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Cheap flights from Philadelphia to Washington, D.C. from $93

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 4/17. 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

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Cheap round-trip flights

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Frontier Logo
5:05 am - 12:36 am
PHL
-
IAD
19h 31m
1 stop
Frontier Logo
9:51 am - 8:10 am
IAD
-
PHL
22h 19m
1 stop
$151Frontier
Wed, May 13 - Mon, May 18
United Airlines Logo
10:32 am - 11:48 am
PHL
-
IAD
1h 16mnonstop
United Airlines Logo
12:55 pm - 2:10 pm
IAD
-
PHL
1h 15mnonstop
$199United Airlines
Fri, Jun 5 - Sun, Jun 7
Multiple Airlines Logo
7:00 am - 6:42 pm
PHL
-
IAD
11h 42m
1 stop
Multiple Airlines Logo
7:11 pm - 8:10 am
IAD
-
PHL
12h 59m
1 stop
$213Multiple Airlines
Thu, Apr 30 - Sun, May 3
United Airlines Logo
10:33 am - 11:46 am
PHL
-
IAD
1h 13mnonstop
United Airlines Logo
12:55 pm - 2:10 pm
IAD
-
PHL
1h 15mnonstop
$219United Airlines
Fri, Apr 3 - Mon, Apr 6
United Airlines Logo
7:45 pm - 8:55 pm
PHL
-
IAD
1h 10mnonstop
United Airlines Logo
5:35 pm - 6:54 pm
IAD
-
PHL
1h 19mnonstop
$220United Airlines
Fri, Apr 3 - Sun, Apr 5
Multiple Airlines Logo
5:45 am - 12:36 am
PHL
-
IAD
18h 51m
2 stops
Multiple Airlines Logo
10:51 am - 8:10 am
IAD
-
PHL
21h 19m
1 stop
$221Multiple Airlines
Wed, Apr 29 - Sat, May 2
Multiple Airlines Logo
9:17 am - 12:36 am
PHL
-
IAD
15h 19m
1 stop
Multiple Airlines Logo
6:00 am - 9:57 pm
IAD
-
PHL
15h 57m
1 stop
$222Multiple Airlines
Thu, Apr 16 - Mon, Apr 20
United Airlines Logo
10:35 am - 11:48 am
PHL
-
IAD
1h 13mnonstop
United Airlines Logo
8:30 am - 9:50 am
IAD
-
PHL
1h 20mnonstop
$234United Airlines
Fri, Mar 27 - Fri, Apr 3
Multiple Airlines Logo
5:05 am - 12:36 am
PHL
-
IAD
19h 31m
1 stop
Multiple Airlines Logo
2:52 pm - 2:29 pm
IAD
-
PHL
23h 37m
2 stops
$235Multiple Airlines
Wed, May 13 - Mon, May 18
Frontier Logo
9:17 am - 12:36 am
PHL
-
IAD
15h 19m
1 stop
Frontier Logo
6:19 pm - 11:51 am
IAD
-
PHL
17h 32m
2 stops
$236Frontier
Thu, Apr 16 - Mon, Apr 20

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

Our best Frontier deals on Philadelphia to Washington, D.C. Dulles Intl Airport flight tickets
Frontier
May 13
PHL5:05 amPhiladelphia
19h 31m
1 stop
IAD12:36 amWashington, D.C. Dulles Intl
May 18
IAD9:51 amWashington, D.C. Dulles Intl
22h 19m
1 stop
PHL8:10 amPhiladelphia
$151
Frontier
Apr 16
PHL9:17 amPhiladelphia
15h 19m
1 stop
IAD12:36 amWashington, D.C. Dulles Intl
Apr 20
IAD6:19 pmWashington, D.C. Dulles Intl
17h 32m
2 stops
PHL11:51 amPhiladelphia
$236
Frontier
Apr 30
PHL3:41 pmPhiladelphia
22h 30m
2 stops
IAD2:11 pmWashington, D.C. Dulles Intl
May 3
IAD7:11 pmWashington, D.C. Dulles Intl
12h 59m
1 stop
PHL8:10 amPhiladelphia
$243

