Cheap Flights from Washington (DCA) to Carbondale (MDH)

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois)

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Flights from Washington (DCA) to Carbondale (MDH)
Origin airport
Ronald Reagan Washington National
Destination airport
Southern Illinois
Distance
665 mi

Washington to Carbondale Flights

The cheapest times to fly from Washington to Carbondale

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

 

The best time to book a flight from Washington to Carbondale

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

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 Carbondale in 2026. You can also book with separate airlines for your outbound and return journeys, from 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 Carbondale 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 Carbondale 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 Carbondale, IL (MDH-Southern Illinois) cost?
Lock in a cheap one-way flight or cheap return flight from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois)?
The cheapest month to fly from DCA to MDH is , when demand is low. Off-peak season is typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois)?
To find the cheapest airline that'll fly you from DCA to MDH, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois)?
Nonstop flights from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DCA to MDH?
Usually you'll find the widest variety of flight choices 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 Carbondale, IL (MDH-Southern Illinois)?
Book a flight from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois) that leaves before 3 PM to reduce the risk of delays and cancellations. Later departures are on average 22% more likely to be canceled.**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 Carbondale, IL (MDH-Southern Illinois) last-minute?
Booking your ticket from DCA to MDH just before your trip is usually more expensive. However, if there's some wiggle room with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a DCA to MDH flight and hotel package?
Compared with arranging hotels and flights separately, booking a DCA to MDH flight and hotel package with Expedia could result in significant savings. Better yet, managing everything in one place will take the stress out of planning your trip. Simply pick your flights and choose from our extensive range of stays, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Carbondale, IL (MDH-Southern Illinois)?
If you booked your DCA to MDH flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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