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

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

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Flights from Carbondale (MDH) to St. Louis (STL)
Origin airport
Southern Illinois
Destination airport
Lambert-St. Louis Intl.
Distance
90 mi

Carbondale to St. Louis Flights

The cheapest times to fly from Carbondale to St. Louis

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

 

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

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

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 Carbondale to St. Louis 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 Carbondale to St. Louis 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 Carbondale to St. Louis 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 Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight or cheap return flight from Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for can help you save, as it's the cheapest month for flights between MDH and STL. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from MDH to STL. Then, sort your results by "Price (lowest to highest)" to score the best deal available.
How many flights per day from Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL)?
You'll have to book a flight with a layover if you're traveling from Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from MDH to STL?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL) route, travel before 3 PM. Departures after this time have a 22% higher chance of being 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 Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from MDH to STL shortly before your journey is generally more expensive. But if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a MDH to STL flight and hotel package?
You'll generally save money by booking a MDH to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your ideal accommodations and flights, consider other add-ons like activities, car rentals and tours.
Can I cancel or change the date of my flight from Carbondale, IL (MDH-Southern Illinois) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your MDH to STL flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

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