$396 Cheap Flights from Washington (DCA) to Decatur (DEC)

View $396 flight on Tue, Dec 23, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Decatur, IL (DEC)

Cheap Flights from Washington to Decatur (DCA-DEC)

Prices were available within the past 7 days and start at $396 for one-way flights and $244 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$244 Roundtrip, found 4 days ago
$244
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $244 found 4 days ago
United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$257 Roundtrip, found 4 days ago
$257
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $257 found 4 days ago
United
Tue, Nov 18 - Sat, Dec 6
DCA
Washington
DEC
Decatur
$314 Roundtrip, found 4 days ago
$314
Roundtrip
found 4 days ago
Select United flight, departing Tue, Nov 18 from Washington to Decatur, returning Sat, Dec 6, priced at $314 found 4 days ago
United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$316 Roundtrip, found 4 days ago
$316
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $316 found 4 days ago
United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$324 Roundtrip, found 4 days ago
$324
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $324 found 4 days ago
United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$327 Roundtrip, found 4 days ago
$327
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $327 found 4 days ago
United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$337 Roundtrip, found 4 days ago
$337
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $337 found 4 days ago
United
Mon, Dec 29 - Thu, Jan 8
DCA
Washington
DEC
Decatur
$340 Roundtrip, found 6 days ago
$340
Roundtrip
found 6 days ago
Select United flight, departing Mon, Dec 29 from Washington to Decatur, returning Thu, Jan 8, priced at $340 found 6 days ago
United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$346 Roundtrip, found 4 days ago
$346
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $346 found 4 days ago
United
Fri, Nov 21 - Wed, Nov 26
DCA
Washington
DEC
Decatur
$359 Roundtrip, found 4 days ago
$359
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 21 from Washington to Decatur, returning Wed, Nov 26, priced at $359 found 4 days ago
Flights from Washington (DCA) to Decatur (DEC)
Origin airport
Ronald Reagan Washington National
Destination airport
Decatur
Airlines serving
United
Roundtrip price
$244
Distance
635 mi

Washington to Decatur Flights

The cheapest times to fly from Washington to Decatur

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 Washington to Decatur are during the month of November. You can find some of the cheapest flights from Washington to Decatur with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Decatur

Sunday is one of the best days to book for cheap flights from Washington to Decatur: 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 Washington to Decatur

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 Washington to Decatur in 2025. You can also book with separate airlines for your outbound and return journeys, from $396 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 Washington to Decatur 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 Washington to Decatur 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.

 

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC) cost?
Secure a cheap one-way flight from $396 or cheap return flight from $244 from Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC)?
The cheapest month to fly from DCA to DEC is November, when demand is low. Off-peak season is often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest DCA to DEC flight.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC)?
There aren't any daily direct flights departing from Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from DCA to DEC?
Typically you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can vary based on the airline, season 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 Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC)?
To avoid potential delays on the Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC) route, fly before 3 PM. Later departures 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 Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC) last-minute?
Last-minute fares from DCA to DEC are typically more expensive. To secure the lowest prices, start searching for flights ahead of time. That said, if you can play around with your travel dates, you may score a cheap ticket right before you leave.
Is it cheaper to book a DCA to DEC flight and hotel package?
Booking a DCA to DEC flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Pick from our wide range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Decatur Airport (DEC)?
You can usually reschedule or cancel your DCA to DEC flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.