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
Jun 5
PHL10:32 amPhiladelphia
1h 16m
IAD11:48 amWashington, D.C. Dulles Intl
Jun 7
IAD12:55 pmWashington, D.C. Dulles Intl
1h 15m
PHL2:10 pmPhiladelphia
$199
United Airlines
Apr 3
PHL10:33 amPhiladelphia
1h 13m
IAD11:46 amWashington, D.C. Dulles Intl
Apr 6
IAD12:55 pmWashington, D.C. Dulles Intl
1h 15m
PHL2:10 pmPhiladelphia
$219
United Airlines
Apr 3
PHL7:45 pmPhiladelphia
1h 10m
IAD8:55 pmWashington, D.C. Dulles Intl
Apr 5
IAD5:35 pmWashington, D.C. Dulles Intl
1h 19m
PHL6:54 pmPhiladelphia
$220

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 March 13, 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

Wed 5/13

5:05 am-12:36 am

1 stop19h 31m

Washington, D.C. Dulles Intl

Mon 5/18

9:51 am-8:10 am

1 stop22h 19m

$151

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Fri 6/5

10:32 am-11:48 am

Nonstop1h 16m

Washington, D.C. Dulles Intl

Sun 6/7

12:55 pm-2:10 pm

Nonstop1h 15m

$199

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Thu 4/30

7:00 am-6:42 pm

1 stop11h 42m

Washington, D.C. Dulles Intl

Sun 5/3

7:11 pm-8:10 am

1 stop12h 59m

$213
Quickest round-trip

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Fri 4/3

10:33 am-11:46 am

Nonstop1h 13m

Washington, D.C. Dulles Intl

Mon 4/6

12:55 pm-2:10 pm

Nonstop1h 15m

$219

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Fri 4/3

7:45 pm-8:55 pm

Nonstop1h 10m

Washington, D.C. Dulles Intl

Sun 4/5

5:35 pm-6:54 pm

Nonstop1h 19m

$220

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Wed 4/29

5:45 am-12:36 am

2 stops18h 51m

Washington, D.C. Dulles Intl

Sat 5/2

10:51 am-8:10 am

1 stop21h 19m

$221

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Thu 4/16

9:17 am-12:36 am

1 stop15h 19m

Washington, D.C. Dulles Intl

Mon 4/20

6:00 am-9:57 pm

1 stop15h 57m

$222

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Fri 3/27

10:35 am-11:48 am

Nonstop1h 13m

Washington, D.C. Dulles Intl

Fri 4/3

8:30 am-9:50 am

Nonstop1h 20m

$234

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Wed 5/13

5:05 am-12:36 am

1 stop19h 31m

Washington, D.C. Dulles Intl

Mon 5/18

2:52 pm-2:29 pm

2 stops23h 37m

$235

PhiladelphiaWashington, D.C.

PHL - IAD

PHLIAD

Philadelphia

Thu 4/16

9:17 am-12:36 am

1 stop15h 19m

Washington, D.C. Dulles Intl

Mon 4/20

6:19 pm-11:51 am

2 stops17h 32m

$236

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

Our data shows that Wednesday 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 $758. When flying out on a Thursday, 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 $926.

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 $791 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,136 on average. Flights to Washington, D.C. Dulles Intl Airport from Philadelphia at noon 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 flights?

There are 4 cabin classes available to choose from on Philadelphia to Washington, D.C. Dulles Intl 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 64% 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

$310

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 $310. The best round-trip flight deal from Philadelphia to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $581.
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

  • 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 $189Free CancellationRating
7.4
9,418 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 16 times per week, with 9,418 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 $189 (round-trip), much lower than the average airfare cost of $388 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
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Colonial Beach
Laurel
Towson
Gaithersburg
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Springfield
Bethesda
Fairfax
Sterling

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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