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Dulles Intl

$49+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — IAD
Mar 17 — Mar 241
Tue 3/17
Tue 3/24
1 adult, Economy
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Cheap 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 February 15, 2026.

This United Airlines deal was found by Cheapflights users on 2/14. 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.
Tue 3/177:57 pm
PIT
-
IAD
Nonstop1h 07m
United Airlines
Wed 3/1812:50 pm
IAD
-
PIT
Nonstop1h 07m
United Airlines
Deal found 2/14$97
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/511:03 am
JFK
-
IAD
1 stop20h 21m
Frontier
Mon 3/98:09 am
IAD
-
JFK
1 stop28h 07m
Frontier
Deal found 2/12$124
This Kiwi.com deal was found by Cheapflights users on 2/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/175:30 pm
LGA
-
IAD
1 stop6h 26m
Frontier
Tue 3/247:00 am
IAD
-
LGA
1 stop9h 29m
Frontier
Deal found 2/15$128
This Kiwi.com deal was found by Cheapflights users on 2/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:00 am
EWR
-
IAD
1 stop17h 56m
Frontier
Tue 3/247:00 am
IAD
-
EWR
1 stop18h 03m
Frontier
Deal found 2/15$128
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1710:00 am
JFK
-
IAD
1 stop13h 56m
Frontier
Tue 3/247:00 am
IAD
-
JFK
1 stop18h 13m
Frontier
Deal found 2/13$128
This eDestinos deal was found by Cheapflights users on 2/11. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2511:30 am
JFK
-
IAD
1 stop13h 06m
Frontier
Sun 4/266:20 am
IAD
-
JFK
1 stop28h 09m
Frontier
Deal found 2/11$129
This Trip.com deal was found by Cheapflights users on 2/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/57:40 am
PIT
-
IAD
1 stop3h 43m
Southern / Mokulele
Mon 3/95:40 pm
IAD
-
PIT
1 stop3h 49m
Southern / Mokulele
Deal found 2/11$130
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/511:03 am
JFK
-
IAD
1 stop20h 21m
Multiple Airlines
Mon 3/92:58 pm
IAD
-
JFK
2 stops21h 18m
Multiple Airlines
Deal found 2/12$130
This Trip.com deal was found by Cheapflights users on 2/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/237:40 am
PIT
-
IAD
1 stop3h 43m
Southern / Mokulele
Fri 3/135:40 pm
IAD
-
PIT
1 stop3h 49m
Southern / Mokulele
Deal found 2/13$131
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/712:29 pm
LGA
-
IAD
1 stop12h 02m
Frontier
Wed 3/116:20 am
IAD
-
LGA
1 stop10h 09m
Frontier
Deal found 2/12$134
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Tue 3/176:10 am
PIT
-
IAD
Nonstop1h 15m
United Airlines
Thu 3/268:25 am
IAD
-
PIT
Nonstop1h 10m
United Airlines
Deal found 2/13$134
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:59 am
EWR
-
IAD
1 stop18h 37m
Frontier
Thu 4/239:51 am
IAD
-
EWR
1 stop15h 25m
Frontier
Deal found 2/13$134

Find 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 February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$97
(United Airlines)

One-way from

$49
(United Airlines)

Popular in

February

Cheapest in

November

Average price

$455

Good round-trip deal

$299 or less

Good one-way deal

$65 or less
Provider with most accurate pricing for Philadelphia-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Washington, D.C. (WAS) flights.
Search Deals
From Pennsylvania to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Pennsylvania to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Pennsylvania to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Pennsylvania to Washington, D.C. Dulles Intl.
Search Deals

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 February 15, 2026.
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

PittsburghWashington, D.C.

PIT - IAD

PITIAD

Pittsburgh

Tue 3/17

7:57 pm-9:04 pm

Nonstop1h 07m

Washington, D.C. Dulles Intl

Wed 3/18

12:50 pm-1:57 pm

Nonstop1h 07m

$97

PittsburghWashington, D.C.

PIT - IAD

PITIAD

Pittsburgh

Wed 3/18

7:40 am-11:26 am

1 stop3h 46m

Washington, D.C. Dulles Intl

Sun 3/29

5:40 pm-9:29 pm

1 stop3h 49m

$131

New YorkWashington, D.C.

LGA - IAD

LGAIAD

New York LaGuardia

Sat 3/7

12:29 pm-12:31 am

1 stop12h 02m

Washington, D.C. Dulles Intl

Wed 3/11

6:20 am-4:29 pm

1 stop10h 09m

$134

PittsburghWashington, D.C.

PIT - IAD

PITIAD

Pittsburgh

Wed 3/11

10:30 am-11:45 am

Nonstop1h 15m

Washington, D.C. Dulles Intl

Thu 3/12

8:25 am-9:35 am

Nonstop1h 10m

$134

PittsburghWashington, D.C.

