$429+ Cheap flights from St. Louis to Helena (STL - HLN)
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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HLN
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Helena 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 Helena
Cheapest
Best
Last-minute
Cheapest flights from St. Louis to HelenaExplore the most affordable flight options available from St. Louis to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from St. Louis to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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.
Tue 9/226:29 am -
1 stop11h 12m
Sat 9/265:18 pm -
1 stop20h 03m
Deal found 9/7![Alaska Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 9/8. 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 9/264:49 pm -
1 stop5h 29m
Sat 10/32:30 pm -
1 stop8h 14m
Deal found 9/8![United Airlines logo]()
$484
This Delta deal was found by Cheapflights users on 9/7. 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 9/2212:00 pm -
2 stops11h 24m
Sat 9/2612:57 pm -
1 stop7h 34m
Deal found 9/7![Delta logo]()
$499
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/3011:35 am -
2 stops10h 43m
Tue 10/132:30 pm -
1 stop5h 06m
Deal found 9/9![United Airlines logo]()
$529
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/244:39 pm -
1 stop5h 39m
Mon 9/282:30 pm -
1 stop8h 14m
Deal found 9/9![United Airlines logo]()
$559
This United Airlines deal was found by Cheapflights users on 9/5. 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 10/16:00 am -
2 stops8h 48m
Sun 10/46:25 am -
1 stop5h 15m
Deal found 9/5![United Airlines logo]()
$765
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 9/303:19 pm -
1 stop26h 22m
Tue 10/135:26 pm -
1 stop21h 18m
Deal found 9/9![Alaska Airlines logo]()
$821
Best flights from St. Louis to HelenaDiscover carefully curated flight deals from St. Louis to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from St. Louis to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This United Airlines deal was found by Cheapflights users on 9/9. 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 2/69:13 am -
1 stop5h 14m
Tue 2/92:30 pm -
1 stop5h 29m
Deal found 9/9![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 9/7. 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 9/2212:00 pm -
2 stops11h 24m
Sat 9/2612:57 pm -
1 stop7h 34m
Deal found 9/7![Delta logo]()
$499
This United Airlines deal was found by Cheapflights users on 9/8. 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 9/264:49 pm -
1 stop5h 29m
Sat 10/32:30 pm -
1 stop8h 14m
Deal found 9/8![United Airlines logo]()
$484
Last-minute flights from St. Louis to HelenaDiscover last-minute flight deals from St. Louis to Helena. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Helena. Data last updated September 10, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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.
Tue 9/226:29 am -
1 stop11h 12m
Sat 9/265:18 pm -
1 stop20h 03m
Deal found 9/7![Alaska Airlines logo]()
$444
This Delta deal was found by Cheapflights users on 9/7. 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 9/2212:00 pm -
2 stops11h 24m
Sat 9/2612:57 pm -
1 stop7h 34m
Deal found 9/7![Delta logo]()
$499
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/244:39 pm -
1 stop5h 39m
Mon 9/282:30 pm -
1 stop8h 14m
Deal found 9/9![United Airlines logo]()
$559
This United Airlines deal was found by Cheapflights users on 9/8. 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 9/264:49 pm -
1 stop5h 29m
Sat 10/32:30 pm -
1 stop8h 14m
Deal found 9/8![United Airlines logo]()
$484
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/3011:35 am -
2 stops10h 43m
Tue 10/132:30 pm -
1 stop5h 06m
Deal found 9/9![United Airlines logo]()
$529
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 9/303:19 pm -
1 stop26h 22m
Tue 10/135:26 pm -
1 stop21h 18m
Deal found 9/9![Alaska Airlines logo]()
$821
This United Airlines deal was found by Cheapflights users on 9/5. 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 10/16:00 am -
2 stops8h 48m
Sun 10/46:25 am -
1 stop5h 15m
Deal found 9/5![United Airlines logo]()
$765
Find flight deals from St. Louis to Helena
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Helena (HLN). 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 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $429 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Helena 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 10, 2026.
Use the filters below to find and compare flights from St. Louis to Helena that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisHelena
STL Lambert-St Louis - HLN Helena
STLHLN
Lambert-St Louis
Sat 2/6
9:13 am-1:27 pm
1 stop5h 14m
Helena
Tue 2/9
2:30 pm-8:59 pm
1 stop5h 29m
$429
St. LouisHelena
STL Lambert-St Louis - HLN Helena
STLHLN
Lambert-St Louis
Sat 9/26
4:49 pm-9:18 pm
1 stop5h 29m
Helena
Sat 10/3
2:30 pm-11:44 pm
1 stop8h 14m
$484
St. LouisHelena
STL Lambert-St Louis - HLN Helena
STLHLN
Lambert-St Louis
Tue 9/22
12:00 pm-10:24 pm
2 stops11h 24m
Helena
Sat 9/26
12:57 pm-9:31 pm
1 stop7h 34m
$499
Sorted by cheapest first
Compare providers for flights from St. Louis to Helena
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 Helena 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-Helena flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Helena flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Helena flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Helena 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-Helena 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 Helena
Have a flexible travel schedule? Discover the best time to fly to Helena from St. Louis with our price prediction graph.
STL-HLN
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.
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Helena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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