$164 Cheap Flights from St. Louis (STL) to Great Falls (GTF)

View $164 flight on Sat, Feb 21, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Great Falls, MT (GTF-Great Falls Intl.)

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Cheap Flights from St. Louis to Great Falls (STL-GTF)

Prices were available within the past 7 days and start at $164 for one-way flights and $323 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bargain Flight
Sat, Feb 21 - Sat, Feb 28
STL
St. Louis
GTF
Great Falls
$323 Roundtrip, found 6 days ago
$323
Roundtrip
found 6 days ago
Select Bargain Flight flight, departing Sat, Feb 21 from St. Louis to Great Falls, returning Sat, Feb 28, priced at $323 found 6 days ago
Alaska Airlines
Wed, Feb 18 - Sat, Feb 28
STL
St. Louis
GTF
Great Falls
$328 Roundtrip, found 6 days ago
$328
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Feb 18 from St. Louis to Great Falls, returning Sat, Feb 28, priced at $328 found 6 days ago
United
Sat, Feb 21 - Sat, Feb 28
STL
St. Louis
GTF
Great Falls
$328 Roundtrip, found 6 days ago
$328
Roundtrip
found 6 days ago
Select United flight, departing Sat, Feb 21 from St. Louis to Great Falls, returning Sat, Feb 28, priced at $328 found 6 days ago
Delta
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
GTF
Great Falls
$328 Roundtrip, found 6 days ago
$328
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Jan 20 from St. Louis to Great Falls, returning Tue, Feb 3, priced at $328 found 6 days ago
Delta
Sat, Feb 21 - Sat, Feb 28
STL
St. Louis
GTF
Great Falls
$331 Roundtrip, found 6 days ago
$331
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Feb 21 from St. Louis to Great Falls, returning Sat, Feb 28, priced at $331 found 6 days ago
Hawaiian Airlines
Tue, Jan 20 - Tue, Jan 27
STL
St. Louis
GTF
Great Falls
$332 Roundtrip, found 2 days ago
$332
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Jan 20 from St. Louis to Great Falls, returning Tue, Jan 27, priced at $332 found 2 days ago
Delta
Sat, Jan 10 - Tue, Jan 20
STL
St. Louis
GTF
Great Falls
$334 Roundtrip, found 6 days ago
$334
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Jan 10 from St. Louis to Great Falls, returning Tue, Jan 20, priced at $334 found 6 days ago
Alaska Airlines
Wed, Feb 18 - Sun, Mar 1
STL
St. Louis
GTF
Great Falls
$338 Roundtrip, found 6 days ago
$338
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Feb 18 from St. Louis to Great Falls, returning Sun, Mar 1, priced at $338 found 6 days ago
Hawaiian Airlines
Mon, Feb 23 - Wed, Mar 4
STL
St. Louis
GTF
Great Falls
$340 Roundtrip, found 6 days ago
$340
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Mon, Feb 23 from St. Louis to Great Falls, returning Wed, Mar 4, priced at $340 found 6 days ago
Hawaiian Airlines
Sat, Dec 6 - Tue, Dec 9
STL
St. Louis
GTF
Great Falls
$342 Roundtrip, found 2 days ago
$342
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, Dec 6 from St. Louis to Great Falls, returning Tue, Dec 9, priced at $342 found 2 days ago

Alternative airports near Great Falls

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

Select flight to Great Falls Intl. GTF. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $507
GTF
Great Falls Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $507

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF) cost?
Snag a cheap one-way flight from $164 or cheap return flight from $323 from Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF) 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 Great Falls Intl. Airport (GTF)?
February is the least expensive month to fly from STL to GTF. Timing your trip outside of the busy season is often the key to finding better fares.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF)?
To find the cheapest airline flying from STL to GTF, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF)?
You'll need to book a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from STL to GTF?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary 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 Great Falls Intl. Airport (GTF)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF) route, fly before 3 PM. Departures after this hour 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 Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF) last-minute?
Last-minute fares from STL to GTF are usually more expensive. For the best rates, start looking for flights early. That said, if you can play around with your travel dates, it's possible to land a cheap fare just before your departure.
Is it cheaper to book a STL to GTF flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to GTF flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place takes the hassle out of travel planning. Simply pick your flights and select from our extensive range of stays, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Great Falls Intl. Airport (GTF)?
If you booked your STL to GTF flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, 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 for further details.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Great Falls Intl.
Airlines serving
Delta, United
Roundtrip price
$323
Distance
1213 mi

Book with confidence

St. Louis to Great Falls Flights

The cheapest times to fly from St. Louis to Great Falls

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

 

The best time to book a flight from St. Louis to Great Falls

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

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 Great Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $164 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 Great Falls 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 Great Falls 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 Great Falls Flights

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*Available to One Key members.