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Delaware

$67+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ILG
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
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 December 23, 2025.

This United Airlines deal was found by Cheapflights users on 12/22. 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 12/308:40 amIAD - PHL
Nonstop1h 15mUnited Airlines
Fri 1/910:30 amPHL - IAD
Nonstop1h 17mUnited Airlines
Deal found 12/22$224
This American Airlines deal was found by Cheapflights users on 12/22. 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.
Mon 12/291:57 pmIAD - PHL
1 stop4h 11mAmerican Airlines
Mon 1/57:15 pmPHL - IAD
1 stop4h 49mAmerican Airlines
Deal found 12/22$259
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/2712:55 pmIAD - PHL
Nonstop1h 12mUnited Airlines
Sun 1/410:39 amPHL - IAD
Nonstop1h 16mUnited Airlines
Deal found 12/21$274
This United Airlines deal was found by Cheapflights users on 12/21. 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.
Wed 12/3112:55 pmIAD - PHL
Nonstop1h 12mUnited Airlines
Sat 1/107:45 pmPHL - IAD
Nonstop1h 18mUnited Airlines
Deal found 12/21$284
This United Airlines deal was found by Cheapflights users on 12/21. 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.
Mon 12/2210:20 pmIAD - PHL
Nonstop1h 10mUnited Airlines
Thu 1/12:50 pmPHL - IAD
Nonstop1h 15mUnited Airlines
Deal found 12/21$289
This Kiwi.com deal was found by Cheapflights users on 12/22. 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 12/309:58 pmIAD - PHL
1 stop26h 42mFrontier
Fri 1/97:20 pmPHL - IAD
1 stop13h 48mFrontier
Deal found 12/22$292
This Kiwi.com deal was found by Cheapflights users on 12/22. 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.
Mon 12/293:50 pmIAD - PHL
2 stops8h 06mMultiple Airlines
Mon 1/58:41 pmPHL - IAD
1 stop14h 47mMultiple Airlines
Deal found 12/22$335
This United Airlines deal was found by Cheapflights users on 12/22. 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 12/268:40 amIAD - PHL
Nonstop1h 15mUnited Airlines
Sun 12/2810:39 amPHL - IAD
Nonstop1h 16mUnited Airlines
Deal found 12/22$339
This Kiwi.com deal was found by Cheapflights users on 12/22. 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 12/309:58 pmIAD - PHL
1 stop26h 42mMultiple Airlines
Fri 1/95:30 amPHL - IAD
2 stops8h 48mMultiple Airlines
Deal found 12/22$342
This United Airlines deal was found by Cheapflights users on 12/22. 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.
Mon 12/2910:20 pmIAD - PHL
Nonstop1h 10mUnited Airlines
Mon 1/510:39 amPHL - IAD
Nonstop1h 16mUnited Airlines
Deal found 12/22$374
This American Airlines deal was found by Cheapflights users on 12/20. 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.
Sun 12/214:29 pmIAD - SBY
1 stop5h 44mAmerican Airlines
Sun 12/286:00 amSBY - IAD
1 stop7h 09mAmerican Airlines
Deal found 12/20$761

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 December 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$141
(Kiwi.com)

One-way from

$67
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$189
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. 15% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 23, 2025.
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

Dulles Intl

Fly to

Delaware

Route

Depart

Return

Price

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Mon 1/19

10:08 pm-12:42 am

1 stop26h 34m

Philadelphia

Mon 1/26

5:30 am-12:36 pm

1 stop7h 06m

$143

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Mon 2/2

5:33 pm-11:14 am

1 stop17h 41m

Philadelphia

Fri 2/6

8:00 am-10:44 am

2 stops26h 44m

$162

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sun 1/18

8:20 am-9:38 am

Nonstop1h 18m

Philadelphia

Sun 1/25

10:30 am-11:48 am

Nonstop1h 18m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 1/16

12:55 pm-2:10 pm

Nonstop1h 15m

Philadelphia

Mon 1/19

10:30 am-11:47 am

Nonstop1h 17m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Mon 1/5

9:58 pm-12:51 am

2 stops26h 53m

Philadelphia

Fri 1/9

8:43 pm-9:08 am

1 stop12h 25m

$191

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Sun 1/18

3:00 pm-12:34 am

1 stop9h 34m

Philadelphia

Sun 1/25

10:45 pm-12:36 pm

1 stop13h 51m

$201

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 1/2

8:40 am-9:55 am

Nonstop1h 15m

Philadelphia

Sat 1/10

7:45 pm-9:03 pm

Nonstop1h 18m

$224

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 1/2

5:31 pm-12:25 am

1 stop6h 54m

Philadelphia

Tue 1/6

5:05 am-11:28 am

1 stop6h 23m

$238

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 1/22

8:20 am-9:37 am

Nonstop1h 17m

Philadelphia

Mon 1/26

3:01 pm-4:18 pm

Nonstop1h 17m

$239

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Wed 1/14

8:20 am-9:37 am

Nonstop1h 17m

Philadelphia

Wed 1/21

7:45 pm-9:02 pm

Nonstop1h 17m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 24 results
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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 18m. Fly via Frontier or United Airlines to get the fastest option. Washington, D.C. Dulles Intl Airport and Delaware are separated by a distance of 134 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $316 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 $347 and $366, 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.
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