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$195+ Cheap flights from St. Louis to Great Falls (STL - GTF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — GTF
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from St. Louis to Great Falls

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Great Falls (GTF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$388
(United Airlines)

One-way from

$195
(Alaska Airlines)

Popular in

December

Cheapest in

November

Average price

$631
From Lambert-St Louis to Great Falls
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One-way flight from Lambert-St Louis to Great Falls
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 5% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Great Falls

Cheapest flights from St. Louis to Great Falls
Explore the most affordable flight options available from St. Louis to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/104:50 pmSTL - GTF
1 stop5h 21mUnited Airlines
Tue 10/142:31 pmGTF - STL
1 stop5h 15mUnited Airlines
Deal found 9/15$388
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:50 amSTL - GTF
1 stop6h 38mDelta
Sun 10/196:09 pmGTF - STL
1 stop5h 15mDelta
Deal found 9/15$398
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1312:25 pmSTL - GTF
2 stops9h 46mUnited Airlines
Mon 10/202:31 pmGTF - STL
1 stop5h 15mUnited Airlines
Deal found 9/15$468
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:00 amSTL - GTF
2 stops9h 26mUnited Airlines
Sun 10/192:31 pmGTF - STL
1 stop5h 15mUnited Airlines
Deal found 9/15$484
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/304:50 pmSTL - GTF
1 stop5h 21mUnited Airlines
Sat 10/42:31 pmGTF - STL
1 stop5h 15mUnited Airlines
Deal found 9/15$538
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:10 amSTL - GTF
2 stops32h 25mAlaska Airlines
Sun 10/196:15 pmGTF - STL
2 stops27h 50mAlaska Airlines
Deal found 9/15$586

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Great Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from St. Louis to Great Falls that are best for you.

Fly from

St. Louis

Fly to

Great Falls

Route

Depart

Return

Price

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 10/10

4:50 pm-9:11 pm

1 stop5h 21m

Great Falls

Tue 10/14

2:31 pm-8:46 pm

1 stop5h 15m

$388

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 10/16

6:50 am-12:28 pm

1 stop6h 38m

Great Falls

Sun 10/19

6:09 pm-12:24 am

1 stop5h 15m

$398

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Mon 10/13

4:50 pm-9:11 pm

1 stop5h 21m

Great Falls

Mon 10/20

2:31 pm-8:46 pm

1 stop5h 15m

$398

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 10/16

5:00 am-1:26 pm

2 stops9h 26m

Great Falls

Sun 10/19

2:31 pm-8:46 pm

1 stop5h 15m

$484

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 9/30

4:50 pm-9:11 pm

1 stop5h 21m

Great Falls

Sat 10/4

2:31 pm-8:46 pm

1 stop5h 15m

$538

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 10/15

6:33 am-5:35 pm

1 stop12h 02m

$195

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 10/15

12:25 pm-9:11 pm

2 stops9h 46m

$228

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 10/15

10:22 am-5:35 pm

3 stops56h 13m

$489

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Best time to book a flight from St. Louis to Great Falls

Have a flexible travel schedule? Discover the best time to fly to Great Falls from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Great Falls

Get insights into the airlines that provide service to Great Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Great Falls. Reviews last updated September 16, 2025.
Get a feel of what it's like to fly with United Airlines from St. Louis to Great Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,929 reviews

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Great Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Great Falls?

    Airlines like United Airlines and Delta fly from St. Louis to Great Falls in about 5h 21m. The time it takes to get you to your destination can typically vary by up to 1h 17m. Airlines will cover a distance of 1212 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from St. Louis to Great Falls round-trip?

    Flying on United Airlines is currently your cheapest option to Great Falls, with prices starting at $298. United Airlines is 45% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from St. Louis to Great Falls that include hotel bookings?

    Yes. In addition to deals on St. Louis to Great Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Great Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Great Falls.

  • Can I find deals for business class flights from St. Louis to Great Falls?

    Yes. Cheapflights offers flight deals from St. Louis to Great Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Great Falls?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Great Falls (average of $367). Flying from St. Louis to Great Falls in July is currently the most expensive (average of $574). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from St. Louis to Great Falls

Discover the top airline that operate flights from St. Louis to Great Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$298Average$637FlexibilityNo cancel feeOn-time69%

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