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Cheap flights from Philadelphia to Washington, D.C. from $87

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Washington, D.C. departing on 7/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Philadelphia to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:30 am - 10:52 pm
PHL
-
IAD
14h 22m
1 stop
Frontier Logo
6:20 am - 12:26 pm
IAD
-
PHL
6h 06m
1 stop
$167Frontier
Sat, Aug 22 - Wed, Aug 26
Frontier Logo
8:30 am - 4:40 pm
PHL
-
IAD
8h 10m
1 stop
Frontier Logo
8:33 pm - 7:15 am
IAD
-
PHL
10h 42m
1 stop
$171Frontier
Tue, Aug 4 - Tue, Aug 11
Frontier Logo
6:30 am - 5:14 pm
PHL
-
IAD
10h 44m
1 stop
Frontier Logo
7:49 am - 10:28 pm
IAD
-
PHL
14h 39m
1 stop
$173Frontier
Wed, Jul 15 - Wed, Jul 22
Frontier Logo
8:30 am - 5:14 pm
PHL
-
IAD
8h 44m
1 stop
Frontier Logo
8:33 pm - 7:15 am
IAD
-
PHL
10h 42m
1 stop
$183Frontier
Wed, Jul 15 - Wed, Jul 22
Frontier Logo
6:30 am - 4:34 pm
PHL
-
IAD
10h 04m
1 stop
Frontier Logo
8:33 pm - 8:39 am
IAD
-
PHL
12h 06m
1 stop
$189Frontier
Sat, Jul 18 - Fri, Jul 31
Frontier Logo
4:40 pm - 4:40 pm
PHL
-
IAD
24h 00m
1 stop
Frontier Logo
8:33 pm - 7:15 am
IAD
-
PHL
10h 42m
1 stop
$196Frontier
Mon, Aug 3 - Mon, Aug 10
Frontier Logo
4:45 pm - 10:52 pm
PHL
-
IAD
6h 07m
1 stop
Frontier Logo
8:39 pm - 7:15 am
IAD
-
PHL
10h 36m
1 stop
$197Frontier
Sat, Aug 22 - Wed, Aug 26
Frontier Logo
5:28 pm - 12:28 am
PHL
-
IAD
7h 00m
1 stop
Frontier Logo
7:00 am - 1:12 pm
IAD
-
PHL
6h 12m
1 stop
$198Frontier
Thu, Oct 1 - Tue, Oct 6
Frontier Logo
4:30 pm - 10:55 pm
PHL
-
IAD
6h 25m
1 stop
Frontier Logo
8:33 pm - 7:15 am
IAD
-
PHL
10h 42m
1 stop
$199Frontier
Sat, Jul 18 - Sat, Jul 25
Frontier Logo
4:45 pm - 5:14 pm
PHL
-
IAD
24h 29m
1 stop
Frontier Logo
8:39 pm - 7:15 am
IAD
-
PHL
10h 36m
1 stop
$208Frontier
Mon, Aug 24 - Thu, Aug 27

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American Airlines flights from Philadelphia to Washington, D.C. Dulles Intl Airport

Our best American Airlines deals on Philadelphia to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Jul 10
PHL3:50 pmPhiladelphia
6h 15m
1 stop
IAD10:05 pmWashington, D.C. Dulles Intl
Jul 12
IAD6:33 amWashington, D.C. Dulles Intl
4h 39m
1 stop
PHL11:12 amPhiladelphia
$258
American Airlines
Aug 22
PHL10:30 amPhiladelphia
6h 34m
1 stop
IAD5:04 pmWashington, D.C. Dulles Intl
Aug 27
IAD7:57 amWashington, D.C. Dulles Intl
4h 48m
1 stop
PHL12:45 pmPhiladelphia
$259
American Airlines
Jul 10
PHL1:49 pmPhiladelphia
5h 51m
1 stop
IAD7:40 pmWashington, D.C. Dulles Intl
Jul 12
IAD6:33 amWashington, D.C. Dulles Intl
4h 39m
1 stop
PHL11:12 amPhiladelphia
$274

United Airlines flights from Philadelphia to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Philadelphia to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Jul 15
PHL6:10 amPhiladelphia
1h 09m
IAD7:19 amWashington, D.C. Dulles Intl
Jul 22
IAD10:10 pmWashington, D.C. Dulles Intl
1h 10m
PHL11:20 pmPhiladelphia
$239
United Airlines
Jul 18
PHL6:10 amPhiladelphia
1h 09m
IAD7:19 amWashington, D.C. Dulles Intl
Jul 31
IAD12:55 pmWashington, D.C. Dulles Intl
1h 15m
PHL2:10 pmPhiladelphia
$254
United Airlines
Jul 8
PHL3:10 pmPhiladelphia
1h 08m
IAD4:18 pmWashington, D.C. Dulles Intl
Jul 12
IAD8:35 amWashington, D.C. Dulles Intl
1h 10m
PHL9:45 amPhiladelphia
$269

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 23, 2026.
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 - IAD

