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Helena

$549+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HLN
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$476
(Alaska Airlines)
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
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Find 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 October 28, 2025.

This Delta deal was found by Cheapflights users on 10/27. 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.
Wed 11/126:34 amSTL - HLN
1 stop6h 52mDelta
Sun 11/165:30 amHLN - STL
1 stop7h 01mDelta
Deal found 10/27$549
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/244:43 pmSTL - HLN
1 stop5h 39mUnited Airlines
Mon 12/12:22 pmHLN - STL
1 stop6h 32mUnited Airlines
Deal found 10/27$648
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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.
Mon 11/247:00 amSTL - HLN
1 stop12h 52mAlaska Airlines
Mon 12/17:32 pmHLN - STL
2 stops27h 10mAlaska Airlines
Deal found 10/27$700
This United Airlines deal was found by Cheapflights users on 10/27. 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 12/182:45 pmSTL - HLN
1 stop7h 46mUnited Airlines
Sun 12/282:26 pmHLN - STL
1 stop6h 56mUnited Airlines
Deal found 10/27$713
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/1210:00 amSTL - HLN
2 stops12h 22mUnited Airlines
Sun 11/166:40 amHLN - STL
3 stops56h 07mUnited Airlines
Deal found 10/27$881

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 October 28, 2025.
Use the filters below to find and compare flights from St. Louis to Helena that are best for you.

Fly from

St. Louis

Fly to

Helena

Route

Depart

Return

Price

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 11/12

6:34 am-12:26 pm

1 stop6h 52m

Helena

Sun 11/16

5:30 am-1:31 pm

1 stop7h 01m

$549

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 11/24

4:43 pm-9:22 pm

1 stop5h 39m

Helena

Mon 12/1

2:22 pm-9:54 pm

1 stop6h 32m

$648

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 11/24

7:00 am-6:52 pm

1 stop12h 52m

Helena

Mon 12/1

7:32 pm-11:42 pm

2 stops27h 10m

$700

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 12/18

2:45 pm-9:31 pm

1 stop7h 46m

Helena

Sun 12/28

2:26 pm-10:22 pm

1 stop6h 56m

$713

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 11/12

10:00 am-9:22 pm

2 stops12h 22m

Helena

Sun 11/16

6:40 am-3:47 pm

3 stops56h 07m

$881

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Helena flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Helena

What is the cheapest month to book a flight from St. Louis to Helena?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Helena (average of $207). Flying from St. Louis to Helena in February is currently the most expensive (average of $342). 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.

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, United Airlines, and Alaska Airlines fly from St. Louis to Helena in about 5h 39m. The time it takes to get you to your destination can typically vary by up to 7h 13m. 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.

  • What is the cheapest month to book a flight from St. Louis to Helena?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Helena (average of $207). Flying from St. Louis to Helena in February is currently the most expensive (average of $342). 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.

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