HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Delaware

$90+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ILG
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Delaware with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$161
(United Airlines)

One-way from

$90
(United Airlines)

Popular in

August

Cheapest in

April

Average price

$179
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. 10% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find 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 April 17, 2025.

This United Airlines deal was found by Cheapflights users on 4/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/138:35 amIAD - PHL
Nonstop1h 10mUnited Airlines
Wed 5/1410:44 amPHL - IAD
Nonstop1h 06mUnited Airlines
Deal found 4/17$161
This American Airlines deal was found by Cheapflights users on 4/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/89:11 amIAD - PHL
1 stop5h 37mAmerican Airlines
Sat 5/1010:30 amPHL - IAD
1 stop6h 26mAmerican Airlines
Deal found 4/17$259
This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/169:42 pmIAD - PHL
2 stops24h 54mMultiple Airlines
Fri 5/234:00 pmPHL - IAD
1 stop22h 39mMultiple Airlines
Deal found 4/17$403
This American Airlines deal was found by Cheapflights users on 4/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/145:26 pmIAD - SBY
1 stop4h 36mAmerican Airlines
Wed 5/215:03 amSBY - IAD
1 stop3h 35mAmerican Airlines
Deal found 4/17$460

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 April 17, 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

Tue 5/13

8:35 am-9:45 am

Nonstop1h 10m

Philadelphia

Wed 5/14

10:44 am-11:50 am

Nonstop1h 06m

$161

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 5/8

9:11 am-2:48 pm

1 stop5h 37m

Philadelphia

Sat 5/10

10:30 am-4:56 pm

1 stop6h 26m

$259

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 5/16

9:42 pm-10:36 pm

2 stops24h 54m

Philadelphia

Fri 5/23

4:00 pm-2:39 pm

1 stop22h 39m

$403

Washington, D.C.Salisbury

IAD - SBY

IADSBY

Washington, D.C. Dulles Intl

Wed 5/14

5:26 pm-10:02 pm

1 stop4h 36m

Salisbury-Ocean City

Wed 5/21

5:03 am-8:38 am

1 stop3h 35m

$460

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 5/8

8:35 am-9:45 am

Nonstop1h 10m

$90

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 5/13

8:25 am-10:43 pm

3 stops38h 18m

$177

Washington, D.C.Salisbury

IAD - SBY

IADSBY

Washington, D.C. Dulles Intl

Tue 5/6

5:26 pm-10:02 pm

1 stop4h 36m

$381

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 5/13

5:02 am-1:59 pm

2 stops8h 57m

$436

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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

Rainfall in Delaware by month

Plan your trip to Delaware by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.

Temperature in Delaware by month

Plan your trip to Delaware by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Delaware. Reviews last updated April 17, 2025.
United Airlines
7.4
Good
8,667 reviews

Crew

8.1

Entertainment

7.0

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,667 reviews
United Airlines
7.4
Good
8,667 reviews

Crew

8.1

Entertainment

7.0

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,667 reviews

Crew

8.1

Entertainment

7.0

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

  • 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.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Delaware

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to Dallas/Fort Worth flights
Reagan-National to Los Angeles flights
Dulles Intl to Las Vegas flights
Dulles Intl to Dallas/Fort Worth flights
Baltimore to Miami flights
Dulles Intl to Los Angeles flights
Dulles Intl to Seattle flights
Reagan-National to Miami flights
Reagan-National to Seattle flights
Dulles Intl to San Francisco flights
Baltimore to Fort Lauderdale flights
Reagan-National to Las Vegas flights
Dulles Intl to Hobby flights
Dulles Intl to Miami flights
Baltimore to Las Vegas flights
Dulles Intl to O'Hare Intl flights
Baltimore to Seattle flights
Reagan-National to Dallas/Fort Worth flights
Reagan-National to Boston flights
Baltimore to Orlando flights
Baltimore to Los Angeles flights
Reagan-National to O'Hare Intl flights
Dulles Intl to Atlanta flights
Reagan-National to San Francisco flights
Baltimore to Hobby flights
Dulles Intl to Orlando flights
Baltimore to Denver flights
Dulles Intl to Tampa flights
Dulles Intl to Boston flights
Reagan-National to Orlando flights
Baltimore to Boston flights
Reagan-National to Atlanta flights
Baltimore to San Francisco flights
Baltimore to Atlanta flights
Dulles Intl to Denver flights
Baltimore to O'Hare Intl flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to George Bush Intcntl flights
Dulles Intl to Sky Harbor Intl flights
Dulles Intl to Midway flights
Dulles Intl to Austin flights
Reagan-National to Tampa flights
Dulles Intl to San Diego flights
Dulles Intl to New Orleans flights
Reagan-National to Denver flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Hobby flights
Baltimore to Tampa flights
Baltimore to Sky Harbor Intl flights
Reagan-National to Nashville flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.