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Helena

$210+ Cheap flights from St. Louis to Helena (STL - HLN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HLN
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
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 January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/26. 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 2/252:45 pm
STL
-
HLN
1 stop7h 31m
United Airlines
Sat 2/282:25 pm
HLN
-
STL
1 stop5h 01m
United Airlines
Deal found 1/26$289
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/104:15 pm
STL
-
HLN
1 stop6h 11m
United Airlines
Sat 2/142:25 pm
HLN
-
STL
1 stop5h 01m
United Airlines
Deal found 1/26$339
This Delta deal was found by Cheapflights users on 1/26. 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 2/106:40 am
STL
-
HLN
1 stop6h 47m
Delta
Sat 2/141:10 pm
HLN
-
STL
2 stops9h 13m
Delta
Deal found 1/26$344
This Alaska Airlines deal was found by Cheapflights users on 1/25. 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.
Thu 2/192:47 pm
STL
-
HLN
1 stop26h 12m
Alaska Airlines
Sun 2/224:36 pm
HLN
-
STL
1 stop20h 15m
Alaska Airlines
Deal found 1/25$426
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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 2/255:12 am
STL
-
HLN
2 stops11h 47m
Alaska Airlines
Sat 2/284:36 pm
HLN
-
STL
2 stops15h 19m
Alaska Airlines
Deal found 1/26$466
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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.
Thu 5/147:56 pm
STL
-
HLN
1 stop21h 10m
Alaska Airlines
Sun 5/174:43 pm
HLN
-
STL
1 stop22h 07m
Alaska Airlines
Deal found 1/26$493
This United Airlines deal was found by Cheapflights users on 1/25. 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 2/197:00 am
STL
-
HLN
2 stops15h 16m
United Airlines
Sun 2/222:25 pm
HLN
-
STL
1 stop5h 01m
United Airlines
Deal found 1/25$503

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(United Airlines)

One-way from

$210
(Expedia)
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
One-way flight 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 January 27, 2026.
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 2/25

2:45 pm-9:16 pm

1 stop7h 31m

Helena

Sat 2/28

2:25 pm-8:26 pm

1 stop5h 01m

$289

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 2/10

4:15 pm-9:26 pm

1 stop6h 11m

Helena

Sat 2/14

2:25 pm-8:26 pm

1 stop5h 01m

$339

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 2/10

6:40 am-12:27 pm

1 stop6h 47m

Helena

Sat 2/14

1:10 pm-11:23 pm

2 stops9h 13m

$344

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 2/19

2:47 pm-3:59 pm

1 stop26h 12m

Helena

Sun 2/22

4:36 pm-1:51 pm

1 stop20h 15m

$426

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/25

5:12 am-3:59 pm

2 stops11h 47m

Helena

Sat 2/28

4:36 pm-8:55 am

2 stops15h 19m

$466

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/4

2:50 pm-6:11 pm

1 stop28h 21m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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 January.
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.

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, January is the cheapest month in which you can book a flight from St. Louis to Helena (average of $192). Flying from St. Louis to Helena in April is currently the most expensive (average of $336). 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 United Airlines fly from St. Louis to Helena in about 7h 31m. The time it takes to get you to your destination can typically vary by up to . St. Louis and Helena are separated by a distance of 1218 mi.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Helena (average of $192). Flying from St. Louis to Helena in April is currently the most expensive (average of $336). 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.

See more FAQs

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