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Dulles Intl

$48+ Cheap flights from Pennsylvania to Dulles Intl (IAD)

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — IAD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Pennsylvania to Dulles Intl

Keep the following information in mind while searching for Pennsylvania to Dulles Intl flight deals. Data was last updated September 15, 2025.

Round-trip from

$117
(United Airlines)

One-way from

$48
(Trip.com)

Popular in

December

Cheapest in

November

Average price

$299

Good round-trip deal

$112 or less

Good one-way deal

$203 or less
From Pennsylvania to Washington, D.C. Dulles Intl
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One-way flight from Pennsylvania to Washington, D.C. Dulles Intl
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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Pennsylvania to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Pennsylvania to Washington, D.C. Dulles Intl.
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Find flight deals from Pennsylvania to Dulles Intl

Cheapest flights from Pennsylvania to Dulles Intl
Explore the most affordable flight options available from Pennsylvania to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:00 amLGA - IAD
Nonstop1h 32mUnited Airlines
Tue 10/218:21 amIAD - LGA
Nonstop1h 22mUnited Airlines
Deal found 9/15$117
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:55 pmEWR - IAD
Nonstop1h 29mUnited Airlines
Mon 9/296:15 amIAD - EWR
Nonstop1h 14mUnited Airlines
Deal found 9/13$117
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:29 pmLGA - IAD
Nonstop1h 32mUnited Airlines
Mon 9/2910:20 pmIAD - LGA
Nonstop1h 23mUnited Airlines
Deal found 9/13$126
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2810:41 pmEWR - IAD
Nonstop1h 18mUnited Airlines
Thu 10/26:15 amIAD - EWR
Nonstop1h 14mUnited Airlines
Deal found 9/13$127
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:00 amLGA - IAD
Nonstop1h 32mUnited Airlines
Mon 10/2010:20 pmIAD - LGA
Nonstop1h 23mUnited Airlines
Deal found 9/13$129
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/106:00 amEWR - IAD
Nonstop1h 20mUnited Airlines
Mon 10/136:15 amIAD - EWR
Nonstop1h 14mUnited Airlines
Deal found 9/15$129
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/910:24 amLGA - IAD
Nonstop1h 30mUnited Airlines
Sat 10/1110:21 pmIAD - LGA
Nonstop1h 23mUnited Airlines
Deal found 9/13$133
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:48 pmEWR - IAD
Nonstop1h 17mUnited Airlines
Sun 10/56:15 amIAD - EWR
Nonstop1h 14mUnited Airlines
Deal found 9/14$133
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:29 pmLGA - IAD
Nonstop1h 32mUnited Airlines
Sat 10/48:21 amIAD - LGA
Nonstop1h 22mUnited Airlines
Deal found 9/14$137
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2810:41 pmEWR - IAD
Nonstop1h 18mUnited Airlines
Tue 9/306:15 amIAD - EWR
Nonstop1h 14mUnited Airlines
Deal found 9/14$137
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:40 pmJFK - IAD
Nonstop1h 38mDelta
Thu 11/612:09 pmIAD - JFK
Nonstop1h 20mDelta
Deal found 9/15$137
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/315:40 pmJFK - IAD
Nonstop1h 38mDelta
Mon 11/312:09 pmIAD - JFK
Nonstop1h 20mDelta
Deal found 9/14$138

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pennsylvania to Dulles Intl 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Pennsylvania to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Pennsylvania

Fly to

Dulles Intl

Route

Depart

Return

Price

New YorkWashington, D.C.

LGA - IAD

LGAIAD

New York LaGuardia

Sat 9/27

7:29 pm-9:01 pm

Nonstop1h 32m

Washington, D.C. Dulles Intl

Mon 9/29

10:20 pm-11:43 pm

Nonstop1h 23m

$126

NewarkWashington, D.C.

EWR - IAD

EWRIAD

Newark

Fri 12/12

7:48 pm-9:21 pm

Nonstop1h 33m

Washington, D.C. Dulles Intl

Sat 12/13

10:35 pm-11:57 pm

Nonstop1h 22m

$129

NewarkWashington, D.C.

EWR - IAD

EWRIAD

Newark

Tue 10/14

7:42 pm-9:11 pm

Nonstop1h 29m

Washington, D.C. Dulles Intl

Tue 10/21

8:30 am-9:50 am

Nonstop1h 20m

$129

NewarkWashington, D.C.

EWR - IAD

EWRIAD

Newark

Fri 10/17

6:00 am-7:20 am

Nonstop1h 20m

Washington, D.C. Dulles Intl

Sun 10/19

6:15 am-7:27 am

Nonstop1h 12m

$129

NewarkWashington, D.C.

EWR - IAD

EWRIAD

Newark

Thu 11/6

9:34 pm-10:58 pm

Nonstop1h 24m

Washington, D.C. Dulles Intl

Sun 11/9

6:00 am-7:13 am

Nonstop1h 13m

$129

NewarkWashington, D.C.

EWR - IAD

EWRIAD

Newark

Sat 10/18

3:00 pm-4:26 pm

Nonstop1h 26m

Washington, D.C. Dulles Intl

Mon 10/20

10:35 pm-11:59 pm

Nonstop1h 24m

$129

NewarkWashington, D.C.

