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

Airlines like United Airlines and Alaska Airlines fly from St. Louis to Helena in about 8h 20m. The time it takes to get you to your destination can typically vary by up to 24h 38m. 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.

What is the cheapest day to fly from St. Louis to Helena?

Travelers seeking maximum savings on their St. Louis to Helena flight should consider departing on Tuesday mornings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Helena ranges from 0.3 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Helena when rainfall is around 0.3 in.

If weather is an important factor for your trip to Helena, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 21.2 F).

What is the cheapest day to fly round-trip from St. Louis to Helena?

Users have found that flying from St. Louis to Helena on a Wednesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest time of day to fly from STL to HLN?

It’s typically best to fly out from St. Louis to Helena in the morning. Doing so could potentially save you 40% on the flight price compared to flying at noon, which is usually more expensive.

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.

$399+ Cheap Flights from St. Louis to Helena

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Cheap flight deals from St. Louis to Helena

Round-trip from	$399 (United Airlines)

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 septiembre 11, 2025.

mié. 10/151:40 pmSTL - HLN

1 stop8h 20mUnited Airlines

dom. 10/195:18 pmHLN - STL

1 stop5h 40mUnited Airlines

Deal found 9/10

$399

mié. 10/159:43 amSTL - HLN

2 stops32h 58mAlaska Airlines

dom. 10/196:18 pmHLN - STL

2 stops28h 31mAlaska Airlines

Deal found 9/10

$716

Best flights from St. Louis to Helena
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 septiembre 11, 2025.

mié. 10/151:40 pmSTL - HLN

1 stop8h 20mUnited Airlines

dom. 10/195:18 pmHLN - STL

1 stop5h 40mUnited Airlines

Deal found 9/10

$399

mié. 10/159:43 amSTL - HLN

2 stops32h 58mAlaska Airlines

dom. 10/196:18 pmHLN - STL

2 stops28h 31mAlaska Airlines

Deal found 9/10

$716

Last-minute flights from St. Louis to Helena
Discover last-minute flight deals from St. Louis to Helena. Data last updated septiembre 11, 2025 and is based on user searches.

mié. 10/151:40 pmSTL - HLN

1 stop8h 20mUnited Airlines

dom. 10/195:18 pmHLN - STL

1 stop5h 40mUnited Airlines

Deal found 9/10

$399

mié. 10/159:43 amSTL - HLN

2 stops32h 58mAlaska Airlines

dom. 10/196:18 pmHLN - STL

2 stops28h 31mAlaska Airlines

Deal found 9/10

$716

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

mié. 10/15

1:40 pm-9:00 pm

1 stop8h 20m

Helena

dom. 10/19

5:18 pm-11:58 pm

1 stop5h 40m

$399

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

mié. 10/15

9:43 am-5:41 pm

2 stops32h 58m

Helena

dom. 10/19

6:18 pm-11:49 pm

2 stops28h 31m

$716

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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, February is the cheapest month in which you can book a flight from St. Louis to Helena (average of $353). Flying from St. Louis to Helena in May is currently the most expensive (average of $517). 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

How long is the flight from St. Louis to Helena?
Airlines like United Airlines and Alaska Airlines fly from St. Louis to Helena in about 8h 20m. The time it takes to get you to your destination can typically vary by up to 24h 38m. 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, February is the cheapest month in which you can book a flight from St. Louis to Helena (average of $353). Flying from St. Louis to Helena in May is currently the most expensive (average of $517). 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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$399+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from St. Louis to Helena

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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 septiembre 11, 2025.

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 septiembre 11, 2025.

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

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.

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?

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?

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

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

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

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

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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 septiembre 11, 2025.