$100 Cheap Flights from Madison (MSN) to St. Louis (STL)

View $100 flight on Sun, Aug 31, 2025Opens in a new window

Popular airlines from Dane County Regional Airport (MSN) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Madison to St. Louis (MSN-STL)

Prices were available within the past 7 days and start at $100 for one-way flights and $199 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Aug 30 - Sun, Aug 31
MSN
Madison
STL
St. Louis
$199 Roundtrip, found 1 day ago
$199
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Aug 30 from Madison to St. Louis, returning Sun, Aug 31, priced at $199 found 1 day ago
Delta
Sat, Aug 30 - Sun, Aug 31
MSN
Madison
STL
St. Louis
$199 Roundtrip, found 1 day ago
$199
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Madison to St. Louis, returning Sun, Aug 31, priced at $199 found 1 day ago
Delta
Sat, Aug 30 - Sun, Aug 31
MSN
Madison
STL
St. Louis
$200 Roundtrip, found 1 day ago
$200
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Madison to St. Louis, returning Sun, Aug 31, priced at $200 found 1 day ago
Delta
Sat, Aug 30 - Wed, Sep 3
MSN
Madison
STL
St. Louis
$214 Roundtrip, found 1 day ago
$214
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Madison to St. Louis, returning Wed, Sep 3, priced at $214 found 1 day ago
Delta
Sun, Aug 31 - Wed, Sep 3
MSN
Madison
STL
St. Louis
$225 Roundtrip, found 1 day ago
$225
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Aug 31 from Madison to St. Louis, returning Wed, Sep 3, priced at $225 found 1 day ago
American Airlines
Wed, Aug 27 - Sat, Aug 30
MSN
Madison
STL
St. Louis
$227 Roundtrip, found 4 days ago
$227
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug 27 from Madison to St. Louis, returning Sat, Aug 30, priced at $227 found 4 days ago
United
Thu, Sep 25 - Sat, Sep 27
MSN
Madison
STL
St. Louis
$229 Roundtrip, found 2 hours ago
$229
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Sep 25 from Madison to St. Louis, returning Sat, Sep 27, priced at $229 found 2 hours ago
Delta
Sat, Aug 30 - Sun, Aug 31
MSN
Madison
STL
St. Louis
$231 Roundtrip, found 1 day ago
$231
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Madison to St. Louis, returning Sun, Aug 31, priced at $231 found 1 day ago
Delta
Sat, Aug 30 - Sun, Sep 7
MSN
Madison
STL
St. Louis
$234 Roundtrip, found 1 day ago
$234
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Madison to St. Louis, returning Sun, Sep 7, priced at $234 found 1 day ago
Delta
Sun, Aug 31 - Thu, Sep 4
MSN
Madison
STL
St. Louis
$238 Roundtrip, found 22 hours ago
$238
Roundtrip
found 22 hours ago
Select Delta flight, departing Sun, Aug 31 from Madison to St. Louis, returning Thu, Sep 4, priced at $238 found 22 hours ago

Find the cheapest month to fly from Madison (MSN) to St. Louis (STL)

October is typically the cheapest month to fly

From $178 - $517 per traveler.

Graph displaying average flight prices per month

Flights from Madison (MSN) to St. Louis (STL)
Origin airport
Dane County Regional
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$198
Distance
308 mi

Madison to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Madison 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 Madison 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 Madison to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $100 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 Madison 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 Madison 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 Dane County Regional Airport (MSN) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from MSN to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from MSN to STL?
The cheapest flights from MSN to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from MSN to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from MSN to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Dane County Regional Airport (MSN) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily nonstop flights departing from Dane County Regional Airport (MSN) to Lambert-St. Louis Intl. Airport (STL). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from MSN to STL?
Typically you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the airline, time of year 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 Dane County Regional Airport (MSN) to Lambert-St. Louis Intl. Airport (STL)?
Book a flight from Dane County Regional Airport (MSN) to Lambert-St. Louis Intl. Airport (STL) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this time have a 22% higher chance of being canceled, on average.**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 Dane County Regional Airport (MSN) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until just before your trip to book a flight from MSN to STL often results in higher prices. Although you may find some last-minute offers, they aren't always guaranteed. Be flexible with your itinerary for a better chance of landing a bargain.
Is it cheaper to book a MSN to STL flight and hotel package?
Booking a MSN to STL flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our impressive range of stays and then add activities, car rentals 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 Dane County Regional Airport (MSN) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you can cancel or reschedule your MSN to STL flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like more information, head to our Customer Service portal.

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*Available to One Key members.