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$338+ Cheap flights from St. Louis to Great Falls (STL - GTF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — GTF
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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Cheap 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 March 22, 2026.

This Delta deal was found by Cheapflights users on 3/18. 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.
Sat 5/305:00 pm
STL
-
GTF
1 stop6h 26m
Delta
Thu 6/46:19 pm
GTF
-
STL
1 stop5h 11m
Delta
Deal found 3/18$338
This Delta deal was found by Cheapflights users on 3/20. 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.
Fri 5/2910:19 am
STL
-
GTF
2 stops13h 07m
Delta
Wed 6/36:19 pm
GTF
-
STL
1 stop5h 11m
Delta
Deal found 3/20$344
This United Airlines deal was found by Cheapflights users on 3/21. 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 8/204:40 pm
STL
-
GTF
1 stop5h 48m
United Airlines
Mon 8/242:31 pm
GTF
-
STL
1 stop5h 08m
United Airlines
Deal found 3/21$350
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Sat 5/309:23 am
STL
-
GTF
2 stops13h 11m
United Airlines
Wed 6/32:37 pm
GTF
-
STL
1 stop5h 06m
United Airlines
Deal found 3/18$385
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Wed 4/298:54 am
STL
-
GTF
1 stop5h 37m
United Airlines
Sat 5/22:35 pm
GTF
-
STL
1 stop5h 08m
United Airlines
Deal found 3/17$418
This United Airlines deal was found by Cheapflights users on 3/19. 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.
Sat 4/188:54 am
STL
-
GTF
1 stop5h 37m
United Airlines
Mon 4/202:30 pm
GTF
-
STL
1 stop5h 24m
United Airlines
Deal found 3/19$422
This United Airlines deal was found by Cheapflights users on 3/20. 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 5/294:48 pm
STL
-
GTF
1 stop5h 46m
United Airlines
Wed 6/32:37 pm
GTF
-
STL
1 stop5h 06m
United Airlines
Deal found 3/20$423

Find 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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$338
(Delta)

Popular in

December

Cheapest in

November

Average price

$365
Provider with most accurate pricing for Lambert-St Louis-Great Falls flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Great Falls flights.
Search Deals
From Lambert-St Louis to Great Falls
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 22, 2026.
Use the filters below to find and compare flights from St. Louis to Great Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 5/29

10:19 am-10:26 pm

2 stops13h 07m

Great Falls

Wed 6/3

6:19 pm-12:30 am

1 stop5h 11m

$344

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Thu 8/20

4:40 pm-9:28 pm

1 stop5h 48m

Great Falls

Mon 8/24

2:31 pm-8:39 pm

1 stop5h 08m

$350

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 5/30

9:23 am-9:34 pm

2 stops13h 11m

Great Falls

Wed 6/3

2:37 pm-8:43 pm

1 stop5h 06m

$385
Quickest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 4/29

8:54 am-1:31 pm

1 stop5h 37m

Great Falls

Sat 5/2

2:35 pm-8:43 pm

1 stop5h 08m

$418

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Fri 5/29

4:48 pm-9:34 pm

1 stop5h 46m

Great Falls

Wed 6/3

2:37 pm-8:43 pm

1 stop5h 06m

$423

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 4/18

9:16 am-9:17 pm

2 stops13h 01m

Great Falls

Mon 4/20

2:30 pm-8:54 pm

1 stop5h 24m

$427

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Wed 4/1

2:40 pm-9:17 pm

1 stop7h 37m

Great Falls

Sun 4/5

2:30 pm-8:54 pm

1 stop5h 24m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Sorted by cheapest first

Compare providers for flights from St. Louis to Great Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Great Falls in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Great Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Great Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Great Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Great Falls flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Great Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 March 22, 2026.
Get a feel of what it's like to fly with Delta and 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.
Delta
7.9
Good
8,314 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,314 reviews
Delta
7.9
Good
8,314 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,455 reviews
Delta
7.9
Good
8,314 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 and United Airlines fly from St. Louis to Great Falls in about 5h 48m. The time it takes to get you to your destination can typically vary by up to 7h 19m. Airlines will cover a distance of 1212 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from St. Louis to Great Falls round-trip?

    Flying on Delta is currently your cheapest option to Great Falls, with prices starting at $241. Another option worth looking into is United Airlines, starting at $246 round trip. Delta 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.

See more FAQs

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Top 2 airlines flying from St. Louis to Great Falls

Discover the top 2 airlines 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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$241Average$465FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$246Average$485FlexibilityNo cancel feeOn-time69%

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