mAmerican Airlines

Sun 8/106:08 amPHL - IAD

1 stop6h 40mAmerican Airlines

Deal found 7/27

$404

Sun 8/311:58 amIAD - PHL

2 stops20h 06mMultiple Airlines

Sun 8/106:00 amPHL - IAD

2 stops27h 23mMultiple Airlines

Deal found 7/27

$430

Thu 8/146:34 amIAD - PHL

1 stop4h 10mAmerican Airlines

Thu 8/216:08 amPHL - IAD

1 stop6h 40mAmerican Airlines

Deal found 7/27

$289

Fri 8/1510:05 pmIAD - PHL

Nonstop1h 09mUnited Airlines

Fri 8/227:58 pmPHL - IAD

Nonstop1h 07mUnited Airlines

Deal found 7/27

$184

Thu 8/214:56 pmIAD - PHL

2 stops17h 00mMultiple Airlines

Sun 8/249:59 pmPHL - IAD

2 stops17h 24mMultiple Airlines

Deal found 7/26

$255

One-way flights from Dulles Intl to Philadelphia
Search for one-way flight options from Dulles Intl to Philadelphia. Find affordable one-way fares based on user searches. Data last updated July 28, 2025.

Sun 8/247:10 pmIAD - PHL

2 stops20h 53mMultiple Airlines

Deal found 7/27

$148

Sat 8/1610:05 pmIAD - PHL

Nonstop1h 09mUnited Airlines

Deal found 7/26

$204

Fri 8/227:25 pmIAD - PHL

1 stop12h 33mAmerican Airlines

Deal found 7/27

$209

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Mon 9/8

8:21 am-9:33 am

Nonstop1h 12m

Philadelphia

Mon 9/15

7:58 pm-9:05 pm

Nonstop1h 07m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 8/21

4:56 pm-9:56 am

2 stops17h 00m

Philadelphia

Sun 8/24

9:59 pm-3:23 pm

2 stops17h 24m

$255

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 8/14

6:34 am-10:44 am

1 stop4h 10m

Philadelphia

Thu 8/21

6:08 am-12:48 pm

1 stop6h 40m

$289

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sun 8/24

7:10 pm-4:03 pm

2 stops20h 53m

$148

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 8/16

10:05 pm-11:14 pm

Nonstop1h 09m

$204

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 8/22

7:25 pm-7:58 am

1 stop12h 33m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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

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

Airports

IAD

For a smooth departure, use the Aerotrain to reach distant gates quickly. Pay attention to signage as it's not a loop system.

PHL

To reach downtown, SEPTA trains are efficient. Stations are near Terminals A, B, C/D, and E/F, with service from 5 a.m. to midnight.

Our travel experts

Mark Chesnut

Expert on PHL

Ramsey Qubein

Expert on IAD

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?

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 evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 45% on airfare.

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

The most flights from IAD to PHL 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 (6 on average).

Reviews of airlines servicing Philadelphia

Get a feel of what it's like to fly with United Airlines, American Airlines, and Frontier from Washington, D.C. Dulles Intl Airport to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,893 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,893 reviews

United Airlines

7.4

Good

8,893 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

American Airlines

7.2

Good

10,000 reviews

United Airlines

7.4

Good

8,893 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Frontier

5.9

Fair

3,238 reviews

United Airlines

7.4

Good

8,893 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

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 10 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 45% cheaper than the other options available to this destination.
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 (75%), Mesa Airlines (74%) and Air Canada (71%).
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 $218. On average you can expect to pay $460. 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

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Top airline flying from Dulles Intl to Philadelphia

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$179	Average$306	FlexibilityNo cancel fee	On-time69%

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$148+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Philadelphia with Cheapflights

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Cheap flight deals from Dulles Intl to Philadelphia

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Find flight deals from Dulles Intl to Philadelphia

Cheapest flights from Dulles Intl to PhiladelphiaExplore 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 July 28, 2025.

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 July 28, 2025.

Cheapflights Fare Finder

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

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

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

Airports

IAD

PHL

Our travel experts

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.

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?

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 July 28, 2025.

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

Reviews of airlines servicing Philadelphia

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?

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Philadelphia round-trip?

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

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

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

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

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

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

Traveling to a place near Philadelphia?

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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.

Top airline flying from Dulles Intl to Philadelphia

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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 July 28, 2025.