Cheap Flights from St. Louis (STL) to Carbondale (MDH)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois)

Alternative airports near Carbondale

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Williamson County Regional MWA. Cheapest option available. Average driving time to city center is 19 minutes. Flights from $474
MWA
Williamson County Regional
Cheapest
Average driving time to city center19 min
Flights from $474

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois) cost?
Get a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) 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 Lambert-St. Louis Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois)?
Flying in can help you save, as it's the cheapest month for flights between STL and MDH. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to MDH flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) 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 click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to MDH?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change 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 Lambert-St. Louis Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois)?
To land at Carbondale, IL (MDH-Southern Illinois) on time, choose a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Lambert-St. Louis Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois) last-minute?
Last-minute bookings from STL to MDH are typically more expensive. To lock in the best prices, start searching for flights ahead of time. That being said, if you're flexible with your travel dates, you may score a cheap ticket right before your trip.
Is it cheaper to book a STL to MDH flight and hotel package?
Securing a STL to MDH flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our extensive range of hotels and then add car rentals, activities and flights 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 Lambert-St. Louis Intl. Airport (STL) to Carbondale, IL (MDH-Southern Illinois)?
If you booked your STL to MDH flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket 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, head to our Customer Service portal for more details.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Southern Illinois
Distance
90 mi

Book with confidence

Book with confidence

St. Louis to Carbondale Flights

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

 

The best time to book a flight from St. Louis to Carbondale

Sunday is one of the best days to book for cheap flights from St. Louis 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 St. Louis 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 St. Louis to Carbondale in 2025. 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 St. Louis 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 St. Louis 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.

 

St. Louis to Carbondale Flights

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*Available to One Key members.