$333+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — GTF
Oct 16 — Oct 231
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Great Falls with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Great Falls
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to Great FallsExplore 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, 2026.
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, 2026.
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 11/54:39 pm -
1 stop5h 59m
Sun 11/82:45 pm -
1 stop5h 16m
Deal found 9/15![United Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 9/13. 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 10/307:45 am -
1 stop5h 53m
Thu 11/55:40 am -
1 stop6h 52m
Deal found 9/13![Delta logo]()
$378
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/294:39 pm -
1 stop5h 43m
Sat 10/36:15 am -
1 stop5h 25m
Deal found 9/14![United Airlines logo]()
$418
This Delta deal was found by Cheapflights users on 9/11. 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 9/188:00 am -
1 stop5h 35m
Tue 9/226:21 pm -
1 stop5h 23m
Deal found 9/11![Delta logo]()
$488
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/261:27 pm -
2 stops8h 55m
Wed 9/302:37 pm -
1 stop4h 59m
Deal found 9/11![United Airlines logo]()
$494
Best flights from St. Louis to Great FallsDiscover carefully curated flight deals from St. Louis to Great Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2026.
Discover carefully curated flight deals from St. Louis to Great Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2026.
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 11/54:39 pm -
1 stop5h 59m
Sun 11/82:45 pm -
1 stop5h 16m
Deal found 9/15![United Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 9/13. 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 10/3012:28 pm -
2 stops11h 12m
Thu 11/56:27 pm -
2 stops13h 50m
Deal found 9/13![Delta logo]()
$584
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/291:29 pm -
2 stops8h 53m
Sat 10/36:15 am -
2 stops12h 26m
Deal found 9/14![United Airlines logo]()
$448
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/269:00 am -
1 stop5h 41m
Wed 9/302:37 pm -
1 stop8h 07m
Deal found 9/11![United Airlines logo]()
$488
This Delta deal was found by Cheapflights users on 9/13. 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.
Mon 10/126:47 am -
2 stops12h 00m
Mon 10/196:27 pm -
1 stop5h 17m
Deal found 9/13![Delta logo]()
$773
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/124:39 pm -
1 stop5h 43m
Mon 10/192:37 pm -
1 stop8h 07m
Deal found 9/13![United Airlines logo]()
$696
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Sun 9/279:00 am -
1 stop5h 41m
Thu 10/12:37 pm -
1 stop8h 07m
Deal found 9/11![United Airlines logo]()
$866
Last-minute flights from St. Louis to Great FallsDiscover last-minute flight deals from St. Louis to Great Falls. Data last updated September 16, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Great Falls. Data last updated September 16, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/11. 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 9/188:00 am -
1 stop5h 35m
Tue 9/226:21 pm -
1 stop5h 23m
Deal found 9/11![Delta logo]()
$488
This United Airlines deal was found by Cheapflights users on 9/12. 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 9/1812:59 pm -
2 stops9h 13m
Tue 9/226:15 am -
1 stop5h 25m
Deal found 9/12![United Airlines logo]()
$614
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/294:39 pm -
1 stop5h 43m
Sat 10/36:15 am -
1 stop5h 25m
Deal found 9/14![United Airlines logo]()
$418
This Delta deal was found by Cheapflights users on 9/13. 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 10/307:45 am -
1 stop5h 53m
Thu 11/55:40 am -
1 stop6h 52m
Deal found 9/13![Delta logo]()
$378
One-way flights from St. Louis to Great FallsSearch for one-way flight options from St. Louis to Great Falls. Find affordable one-way fares based on user searches. Data last updated September 16, 2026.
Search for one-way flight options from St. Louis to Great Falls. Find affordable one-way fares based on user searches. Data last updated September 16, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/94:39 pm -
1 stop5h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![United Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:30 pm -
3 stops44h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$514
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 September 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $348 (United Airlines) |
Popular in | December |
Cheapest in | November |
Average price | $497 |
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 7,457,451 searches. Data last updated September 16, 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
Cheapest round-trip
Quickest round-trip
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Fri 10/9
4:39 pm-9:22 pm
1 stop5h 43m
Great Falls
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$333
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Thu 11/5
4:39 pm-9:38 pm
1 stop5h 59m
Great Falls
Sun 11/8
2:45 pm-9:01 pm
1 stop5h 16m
$348
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Tue 9/29
1:29 pm-9:22 pm
2 stops8h 53m
Great Falls
Sat 10/3
6:15 am-7:41 pm
2 stops12h 26m
$448
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Sat 9/26
9:00 am-1:41 pm
1 stop5h 41m
Great Falls
Wed 9/30
2:37 pm-11:44 pm
1 stop8h 07m
$488
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Fri 10/9
1:30 pm-9:01 am
3 stops44h 31m
Great Falls
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$514
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Fri 10/30
12:28 pm-10:40 pm
2 stops11h 12m
Great Falls
Thu 11/5
6:27 pm-9:17 am
2 stops13h 50m
$584
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Mon 10/12
4:39 pm-9:22 pm
1 stop5h 43m
Great Falls
Mon 10/19
2:37 pm-11:44 pm
1 stop8h 07m
$696
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Mon 10/12
6:47 am-5:47 pm
2 stops12h 00m
Great Falls
Mon 10/19
6:27 pm-12:44 am
1 stop5h 17m
$773
St. LouisGreat Falls
STL Lambert-St Louis - GTF Great Falls
STLGTF
Lambert-St Louis
Sun 9/27
9:00 am-1:41 pm
1 stop5h 41m
Great Falls
Thu 10/1
2:37 pm-11:44 pm
1 stop8h 07m
$866
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
STL-GTF
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, 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.
Boarding
8.1
Food
7.2
Comfort
7.8
Entertainment
7.8
Overall
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Food
7.2
Comfort
7.8
Entertainment
7.8
Overall
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Food
7.2
Comfort
7.8
Entertainment
7.8
Overall
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
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.
Traveling to a place near Great Falls?
Book flights to Great Falls if you plan to visit one of these locationsShelby
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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 7,457,451 searches. Data last updated September 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$246 | Average$458 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$261 | Average$465 | FlexibilityNo cancel fee | On-timeN/A |