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Delaware

$120+ Cheap flights from Dulles Intl (IAD) to Delaware

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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ILG
Jun 17 — Jun 241
Wed 6/17
Wed 6/24
1 adult, Economy
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Cheap flight deals from Dulles Intl to Delaware

Cheapest flights from Dulles Intl to Delaware
Explore the most affordable flight options available from Dulles Intl to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/24:01 pm
IAD
-
PHL
1 stop16h 58m
Multiple Airlines
Sun 6/76:26 pm
PHL
-
IAD
1 stop19h 50m
Multiple Airlines
Deal found 5/14$233
This Kiwi.com deal was found by Cheapflights users on 5/18. 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.
Wed 6/176:26 pm
IAD
-
PHL
1 stop30h 18m
Frontier
Wed 6/248:00 am
PHL
-
IAD
1 stop12h 02m
Frontier
Deal found 5/18$235
This United Airlines deal was found by Cheapflights users on 5/13. 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 6/410:34 pm
IAD
-
PHL
Nonstop1h 10m
United Airlines
Sun 6/76:10 am
PHL
-
IAD
Nonstop1h 09m
United Airlines
Deal found 5/13$239
This Kiwi.com deal was found by Cheapflights users on 5/17. 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.
Fri 5/297:27 pm
IAD
-
PHL
1 stop13h 27m
Multiple Airlines
Sun 5/316:26 pm
PHL
-
IAD
1 stop19h 52m
Multiple Airlines
Deal found 5/17$245
This Kiwi.com deal was found by Cheapflights users on 5/16. 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 7/911:17 am
IAD
-
PHL
2 stops13h 22m
Multiple Airlines
Sun 7/126:18 pm
PHL
-
IAD
1 stop20h 08m
Multiple Airlines
Deal found 5/16$249
This Kiwi.com deal was found by Cheapflights users on 5/15. 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.
Fri 6/58:47 pm
IAD
-
PHL
1 stop10h 25m
Multiple Airlines
Sun 6/76:26 pm
PHL
-
IAD
1 stop19h 50m
Multiple Airlines
Deal found 5/15$252
This United Airlines deal was found by Cheapflights users on 5/14. 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 6/25:35 pm
IAD
-
PHL
Nonstop1h 20m
United Airlines
Sun 6/76:10 am
PHL
-
IAD
Nonstop1h 09m
United Airlines
Deal found 5/14$254
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 6/1111:24 am
IAD
-
PHL
2 stops13h 20m
Multiple Airlines
Sun 6/146:26 pm
PHL
-
IAD
1 stop19h 50m
Multiple Airlines
Deal found 5/18$256
This American Airlines deal was found by Cheapflights users on 5/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:22 pm
IAD
-
PHL
1 stop3h 53m
American Airlines
Fri 6/191:52 pm
PHL
-
IAD
1 stop5h 41m
American Airlines
Deal found 5/16$259
This Kiwi.com deal was found by Cheapflights users on 5/15. 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.
Sat 6/276:00 pm
IAD
-
PHL
1 stop7h 17m
Multiple Airlines
Sun 6/286:45 pm
PHL
-
IAD
1 stop19h 31m
Multiple Airlines
Deal found 5/15$260
This Kiwi.com deal was found by Cheapflights users on 5/13. 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.
Wed 6/37:45 am
IAD
-
SBY
2 stops13h 17m
Multiple Airlines
Wed 6/109:42 pm
SBY
-
IAD
1 stop15h 11m
Multiple Airlines
Deal found 5/13$261
This United Airlines deal was found by Cheapflights users on 5/13. 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 5/2212:55 pm
IAD
-
PHL
Nonstop1h 15m
United Airlines
Fri 6/510:32 am
PHL
-
IAD
Nonstop1h 16m
United Airlines
Deal found 5/13$269

Find flight deals from Dulles Intl to Delaware

Keep the following information in mind while searching for Dulles Intl to Delaware flight deals. Data was last updated May 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$233
(Kiwi.com)