PHLIAD

Philadelphia

Sat 8/22

8:30 am-10:52 pm

1 stop14h 22m

Washington, D.C. Dulles Intl

Wed 8/26

6:20 am-12:26 pm

1 stop6h 06m

$167

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Tue 8/4

8:30 am-4:40 pm

1 stop8h 10m

Washington, D.C. Dulles Intl

Tue 8/11

8:33 pm-7:15 am

1 stop10h 42m

$171

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Wed 7/15

6:30 am-5:14 pm

1 stop10h 44m

Washington, D.C. Dulles Intl

Wed 7/22

7:49 am-10:28 pm

1 stop14h 39m

$173

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Wed 7/15

8:30 am-5:14 pm

1 stop8h 44m

Washington, D.C. Dulles Intl

Wed 7/22

8:33 pm-7:15 am

1 stop10h 42m

$183

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Sat 7/18

6:30 am-4:34 pm

1 stop10h 04m

Washington, D.C. Dulles Intl

Fri 7/31

8:33 pm-8:39 am

1 stop12h 06m

$189

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Mon 8/3

4:40 pm-4:40 pm

1 stop24h 00m

Washington, D.C. Dulles Intl

Mon 8/10

8:33 pm-7:15 am

1 stop10h 42m

$196

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Sat 8/22

4:45 pm-10:52 pm

1 stop6h 07m

Washington, D.C. Dulles Intl

Wed 8/26

8:39 pm-7:15 am

1 stop10h 36m

$197
Quickest round-trip

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Thu 10/1

5:28 pm-12:28 am

1 stop7h 00m

Washington, D.C. Dulles Intl

Tue 10/6

7:00 am-1:12 pm

1 stop6h 12m

$198

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Sat 7/18

4:30 pm-10:55 pm

1 stop6h 25m

Washington, D.C. Dulles Intl

Sat 7/25

8:33 pm-7:15 am

1 stop10h 42m

$199

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Mon 8/24

4:45 pm-5:14 pm

1 stop24h 29m

Washington, D.C. Dulles Intl

Thu 8/27

8:39 pm-7:15 am

1 stop10h 36m

$208

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Philadelphia to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Philadelphia and Washington, D.C. Dulles Intl Airport?

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

In general, September is the cheapest month to fly from Philadelphia to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $239.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $775. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to Washington, D.C. Dulles Intl Airport for around $1,121.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Philadelphia in the morning is the least expensive time of day to depart. momondo users have found prices as low as $737 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,198 on average. Flights to Washington, D.C. Dulles Intl Airport from Philadelphia in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Philadelphia to Washington, D.C. Dulles Intl flight route?

Fly from Philadelphia to Washington, D.C. Dulles Intl for the best Philadelphia - Washington, D.C. Dulles Intl flight prices

What cabin class options are available on Philadelphia to Washington, D.C. Dulles Intl Airport flights?

There are 4 cabin classes available to choose from on Philadelphia to Washington, D.C. Dulles Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Philadelphia to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 80% on your flight if you consider stops on a Philadelphia to Washington, D.C. Dulles Intl Airport flight.

When to book flights from Philadelphia to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Philadelphia to Washington, D.C. Dulles Intl Airport (PHL to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Washington, D.C. Dulles Intl Airport

Best Price Found

$358

Fastest flight time

1h 08m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Philadelphia in the past 72 hours is $358. The best round-trip flight deal from Philadelphia to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $621.
The fastest flight from Philadelphia to Washington, D.C. Dulles Intl Airport takes 1h 08m
Direct flights go from Philadelphia to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Philadelphia to Washington, D.C. Dulles Intl Airport

  • How far is Philadelphia to Washington, D.C. Dulles Intl by plane?

    The straight-line distance from Philadelphia to Washington, D.C. Dulles Intl is 140.7 mi. 1h 08m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Philadelphia Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Philadelphia Airport to Washington, D.C. Dulles Intl Airport refresh daily.

  • How many operators does momondo search for flights from Philadelphia Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Philadelphia Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Philadelphia to Washington, D.C. Dulles Intl Airport?

  • What is the most popular airline from Philadelphia to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Philadelphia to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Philadelphia to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $206Free CancellationRating
7.4
9,875 reviews
Search United Airlines flights

  • United Airlines Flights From Philadelphia to Washington, D.C. Dulles Intl Airport

    United Airlines flies from Philadelphia to Washington, D.C. Dulles Intl Airport around 19 times per week, with 9,875 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Philadelphia to Washington, D.C. Dulles Intl Airport in the last 72 hours was $206 (round-trip), much lower than the average airfare cost of $487 for United Airlines flights on this route.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Colonial Beach
Linthicum Heights
Rockville
Silver Spring
Towson
Manassas
Sterling
Tysons
Springfield
Fairfax

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Philadelphia to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Philadelphia to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Philadelphia with this policy.

How can momondo help me find flights from Philadelphia to Washington, D.C.?

momondo provides multiple filters to help you find the best flight to Washington, D.C. from Philadelphia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Philadelphia to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from Philadelphia are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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