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PHL - IAD

Find cheap flights from Philadelphia to Washington Dulles Airport from $137

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Dulles Intl departing on 4/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sun 4/28
Sun 5/5

Search hundreds of travel sites at once for deals on flights to Washington Dulles Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Washington, D.C., as well as popular online travel agencies
In the last 7 days travelers have searched 46,342,885 times on KAYAK, and here is why:

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Cheap flight deals from Philadelphia to Dulles Intl

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
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5:30 pm - 11:18 pmPHL-IAD
5h 48m1 stop
5:29 pm - 11:19 pmIAD-PHL
5h 50m1 stop
$205United Airlines
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Thu, Apr 18 - Mon, Apr 22
10:15 am - 11:23 amPHL-IAD
1h 08mnonstop
12:45 pm - 1:52 pmIAD-PHL
1h 07mnonstop
$217United Airlines
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Wed, Jul 10 - Sat, Jul 13
1:06 pm - 9:08 pmPHL-IAD
8h 02m1 stop
5:33 pm - 8:55 amIAD-PHL
15h 22m2 stops
Thu, Apr 11 - Thu, Apr 18
3:39 pm - 7:42 pmPHL-IAD
4h 03m1 stop
5:04 am - 9:21 amIAD-PHL
4h 17m1 stop
$305American Airlines
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Tue, Apr 30 - Wed, May 1
11:45 am - 5:04 pmPHL-IAD
5h 19m1 stop
9:18 am - 4:30 pmIAD-PHL
7h 12m1 stop
$365American Airlines
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Wed, Jul 10 - Sat, Jul 13
6:50 am - 9:08 pmPHL-IAD
14h 18m2 stops
5:20 pm - 7:37 amIAD-PHL
14h 17m3 stops
Sun, Apr 14 - Fri, Apr 19
12:55 pm - 4:31 pmPHL-IAD
27h 36m1 stop
12:03 pm - 11:23 amIAD-PHL
23h 20m1 stop
$452Sun Country Air
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Sun, Jun 2 - Thu, Jun 6
4:10 pm - 10:57 amPHL-IAD
18h 47m1 stop
1:53 pm - 11:20 amIAD-PHL
21h 27m1 stop
$487Sun Country Air
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Mon, Jul 8 - Sun, Jul 28
7:00 am - 4:10 pmPHL-IAD
33h 10m2 stops
10:55 am - 8:05 pmIAD-PHL
33h 10m2 stops
$3,681Qatar Airways
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Sun, Aug 11 - Sun, Aug 25
6:35 pm - 4:10 pmPHL-IAD
45h 35m2 stops
10:55 am - 7:50 pmIAD-PHL
32h 55m2 stops
$3,809Qatar Airways
Find Deal
Sun, Apr 14 - Fri, Apr 19

Flights from Philadelphia to Dulles Intl - Travel Insights & Trends

Get data-powered insights and trends into flights from Philadelphia to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Philadelphia to Washington Dulles Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Washington Dulles Airport from Philadelphia were found on Sun Country Air ($184) and American Airlines ($191), and the lowest round-trip tickets were found on United Airlines ($205) and American Airlines ($305).

Which cabin class options are there for flights between Philadelphia and Washington, D.C. Dulles Intl Airport?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 2 cabin class options for the route. These are Business and Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Philadelphia to Washington Dulles Airport take?

There are no direct flights for this route. The shortest travel duration to get to Washington Dulles Airport from Philadelphia is 1h 08m.

Good to know

Cheapest flight

$137
Flight from Philadelphia to Washington Dulles Airport

When to book flights from Philadelphia to Dulles Intl

Are your dates flexible? Find out the best times to travel from Philadelphia to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Philadelphia to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from Philadelphia to Washington, D.C. Dulles Intl Airport was $137 for a one-way ticket and $205 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Washington Dulles Airport?

    A passport is not required to fly from Philadelphia to Washington Dulles Airport.

  • Which airlines offer Wi-Fi service onboard planes from Philadelphia to Washington Dulles Airport?

    Only American Airlines offers inflight Wi-Fi service on the Philadelphia to Washington Dulles Airport flight route.

  • Which aircraft models fly most regularly from Philadelphia to Washington Dulles Airport?

    The Airbus A321-100/200 is the aircraft model that flies most regularly on the Philadelphia to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Philadelphia to Washington Dulles Airport?

    oneworld, and Star Alliance are the airline alliances operating flights between Philadelphia and Washington Dulles Airport, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Philadelphia to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from PHL to Washington Dulles Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $237 or less one-way and $608 or less round-trip.

Book cheap flights from Philadelphia to Washington, D.C.

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Philadelphia to Washington, D.C. found on KAYAK in the last 72 hours.
4/29Mon
1 stop
9h 43mPHL-IAD
$137
4/8Mon
1 stop
12h 14mPHL-IAD
$145
4/26Fri
1 stop
9h 43mPHL-IAD
$182
6/12Wed
1 stopSun Country Air
24h 13mPHL-IAD
$184
4/18Thu
2 stops
12h 17mPHL-IAD
$187
4/26Fri
1 stopAmerican Airlines
14h 26mPHL-IAD
$191
7/6Sat
nonstopUnited Airlines
1h 09mPHL-IAD
$195
4/18Thu
1 stopUnited Airlines
5h 48mPHL-IAD
$204
6/20Thu
1 stop
26h 35mPHL-IAD
$206
7/6Sat
1 stopAmerican Airlines
7h 57mPHL-IAD
$290

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Last minute flights from Philadelphia to Dulles Intl

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Philadelphia to Washington, D.C. that are departing in the next 10 days.
3/29Fri
multi-stopUnited Airlines
3h 40mPHL-IAD
4/2Tue
multi-stopUnited Airlines
5h 50mIAD-PHL
$308
3/29Fri
multi-stopUnited Airlines
3h 40mPHL-IAD
4/2Tue
multi-stopUnited Airlines
18h 36mIAD-PHL
$435
3/29Fri
multi-stopUnited Airlines
3h 40mPHL-IAD
4/3Wed
multi-stopUnited Airlines
10h 49mIAD-PHL
$495
3/29Fri
multi-stopUnited Airlines
3h 40mPHL-IAD
4/5Fri
multi-stopUnited Airlines
5h 50mIAD-PHL
$497
4/2Tue
multi-stopUnited Airlines
13h 59mPHL-IAD
4/9Tue
multi-stopUnited Airlines
5h 50mIAD-PHL
$521
3/29Fri
multi-stopUnited Airlines
5h 54mPHL-IAD
3/31Sun
multi-stopUnited Airlines
6h 19mIAD-PHL
$533
3/31Sun
multi-stop
8h 18mPHL-IAD
4/2Tue
multi-stop
31h 38mIAD-PHL
$536
3/31Sun
multi-stop
8h 18mPHL-IAD
4/5Fri
multi-stop
19h 35mIAD-PHL
$542
3/31Sun
multi-stopAmerican Airlines
6h 11mPHL-IAD
4/4Thu
multi-stopAmerican Airlines
4h 45mIAD-PHL
$779
3/31Sun
multi-stopAmerican Airlines
4h 37mPHL-IAD
3/31Sun
multi-stopAmerican Airlines
3h 50mIAD-PHL
$835

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Philadelphia - Washington Dulles Airport Flights

Departure:

Philadelphia (PHL)United States

Destination:

Washington Dulles Airport (IAD)United States

Return flight deals:

Washington Dulles Airport - Philadelphia

Cabin classes:

$666
$1,647
$996
$388