One-way from

$120
(Kiwi.com)

Popular in

March

Cheapest in

December

Average price

$398
Provider with most accurate pricing for Washington, D.C. (WAS)-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Philadelphia flights.
Search Deals
From Washington, D.C. Dulles Intl to Delaware
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Delaware
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($107 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Delaware 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 May 18, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Delaware that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 7/2

10:34 pm-11:44 pm

Nonstop1h 10m

Philadelphia

Tue 7/7

6:10 am-7:19 am

Nonstop1h 09m

$239

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Wed 6/10

8:35 am-9:45 am

Nonstop1h 10m

Philadelphia

Thu 6/18

7:45 pm-9:11 pm

Nonstop1h 26m

$239

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sat 6/6

10:34 pm-11:44 pm

Nonstop1h 10m

Philadelphia

Mon 6/8

10:32 am-11:48 am

Nonstop1h 16m

$254

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 6/4

10:34 pm-11:44 pm

Nonstop1h 10m

Philadelphia

Fri 6/19

10:32 am-11:48 am

Nonstop1h 16m

$254

Washington, D.C.Salisbury

IAD - SBY

IADSBY

Washington, D.C. Dulles Intl

Wed 6/3

7:45 am-9:02 pm

2 stops13h 17m

Salisbury-Ocean City

Wed 6/10

9:42 pm-12:53 pm

1 stop15h 11m

$261

Washington, D.C.Salisbury

IAD - SBY

IADSBY

Washington, D.C. Dulles Intl

Thu 5/28

7:27 pm-7:31 pm

1 stop24h 04m

Salisbury-Ocean City

Mon 6/1

8:11 pm-3:16 pm

1 stop19h 05m

$275

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 6/12

8:35 am-9:45 am

Nonstop1h 10m

Philadelphia

Thu 6/18

7:45 pm-9:11 pm

Nonstop1h 26m

$309

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 6/16

12:55 pm-2:09 pm

Nonstop1h 14m

Philadelphia

Mon 6/22

7:45 pm-9:11 pm

Nonstop1h 26m

$309

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Wed 6/10

5:35 pm-6:55 pm

Nonstop1h 20m

Philadelphia

Wed 6/17

10:32 am-11:48 am

Nonstop1h 16m

$309

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 6/2

10:34 pm-11:44 pm

Nonstop1h 10m

Philadelphia

Sat 6/6

6:10 am-7:19 am

Nonstop1h 09m

$324

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/16

Showing 1-10 of 36 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Delaware
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Delaware. 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 Washington, D.C. Dulles Intl Airport to Delaware?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Delaware in 1h 10m. Fly via United Airlines to get the fastest option. Washington, D.C. Dulles Intl Airport and Delaware are separated by a distance of 134 mi. Most flights are nonstop.

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

    $317 is the cheapest one-way deal found within the past few days, from Royal Jordanian. You may also be able to find cheap deals on SAUDIA and Etihad Airways, with prices starting from $361 and $371, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Dulles Intl to Delaware

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Seattle flights
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Reagan-National to O'Hare Intl flights
Baltimore to Denver flights
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Reagan-National to Miami flights
Baltimore to Atlanta flights
Dulles Intl to San Francisco flights
Reagan-National to Hobby flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to Hobby flights
Baltimore to Orlando flights
Reagan-National to San Francisco flights
Dulles Intl to Tampa flights
Baltimore to Fort Lauderdale flights
Baltimore to San Francisco flights
Reagan-National to Atlanta flights
Dulles Intl to Midway flights
Baltimore to George Bush Intcntl flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Orlando flights
Dulles Intl to San Diego flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to George Bush Intcntl flights
Dulles Intl to New Orleans flights
Baltimore to Tampa flights
Baltimore to Detroit flights
Reagan-National to Denver flights
Baltimore to Midway flights
Reagan-National to Tampa flights

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