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Helena

$329+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HLN
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
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Cheap flight deals from St. Louis to Helena

Cheapest flights from St. Louis to Helena
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 July 24, 2026.

This Delta deal was found by Cheapflights users on 7/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:00 am
STL
-
HLN
1 stop5h 15m
Delta
Tue 8/2512:55 pm
HLN
-
STL
1 stop5h 00m
Delta
Deal found 7/19$329
This Delta deal was found by Cheapflights users on 7/20. 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.
Tue 8/188:00 am
STL
-
HLN
1 stop5h 15m
Delta
Mon 8/245:40 am
HLN
-
STL
2 stops11h 13m
Delta
Deal found 7/20$334
This Delta deal was found by Cheapflights users on 7/22. 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 8/258:00 am
STL
-
HLN
1 stop5h 15m
Delta
Sat 8/296:50 am
HLN
-
STL
1 stop5h 48m
Delta
Deal found 7/22$339
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:00 am
STL
-
HLN
1 stop9h 31m
Alaska Airlines
Wed 12/94:08 pm
HLN
-
STL
1 stop6h 51m
Alaska Airlines
Deal found 7/21$354
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Tue 8/184:40 pm
STL
-
HLN
1 stop5h 50m
United Airlines
Mon 8/242:35 pm
HLN
-
STL
1 stop5h 11m
United Airlines
Deal found 7/20$360
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Sat 12/51:08 pm
STL
-
HLN
2 stops8h 51m
United Airlines
Wed 12/92:30 pm
HLN
-
STL
1 stop5h 29m
United Airlines
Deal found 7/20$424
This United Airlines deal was found by Cheapflights users on 7/19. 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.
Tue 8/1812:59 pm
STL
-
HLN
2 stops9h 31m
United Airlines
Tue 8/256:15 am
HLN
-
STL
2 stops11h 56m
United Airlines
Deal found 7/19$428

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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$329
(Delta)
Provider with most accurate pricing for Lambert-St Louis-Helena flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Helena flights.
Search Deals
From Lambert-St Louis to Helena
Search Deals

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 2,558,603 searches. Data last updated July 24, 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

Price

Cheapest round-trip
Quickest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/18

8:00 am-12:15 pm

1 stop5h 15m

Helena

Tue 8/25

12:55 pm-6:55 pm

1 stop5h 00m

$329

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/18

8:00 am-12:15 pm

1 stop5h 15m

Helena

Mon 8/24

5:40 am-5:53 pm

2 stops11h 13m

$334

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/25

4:40 pm-9:30 pm

1 stop5h 50m

Helena

Sat 8/29

6:15 am-12:40 pm

1 stop5h 25m

$339

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/25

8:00 am-12:15 pm

1 stop5h 15m

Helena

Sat 8/29

12:55 pm-11:31 pm

2 stops9h 36m

$344

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 12/5

7:00 am-3:31 pm

1 stop9h 31m

Helena

Wed 12/9

4:08 pm-11:59 pm

1 stop6h 51m

$354

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/18

4:40 pm-9:30 pm

1 stop5h 50m

Helena

Mon 8/24

2:35 pm-8:46 pm

1 stop5h 11m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

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 July.
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-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.
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.

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

    Airlines like Delta and United Airlines fly from St. Louis to Helena in about 5h 15m. The time it takes to get you to your destination can typically vary by up to 35m. St. Louis and Helena are separated by a distance of 1218 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Helena 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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