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.

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).

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

Flights from Washington, D.C. Dulles Intl Airport to Delaware lean towards being more expensive in August. Prices are generally better when you fly from Washington, D.C. Dulles Intl Airport to Delaware in April, with the cheapest ticket starting at $179.

What is the cheapest time of day to fly from IAD to DE?

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

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.

$109+ Flights from Washington, D.C. Dulles Intl Airport to Delaware

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Cheap flight deals from Dulles Intl to Delaware

Round-trip from	$179 (United Airlines)
One-way from	$109 (Mytrip)
Popular in	August
Cheapest in	April
Average price	$819

From Washington, D.C. Dulles Intl to Delaware

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One-way flight from Washington, D.C. Dulles Intl to Delaware

Search Deals

Highest demand for flights based on searches. 23% potential increase in price ($109 potential increase over avg. RT price).

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Cheapest flight prices on average. 15% potential price decrease ($47 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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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 August 1, 2025.

Fri 9/512:52 pmIAD - PHL

Nonstop1h 14mUnited Airlines

Mon 9/87:58 pmPHL - IAD

Nonstop1h 07mUnited Airlines

Deal found 7/31

$179

Thu 8/1411:04 amIAD - PHL

2 stops22h 52mMultiple Airlines

Sat 8/162:06 pmPHL - IAD

2 stops20h 08mMultiple Airlines

Deal found 7/31

$222

Thu 8/286:34 amIAD - PHL

1 stop4h 10mAmerican Airlines

Sun 8/318:30 amPHL - IAD

1 stop4h 18mAmerican Airlines

Deal found 8/1

$287

Sat 8/161:18 pmIAD - SBY

1 stop7h 13mAmerican Airlines

Wed 8/206:00 amSBY - IAD

1 stop3h 53mAmerican Airlines

Deal found 8/1

$460

Best flights from Dulles Intl to Delaware
Discover carefully curated flight deals from Dulles Intl to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 1, 2025.

Fri 9/512:52 pmIAD - PHL

Nonstop1h 14mUnited Airlines

Mon 9/87:58 pmPHL - IAD

Nonstop1h 07mUnited Airlines

Deal found 7/31

$179

Thu 8/1411:04 amIAD - PHL

2 stops22h 52mMultiple Airlines

Sat 8/162:06 pmPHL - IAD

2 stops20h 08mMultiple Airlines

Deal found 7/31

$222

Thu 8/286:34 amIAD - PHL

1 stop4h 10mAmerican Airlines

Sun 8/318:30 amPHL - IAD

1 stop4h 18mAmerican Airlines

Deal found 8/1

$287

Sat 8/161:18 pmIAD - SBY

1 stop7h 13mAmerican Airlines

Wed 8/206:00 amSBY - IAD

1 stop3h 53mAmerican Airlines

Deal found 8/1

$460

Last-minute flights from Dulles Intl to Delaware
Discover last-minute flight deals from Dulles Intl to Delaware. Data last updated August 1, 2025 and is based on user searches.

Thu 8/78:45 amIAD - PHL

Nonstop1h 10mUnited Airlines

Sun 8/106:05 amPHL - IAD

Nonstop1h 10mUnited Airlines

Deal found 7/31

$199

Thu 8/79:14 amIAD - PHL

1 stop5h 32mAmerican Airlines

Sat 8/95:35 pmPHL - IAD

1 stop6h 22mAmerican Airlines

Deal found 7/29

$289

Thu 8/711:58 amIAD - PHL

2 stops20h 06mMultiple Airlines

Sat 8/95:21 pmPHL - IAD

2 stops17h 47mMultiple Airlines

Deal found 7/29

$361

Thu 8/145:30 pmIAD - PHL

Nonstop1h 18mUnited Airlines

Mon 8/187:59 pmPHL - IAD

Nonstop1h 09mUnited Airlines

Deal found 7/30

$189

Thu 8/1411:04 amIAD - PHL

2 stops22h 52mMultiple Airlines

Sat 8/162:06 pmPHL - IAD

2 stops20h 08mMultiple Airlines

Deal found 7/31

$222

Sat 8/161:18 pmIAD - SBY

1 stop7h 13mAmerican Airlines

Wed 8/206:00 amSBY - IAD

1 stop3h 53mAmerican Airlines

Deal found 8/1

$460

Thu 8/286:34 amIAD - PHL

1 stop4h 10mAmerican Airlines

Sun 8/318:30 amPHL - IAD

1 stop4h 18mAmerican Airlines

Deal found 8/1

$287

One-way flights from Dulles Intl to Delaware
Search for one-way flight options from Dulles Intl to Delaware. Find affordable one-way fares based on user searches. Data last updated August 1, 2025.

Thu 8/1411:04 amIAD - PHL

2 stops22h 52mMultiple Airlines

Deal found 7/31

$109

Thu 8/2112:52 pmIAD - PHL

Nonstop1h 14mUnited Airlines

Deal found 7/30

$204

Tue 10/2810:25 amIAD - PHL

1 stop4h 16mAmerican Airlines

Deal found 8/1

$214

Thu 8/288:19 pmIAD - SBY

1 stop38h 23mAmerican Airlines

Deal found 7/31

$365

Cheapflights Fare Finder

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

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Fri 9/5

12:52 pm-2:06 pm

Nonstop1h 14m

Philadelphia

Mon 9/8

7:58 pm-9:05 pm

Nonstop1h 07m

$179

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 8/14

11:04 am-9:56 am

2 stops22h 52m

Philadelphia

Sat 8/16

2:06 pm-10:14 am

2 stops20h 08m

$222

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 8/28

6:34 am-10:44 am

1 stop4h 10m

Philadelphia

Sun 8/31

8:30 am-12:48 pm

1 stop4h 18m

$287

Washington, D.C.Salisbury

IAD - SBY

IADSBY

Washington, D.C. Dulles Intl

Sat 8/16

1:18 pm-8:31 pm

1 stop7h 13m

Salisbury-Ocean City

Wed 8/20

6:00 am-9:53 am

1 stop3h 53m

$460

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 8/14

11:04 am-9:56 am

2 stops22h 52m

$109

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Thu 8/21

12:52 pm-2:06 pm

Nonstop1h 14m

$204

Washington, D.C.Philadelphia

IAD - PHL

IADPHL

Washington, D.C. Dulles Intl

Tue 10/28

10:25 am-2:41 pm

1 stop4h 16m

$214

Washington, D.C.Salisbury

IAD - SBY

IADSBY

Washington, D.C. Dulles Intl

Thu 8/28

8:19 pm-10:42 am

1 stop38h 23m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

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.

Reviews of airlines servicing Delaware

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Delaware, such as United Airlines and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,904 reviews

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

8,904 reviews

United Airlines

7.4

Good

8,904 reviews

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

8,904 reviews

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

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

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Baltimore to Midway flights

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$109+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Delaware with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 August 1, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Dulles Intl to Delaware

Cheapest flights from Dulles Intl to DelawareExplore 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 August 1, 2025.

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 August 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Delaware that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Delaware

Reviews of airlines servicing Delaware

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Delaware, such as United Airlines and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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.

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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 August 1, 2025.