$253 Cheap Flights from St. Louis (STL) to Marion (MWA)

View $253 flight on Sun, Mar 8, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Marion, IL (MWA-Williamson County Regional)

Cheap Flights from St. Louis to Marion (STL-MWA)

Prices were available within the past 7 days and start at $253 for one-way flights and $250 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, Jan 25 - Thu, Jan 29
STL
St. Louis
MWA
Marion
$250 Roundtrip, found 1 day ago
$250
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Jan 25 from St. Louis to Marion, returning Thu, Jan 29, priced at $250 found 1 day ago
American Airlines
Tue, Feb 3 - Sat, Feb 7
STL
St. Louis
MWA
Marion
$290 Roundtrip, found 1 day ago
$290
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Feb 3 from St. Louis to Marion, returning Sat, Feb 7, priced at $290 found 1 day ago
American Airlines
Tue, Jan 27 - Sat, Jan 31
STL
St. Louis
MWA
Marion
$293 Roundtrip, just found
$293
Roundtrip
just found
Select American Airlines flight, departing Tue, Jan 27 from St. Louis to Marion, returning Sat, Jan 31, priced at $293 just found
American Airlines
Fri, Feb 20 - Tue, Feb 24
STL
St. Louis
MWA
Marion
$296 Roundtrip, found 3 days ago
$296
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Marion, returning Tue, Feb 24, priced at $296 found 3 days ago
United
Sat, Feb 14 - Wed, Feb 18
STL
St. Louis
MWA
Marion
$306 Roundtrip, just found
$306
Roundtrip
just found
Select United flight, departing Sat, Feb 14 from St. Louis to Marion, returning Wed, Feb 18, priced at $306 just found
United
Sun, Jan 25 - Thu, Jan 29
STL
St. Louis
MWA
Marion
$310 Roundtrip, found 1 day ago
$310
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from St. Louis to Marion, returning Thu, Jan 29, priced at $310 found 1 day ago
United
Tue, Jan 27 - Sat, Jan 31
STL
St. Louis
MWA
Marion
$313 Roundtrip, just found
$313
Roundtrip
just found
Select United flight, departing Tue, Jan 27 from St. Louis to Marion, returning Sat, Jan 31, priced at $313 just found
American Airlines
Sun, Jan 25 - Thu, Jan 29
STL
St. Louis
MWA
Marion
$325 Roundtrip, found 1 day ago
$325
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Jan 25 from St. Louis to Marion, returning Thu, Jan 29, priced at $325 found 1 day ago
American Airlines
Tue, Jan 27 - Sat, Jan 31
STL
St. Louis
MWA
Marion
$333 Roundtrip, just found
$333
Roundtrip
just found
Select American Airlines flight, departing Tue, Jan 27 from St. Louis to Marion, returning Sat, Jan 31, priced at $333 just found
United
Sat, Dec 13 - Wed, Dec 17
STL
St. Louis
MWA
Marion
$333 Roundtrip, just found
$333
Roundtrip
just found
Select United flight, departing Sat, Dec 13 from St. Louis to Marion, returning Wed, Dec 17, priced at $333 just found

Alternative airports near Marion

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

Select flight to Williamson County Regional MWA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $962
MWA
Williamson County Regional
CheapestClosest
Average driving time to city center8 min
Flights from $962

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA) cost?
Grab a cheap one-way flight from $253 or cheap return flight from $250 from Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA) 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 Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA)?
January is the least expensive month to fly from STL to MWA. Traveling during quieter months is often the key to scoring lower fares.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA)?
To find the cheapest airline that'll fly you from STL to MWA, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA) 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 dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to MWA?
You'll typically find Tuesday the quietest day for flights, while Fridays are often 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 Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA)?
Choose a flight from Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this 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 Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA) last-minute?
Last-minute fares from STL to MWA are usually more expensive. For the best prices, start searching for flights well in advance. That said, if you're flexible with your travel dates, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a STL to MWA flight and hotel package?
Booking a STL to MWA flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our extensive range of stays and then add car rentals, flights 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 Lambert-St. Louis Intl. Airport (STL) to Williamson County Regional Airport (MWA)?
You can usually cancel or reschedule your STL to MWA flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Williamson County Regional
Roundtrip price
$250
Distance
100 mi

Book with confidence

St. Louis to Marion Flights

The cheapest times to fly from St. Louis to Marion

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

 

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

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

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 Marion in 2025. You can also book with separate airlines for your outbound and return journeys, from $253 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 Marion 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 Marion 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 Marion Flights

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*Available to One Key members.