EWR - IAD

EWRIAD

Newark

Thu 10/9

2:48 pm-4:05 pm

Nonstop1h 17m

Washington, D.C. Dulles Intl

Thu 10/9

10:35 pm-11:59 pm

Nonstop1h 24m

$129

NewarkWashington, D.C.

EWR - IAD

EWRIAD

Newark

Sat 10/11

6:00 am-7:20 am

Nonstop1h 20m

Washington, D.C. Dulles Intl

Sat 10/11

5:12 pm-6:33 pm

Nonstop1h 21m

$129

New YorkWashington, D.C.

JFK - IAD

JFKIAD

New York John F Kennedy Intl

Thu 10/30

5:40 pm-7:18 pm

Nonstop1h 38m

Washington, D.C. Dulles Intl

Thu 11/6

7:59 pm-9:29 pm

Nonstop1h 30m

$137

New YorkWashington, D.C.

JFK - IAD

JFKIAD

New York John F Kennedy Intl

Thu 10/23

10:30 am-11:57 am

Nonstop1h 27m

Washington, D.C. Dulles Intl

Mon 10/27

7:59 pm-9:29 pm

Nonstop1h 30m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
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Best time to book a flight from Pennsylvania to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Pennsylvania 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 Pennsylvania to Washington, D.C. Dulles Intl Airport

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

Currently, August is the cheapest month in which you can book a flight from Pennsylvania to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Pennsylvania to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 PA to IAD?

Find hourly flight availability from Pennsylvania to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from Pennsylvania to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Explore weekly flight availability from Pennsylvania to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 15, 2025.

The most flights from USPA to IAD are scheduled on a Friday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 on average).

Related info for your journey

Find useful and relevant information for your journey from Pennsylvania to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Pennsylvania to Washington, D.C. Dulles Intl Airport?

    Departing from Pennsylvania to Washington, D.C. Dulles Intl Airport will take you 1h 32m. Pennsylvania and Washington, D.C. Dulles Intl Airport are separated by a distance of 228 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Pennsylvania to Washington, D.C. Dulles Intl Airport one-way?

    One-way options have recently been found by users for as low as $59 on Southern / Mokulele. Other airlines that offer cheap prices include United Airlines from $65 and Delta from $69 one-way.

  • What are the most popular routes from Pennsylvania to Washington, D.C. Dulles Intl Airport?

    Most travelers choose New York John F Kennedy Intl - Washington, D.C. Dulles Intl, New York LaGuardia - Washington, D.C. Dulles Intl or Newark - Washington, D.C. Dulles Intl when deciding on the best route from Pennsylvania to Washington, D.C. Dulles Intl Airport.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Pennsylvania to Washington, D.C. Dulles Intl Airport on time: Mesa Airlines (100%), Air Canada (93%), ANA (89%).

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

    While on average a flight from Pennsylvania to Washington, D.C. Dulles Intl Airport is generally $1,010, our data shows the cheapest flight currently is $203. When looking at the most popular route, (New York John F Kennedy Intl - Washington, D.C. Dulles Intl), you can expect to pay $137 for that flight.

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

    Yes. In addition to deals on Pennsylvania to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pennsylvania to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pennsylvania to Dulles Intl.

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

    Yes. Cheapflights offers flight deals from Pennsylvania to Dulles Intl 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 Pennsylvania to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Pennsylvania to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Pennsylvania to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
National Harbor
Dundalk

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Alternative routes for Pennsylvania to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Dulles Intl flights
Boston to Baltimore flights
Dallas/Fort Worth to Baltimore flights
Los Angeles to Reagan-National flights
Boston to Reagan-National flights
Los Angeles to Dulles Intl flights
Seattle to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Boston to Dulles Intl flights
O'Hare Intl to Reagan-National flights
Atlanta to Dulles Intl flights
Seattle to Reagan-National flights
Seattle to Baltimore flights
San Francisco to Reagan-National flights
Hobby to Reagan-National flights
O'Hare Intl to Dulles Intl flights
San Francisco to Baltimore flights
Hobby to Dulles Intl flights
San Francisco to Dulles Intl flights
Los Angeles to Baltimore flights
Minneapolis to Dulles Intl flights
O'Hare Intl to Baltimore flights
Atlanta to Reagan-National flights
Detroit to Dulles Intl flights
Minneapolis to Reagan-National flights
Hobby to Baltimore flights
Atlanta to Baltimore flights
Orlando to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
Tampa to Dulles Intl flights
Austin to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
Tampa to Reagan-National flights
Midway to Baltimore flights
Detroit to Reagan-National flights
Midway to Dulles Intl flights
Orlando to Reagan-National flights
San Diego to Dulles Intl flights
Denver to Baltimore flights
Orlando to Baltimore flights
Sky Harbor Intl to Dulles Intl flights
Miami to Reagan-National flights
Fort Lauderdale to Baltimore flights
Denver to Dulles Intl flights
Salt Lake City to Dulles Intl flights
Tampa to Baltimore flights
Ontario to Dulles Intl flights
George Bush Intcntl to Baltimore flights
San Diego to Reagan-National flights

Top 2 airlines flying from Pennsylvania to Dulles Intl

Discover the top 2 airlines that operate flights from Pennsylvania to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Southern / MokuleleCheapest$94Average$152FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$179Average$294FlexibilityNo cancel feeOn-time69%

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