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IAD - PHL

Find cheap flights from Washington Dulles Airport to Philadelphia from $89

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Philadelphia departing on 4/8. 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
Thu 4/18
Thu 4/25

Search hundreds of travel sites at once for deals on flights to Philadelphia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Philadelphia, 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 Washington, D.C. to Philadelphia, as well as popular online travel agencies
In the last 7 days travelers have searched 47,600,107 times on KAYAK, and here is why:

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Dulles Intl to Philadelphia

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Philadelphia 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.
5:29 pm - 10:48 pmIAD-PHL
5h 19m1 stop
5:49 pm - 11:18 pmPHL-IAD
5h 29m1 stop
$236United Airlines
Find Deal
Thu, May 16 - Mon, May 20
5:29 pm - 11:19 pmIAD-PHL
5h 50m1 stop
5:30 pm - 11:18 pmPHL-IAD
5h 48m1 stop
$237United Airlines
Find Deal
Tue, Apr 16 - Tue, Apr 23
5:29 pm - 11:19 pmIAD-PHL
5h 50m1 stop
5:30 pm - 11:18 pmPHL-IAD
5h 48m1 stop
$238United Airlines
Find Deal
Mon, Apr 15 - Mon, Apr 22
5:40 pm - 10:46 pmIAD-PHL
5h 06m1 stop
5:18 pm - 8:42 pmPHL-IAD
3h 24m1 stop
$253United Airlines
Find Deal
Tue, Mar 26 - Tue, Apr 2
5:20 pm - 8:35 amIAD-PHL
15h 15m3 stops
7:00 am - 6:07 pmPHL-IAD
11h 07m1 stop
Mon, Apr 8 - Mon, Apr 15
6:00 am - 2:30 pmIAD-PHL
8h 30m1 stop
6:00 am - 10:52 pmPHL-IAD
16h 52m1 stop
$330Delta
Find Deal
Tue, May 7 - Sat, May 11
7:53 pm - 9:19 amIAD-PHL
13h 26m1 stop
7:28 pm - 9:16 amPHL-IAD
13h 48m1 stop
$334Delta
Find Deal
Mon, Apr 8 - Mon, Apr 15
2:12 pm - 6:54 pmIAD-PHL
4h 42m1 stop
6:35 am - 11:24 amPHL-IAD
4h 49m1 stop
$365American Airlines
Find Deal
Tue, Apr 23 - Wed, Apr 24
9:58 pm - 7:37 amIAD-PHL
33h 39m3 stops
6:50 am - 4:43 pmPHL-IAD
9h 53m2 stops
Sun, Apr 14 - Sun, Apr 21
5:04 am - 9:21 amIAD-PHL
4h 17m1 stop
6:35 am - 11:24 amPHL-IAD
4h 49m1 stop
$470American Airlines
Find Deal
Tue, Apr 9 - Sun, Apr 14

Flights from Dulles Intl to Philadelphia - Travel Insights & Trends

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport to Philadelphia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Philadelphia is April, where tickets cost $109 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $574 and $488 respectively.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on Sun Country Air ($189) and United Airlines ($204). The cheapest round-trip tickets were found on United Airlines ($236) and Delta ($330).

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

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is 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 Washington Dulles Airport to Philadelphia take?

Flying between Philadelphia and Washington Dulles Airport will take minimum 3h 57m and will require at least one stop.

Good to know

Low season

August

High season

November

Cheapest flight

$89
Best time to beat the crowds with an average 82% drop in price.
Most popular time to fly and prices are also 58% lower on average.
Flight from Washington Dulles Airport to Philadelphia

When to book flights from Dulles Intl to Philadelphia

Are your dates flexible? Find out the best times to travel from Dulles Intl to Philadelphia 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 Washington Dulles Airport to Philadelphia flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Philadelphia was $89 for a one-way ticket and $236 for a round-trip.

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

    No, a passport isn't needed to fly from Washington Dulles Airport to Philadelphia. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Washington Dulles Airport to Philadelphia?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Philadelphia, also known as Philadelphia.

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

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

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

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Washington Dulles Airport to Philadelphia flight route.

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

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

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

    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 Washington Dulles Airport to Philadelphia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Washington Dulles Airport 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 Washington Dulles Airport to Philadelphia?

    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 Philadelphia with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and PHL 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 Washington Dulles Airport to Philadelphia?

    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 Philadelphia from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

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

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Philadelphia found on KAYAK in the last 72 hours.
4/8Mon
1 stop
16h 50mIAD-PHL
$89
4/12Fri
1 stop
5h 59mIAD-PHL
$106
6/12Wed
1 stopSun Country Air
23h 47mIAD-PHL
$189
4/11Thu
1 stopUnited Airlines
5h 50mIAD-PHL
$204
4/19Fri
2 stopsUnited Airlines
15h 04mIAD-PHL
$222
3/29Fri
1 stopSun Country Air
20h 13mIAD-PHL
$249
4/8Mon
2 stopsDelta
18h 34mIAD-PHL
$291
4/13Sat
1 stopDelta
9h 26mIAD-PHL
$296
8/15Thu
1 stopAmerican Airlines
5h 44mIAD-PHL
$306
4/14Sun
1 stopAmerican Airlines
4h 17mIAD-PHL
$307

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Last minute flights from Dulles Intl to Philadelphia

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 Washington, D.C. to Philadelphia that are departing in the next 10 days.
3/23Sat
multi-stopUnited Airlines
14h 16mIAD-PHL
3/25Mon
multi-stopUnited Airlines
5h 54mPHL-IAD
$606
3/23Sat
multi-stopUnited Airlines
5h 06mIAD-PHL
3/25Mon
multi-stopUnited Airlines
3h 40mPHL-IAD
$699
3/22Fri
multi-stopUnited Airlines
14h 16mIAD-PHL
3/23Sat
multi-stopUnited Airlines
3h 40mPHL-IAD
$785
3/22Fri
multi-stopUnited Airlines
5h 06mIAD-PHL
3/23Sat
multi-stopUnited Airlines
4h 35mPHL-IAD
$845
3/22Fri
multi-stopUnited Airlines
14h 16mIAD-PHL
3/23Sat
multi-stopUnited Airlines
13h 43mPHL-IAD
$954

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Washington Dulles Airport - Philadelphia Flights

Departure:

Washington Dulles Airport (IAD)United States

Destination:

Philadelphia (PHL)United States

Return flight deals:

Philadelphia - Washington Dulles Airport

Cabin classes:

$430