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$200+ 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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — GTF
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
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 August 20, 2025.

Round-trip from

$396
(Delta)

One-way from

$200
(Delta)

Popular in

December

Cheapest in

November

Average price

$483
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, 0% 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 August 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 August 20, 2025.

This Delta deal was found by Cheapflights users on 8/17. 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.
Sat 10/256:50 amSTL - GTF
1 stop6h 38mDelta
Wed 10/296:09 pmGTF - STL
1 stop5h 15mDelta
Deal found 8/17$396
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 10/163:57 pmSTL - GTF
1 stop26h 38mAlaska Airlines
Sun 10/196:15 pmGTF - STL
1 stop28h 48mAlaska Airlines
Deal found 8/17$430
This Delta deal was found by Cheapflights users on 8/18. 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 8/18$475
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Wed 9/104:40 pmSTL - GTF
1 stop5h 48mUnited Airlines
Wed 9/172:35 pmGTF - STL
1 stop5h 11mUnited Airlines
Deal found 8/18$504
This Delta deal was found by Cheapflights users on 8/18. 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.
Tue 9/25:30 pmSTL - GTF
1 stop6h 15mDelta
Sat 9/66:00 amGTF - STL
1 stop7h 30mDelta
Deal found 8/18$514
This United Airlines deal was found by Cheapflights users on 8/17. 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 10/1612:25 pmSTL - GTF
2 stops9h 46mUnited Airlines
Sun 10/197:00 amGTF - STL
1 stop4h 44mUnited Airlines
Deal found 8/17$526
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/18:15 amSTL - GTF
2 stops14h 13mUnited Airlines
Tue 9/92:35 pmGTF - STL
2 stops22h 44mUnited Airlines
Deal found 8/18$531

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 August 20, 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

Sat 10/25

6:50 am-12:28 pm

1 stop6h 38m

Great Falls

Wed 10/29

6:09 pm-12:24 am

1 stop5h 15m

$396

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 10/16

3:57 pm-5:35 pm

1 stop26h 38m

Great Falls

Sun 10/19

6:15 pm-12:03 am

1 stop28h 48m

$430

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

$475

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 12/16

7:30 am-12:29 pm

1 stop5h 59m

$200

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 12/17

7:30 am-12:29 pm

1 stop5h 59m

$233

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 12/18

5:34 pm-9:35 pm

1 stop29h 01m

$235

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 1/2

5:26 pm-6:41 pm

1 stop26h 15m

$244

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Mon 12/15

3:23 pm-6:55 pm

1 stop28h 32m

$253

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sun 1/4

7:10 am-12:31 pm

1 stop6h 21m

$253

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 1/3

6:04 am-5:43 pm

2 stops12h 39m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 15 results
1
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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 August 20, 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
8,928 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

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
8,928 reviews
United Airlines
7.4
Good
8,928 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

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 Delta fly from St. Louis to Great Falls in about 6h 38m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 1212 mi.

  • 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$298Average$643FlexibilityNo cancel feeOn-time69%

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