$310 Cheap Flights from St. Louis (STL) to Butte (BTM)

View $310 flight on Tue, Apr 14, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Butte, MT (BTM-Bert Mooney)

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Cheap Flights from St. Louis to Butte (STL-BTM)

Prices were available within the past 7 days and start at $310 for one-way flights and $294 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Mar 24 - Tue, Mar 31
STL
St. Louis
BTM
Butte
$294 Roundtrip, found 4 days ago
$294
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Mar 24 from St. Louis to Butte, returning Tue, Mar 31, priced at $294 found 4 days ago
Delta
Sun, May 24 - Sun, May 31
STL
St. Louis
BTM
Butte
$379 Roundtrip, found 6 days ago
$379
Roundtrip
found 6 days ago
Select Delta flight, departing Sun, May 24 from St. Louis to Butte, returning Sun, May 31, priced at $379 found 6 days ago
United
Fri, Mar 27 - Wed, Apr 1
STL
St. Louis
BTM
Butte
$389 Roundtrip, found 4 days ago
$389
Roundtrip
found 4 days ago
Select United flight, departing Fri, Mar 27 from St. Louis to Butte, returning Wed, Apr 1, priced at $389 found 4 days ago
Delta
Sun, May 24 - Mon, Jun 1
STL
St. Louis
BTM
Butte
$404 Roundtrip, found 6 days ago
$404
Roundtrip
found 6 days ago
Select Delta flight, departing Sun, May 24 from St. Louis to Butte, returning Mon, Jun 1, priced at $404 found 6 days ago
Delta
Tue, Mar 24 - Mon, Mar 30
STL
St. Louis
BTM
Butte
$409 Roundtrip, found 4 days ago
$409
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Mar 24 from St. Louis to Butte, returning Mon, Mar 30, priced at $409 found 4 days ago
United
Mon, Mar 23 - Wed, Apr 1
STL
St. Louis
BTM
Butte
$414 Roundtrip, found 4 days ago
$414
Roundtrip
found 4 days ago
Select United flight, departing Mon, Mar 23 from St. Louis to Butte, returning Wed, Apr 1, priced at $414 found 4 days ago
Delta
Mon, Mar 23 - Tue, Mar 31
STL
St. Louis
BTM
Butte
$415 Roundtrip, found 4 days ago
$415
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Mar 23 from St. Louis to Butte, returning Tue, Mar 31, priced at $415 found 4 days ago
Delta
Wed, Mar 25 - Sun, Mar 29
STL
St. Louis
BTM
Butte
$419 Roundtrip, found 4 days ago
$419
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Mar 25 from St. Louis to Butte, returning Sun, Mar 29, priced at $419 found 4 days ago
Delta
Sat, Mar 28 - Tue, Mar 31
STL
St. Louis
BTM
Butte
$430 Roundtrip, found 4 days ago
$430
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Mar 28 from St. Louis to Butte, returning Tue, Mar 31, priced at $430 found 4 days ago
United
Wed, Mar 25 - Sun, Mar 29
STL
St. Louis
BTM
Butte
$447 Roundtrip, found 4 days ago
$447
Roundtrip
found 4 days ago
Select United flight, departing Wed, Mar 25 from St. Louis to Butte, returning Sun, Mar 29, priced at $447 found 4 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Bert Mooney Airport (BTM) cost?
Grab a cheap one-way flight from $310 or cheap return flight from $294 from Lambert-St. Louis Intl. Airport (STL) to Bert Mooney Airport (BTM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Bert Mooney Airport (BTM)?
The cheapest month to fly from STL to BTM is March, when demand is low. Off-peak months are generally when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Bert Mooney Airport (BTM)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to BTM flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Bert Mooney Airport (BTM)?
There aren't any daily direct flights from Lambert-St. Louis Intl. Airport (STL) to Bert Mooney Airport (BTM). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from STL to BTM?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*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 Bert Mooney Airport (BTM)?
To touch down at Bert Mooney Airport (BTM) without delays, choose a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance 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 Bert Mooney Airport (BTM) last-minute?
Booking your flight from STL to BTM right before your getaway is typically more expensive. But if you're flexible with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to BTM flight and hotel package?
You'll typically save money by booking a STL to BTM flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've selected your preferred accommodations and flights, consider other add-ons like car rentals, activities and tours.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Bert Mooney Airport (BTM)?
Typically, it's possible to reschedule or cancel your STL to BTM flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if 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
Bert Mooney
Roundtrip price
$294
Distance
1229 mi

Book with confidence

St. Louis to Butte Flights

The cheapest times to fly from St. Louis to Butte

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

 

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

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

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 Butte in 2026. You can also book with separate airlines for your outbound and return journeys, from $310 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 Butte 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 Butte 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 Butte Flights

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