PIT - IAD

PITIAD

Pittsburgh

Tue 3/17

7:57 pm-9:04 pm

Nonstop1h 07m

Washington, D.C. Dulles Intl

Thu 3/26

12:50 pm-1:57 pm

Nonstop1h 07m

$134

PittsburghWashington, D.C.

PIT - IAD

PITIAD

Pittsburgh

Tue 3/31

10:30 am-11:36 am

Nonstop1h 06m

Washington, D.C. Dulles Intl

Thu 4/2

8:33 am-9:34 am

Nonstop1h 01m

$134

PittsburghWashington, D.C.

PIT - IAD

PITIAD

Pittsburgh

Wed 3/18

6:10 am-7:25 am

Nonstop1h 15m

Washington, D.C. Dulles Intl

Sun 3/29

8:30 am-9:31 am

Nonstop1h 01m

$138

New YorkWashington, D.C.

JFK - IAD

JFKIAD

New York John F Kennedy Intl

Tue 3/17

5:47 pm-7:19 pm

Nonstop1h 32m

Washington, D.C. Dulles Intl

Fri 3/20

7:59 pm-9:29 pm

Nonstop1h 30m

$139

New YorkWashington, D.C.

JFK - IAD

JFKIAD

New York John F Kennedy Intl

Wed 3/18

11:18 am-12:39 pm

Nonstop1h 21m

Washington, D.C. Dulles Intl

Wed 3/18

7:59 pm-9:29 pm

Nonstop1h 30m

$139

New YorkWashington, D.C.

JFK - IAD

JFKIAD

New York John F Kennedy Intl

Tue 3/31

11:18 am-12:39 pm

Nonstop1h 21m

Washington, D.C. Dulles Intl

Tue 4/7

1:19 pm-2:40 pm

Nonstop1h 21m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

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, January is the cheapest month in which you can book a flight from Pennsylvania to Washington, D.C. Dulles Intl Airport (average of $87). Flying from Pennsylvania to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $136). 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 February 15, 2026.

A simple way to save on the total cost of your ticket is to fly from Pennsylvania to Washington, D.C. Dulles Intl Airport in the morning. If you’re flexible enough to do this you can expect to save up to 44% on your trip compared to booking a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Pennsylvania to Dulles Intl. Price data was last updated on February 7, 2026.

Travelers seeking maximum savings on their Pennsylvania to Washington, D.C. Dulles Intl Airport flight should consider departing on Sunday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 February 15, 2026.

The most flights from USPA to IAD are scheduled on a Friday (11 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 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 07m. Pennsylvania and Washington, D.C. Dulles Intl Airport are separated by a distance of 183 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Most travelers choose Newark - Washington, D.C. Dulles Intl, New York LaGuardia - Washington, D.C. Dulles Intl or New York John F Kennedy Intl - 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: Ethiopian Air (80%), ANA (78%), Copa Airlines (74%).

  • 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 $803, our data shows the cheapest flight currently is $179. When looking at the most popular route, (Newark - Washington, D.C. Dulles Intl), you can expect to pay $171 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, January is the cheapest month in which you can book a flight from Pennsylvania to Washington, D.C. Dulles Intl Airport (average of $87). Flying from Pennsylvania to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $136). 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
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Laurel
Linthicum Heights
Rockville
Upper Marlboro
Manassas
Bowie
Largo
McLean
Clinton
Towson

Browse thousands of different options on Cheapflights for your next trip

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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
Atlanta to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Orlando to Dulles Intl flights
Boston to Reagan-National flights
Boston to Dulles Intl flights
Atlanta to Baltimore flights
Los Angeles to Baltimore flights
San Francisco to Reagan-National flights
Los Angeles to Dulles Intl flights
Atlanta to Reagan-National flights
O'Hare Intl to Baltimore flights
O'Hare Intl to Dulles Intl flights
Seattle to Reagan-National flights
Hobby to Dulles Intl flights
San Francisco to Dulles Intl flights
San Francisco to Baltimore flights
O'Hare Intl to Reagan-National flights
Fort Lauderdale to Dulles Intl flights
Hobby to Reagan-National flights
Denver to Baltimore flights
Denver to Dulles Intl flights
Seattle to Dulles Intl flights
Miami to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
Fort Lauderdale to Baltimore flights
Detroit to Dulles Intl flights
Denver to Reagan-National flights
George Bush Intcntl to Reagan-National flights
Orlando to Reagan-National flights
LaGuardia to Reagan-National flights
Seattle to Baltimore flights
Austin to Dulles Intl flights
Tampa to Baltimore flights
Newark to Dulles Intl flights
Charlotte to Dulles Intl flights
Charlotte to Baltimore flights
Orlando to Baltimore flights
Miami to Reagan-National flights
Detroit to Baltimore flights
Minneapolis to Dulles Intl flights
San Diego to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Hobby to Baltimore flights
Detroit to Reagan-National flights
Tampa to Reagan-National flights
Austin to Baltimore 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 February 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Southern / MokuleleCheapest$86Average$170FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$179Average$295FlexibilityNo cancel feeOn-time69%

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