$353 Cheap Flights from Wilmington (ILG) to Washington (IAD)

View $353 flight on Thu, Oct 16, 2025Opens in a new window

Popular airlines from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Wilmington to Washington (ILG-IAD)

Prices were available within the past 7 days and start at $353 for one-way flights and $204 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct 22 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$204 Roundtrip, found 3 days ago
$204
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 22 from Wilmington to Washington, returning Wed, Oct 29, priced at $204 found 3 days ago
American Airlines
Wed, Oct 22 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$263 Roundtrip, found 3 days ago
$263
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 22 from Wilmington to Washington, returning Wed, Oct 29, priced at $263 found 3 days ago
American Airlines
Thu, Oct 23 - Tue, Oct 28
ILG
Wilmington
IAD
Washington
$268 Roundtrip, found 3 days ago
$268
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Oct 23 from Wilmington to Washington, returning Tue, Oct 28, priced at $268 found 3 days ago
American Airlines
Wed, Oct 22 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$323 Roundtrip, found 3 days ago
$323
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 22 from Wilmington to Washington, returning Wed, Oct 29, priced at $323 found 3 days ago
American Airlines
Wed, Oct 22 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$328 Roundtrip, found 3 days ago
$328
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 22 from Wilmington to Washington, returning Wed, Oct 29, priced at $328 found 3 days ago
American Airlines
Wed, Oct 22 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$358 Roundtrip, found 3 days ago
$358
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 22 from Wilmington to Washington, returning Wed, Oct 29, priced at $358 found 3 days ago
American Airlines
Thu, Oct 23 - Thu, Oct 30
ILG
Wilmington
IAD
Washington
$362 Roundtrip, found 3 days ago
$362
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Oct 23 from Wilmington to Washington, returning Thu, Oct 30, priced at $362 found 3 days ago
American Airlines
Wed, Oct 22 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$363 Roundtrip, found 3 days ago
$363
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 22 from Wilmington to Washington, returning Wed, Oct 29, priced at $363 found 3 days ago
American Airlines
Sat, Oct 25 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$372 Roundtrip, found 3 days ago
$372
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Oct 25 from Wilmington to Washington, returning Wed, Oct 29, priced at $372 found 3 days ago
American Airlines
Mon, Oct 20 - Wed, Oct 29
ILG
Wilmington
IAD
Washington
$375 Roundtrip, found 3 days ago
$375
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Oct 20 from Wilmington to Washington, returning Wed, Oct 29, priced at $375 found 3 days ago

Frequently asked questions

How much does a flight from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD) cost?
Snag a cheap one-way flight from $353 or cheap return flight from $204 from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD)?
October is the least expensive month to fly from ILG to IAD. Planning your trip for the off-season is often the key to scoring lower fares.
Which airlines fly direct from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD)?
You can't take a direct flight from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD). However, you can easily reach Washington without any layovers by departing from Philadelphia Intl. Airport (PHL).
What is the cheapest airline that flies from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest ILG to IAD flight.
How many flights per day from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD)?
You'll need to take a flight with a layover when traveling from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from ILG to IAD?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD)?
To avoid possible delays on the Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD) route, aim to fly before 3 PM. Later flights have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your ticket from ILG to IAD right before your trip is typically more expensive. However, if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book an ILG to IAD flight and hotel package?
Securing an ILG to IAD flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Choose from our wide range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Wilmington, DE (ILG-New Castle) to Washington Dulles Intl. Airport (IAD)?
In most instances, you can modify or cancel your ILG to IAD flight. However, there may be additional charges, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need more details, visit our Customer Service portal.

Travel information

Origin airport
New Castle
Destination airport
Washington Dulles Intl.
Roundtrip price
$203
Distance
110 mi

Book with confidence

Wilmington to Washington Flights

The cheapest times to fly from Wilmington to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Wilmington to Washington are during the month of October. You can find some of the cheapest flights from Wilmington to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Wilmington to Washington

Sunday is one of the best days to book for cheap flights from Wilmington to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Wilmington to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Wilmington to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $353 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Wilmington to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Wilmington to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Wilmington to Washington Flights

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*Available to One Key members.