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$285+ Cheap flights from Helena to St. Louis (HLN - STL)

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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — STL
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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1. Tell us where you want to go

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Cheap flight deals from Helena to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to St. Louis (STL). 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 April 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$417
(United Airlines)

One-way from

$285
(United Airlines)
Provider with most accurate pricing for Helena-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Helena-Lambert-St Louis flights.
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From Helena to Lambert-St Louis
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One-way flight from Helena to Lambert-St Louis
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Find flight deals from Helena to St. Louis

Cheapest flights from Helena to St. Louis
Explore the most affordable flight options available from Helena to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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 5/315:39 pmHLN - STL
1 stop5h 20mUnited Airlines
Fri 6/64:32 pmSTL - HLN
1 stop5h 43mUnited Airlines
Deal found 4/29$417
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 6/184:09 pmHLN - STL
1 stop6h 50mAlaska Airlines
Tue 6/247:32 pmSTL - HLN
1 stop20h 59mAlaska Airlines
Deal found 4/28$536
This Delta deal was found by Cheapflights users on 4/29. 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 6/185:44 amHLN - STL
2 stops12h 00mDelta
Tue 6/243:57 pmSTL - HLN
2 stops8h 01mDelta
Deal found 4/29$678

Cheapflights Fare Finder

Customize your flight search to find flights from Helena to St. Louis 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 April 29, 2025.
Use the filters below to find and compare flights from Helena to St. Louis that are best for you.

Fly from

Helena

Fly to

St. Louis

Route

Depart

Return

Price

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 5/31

5:39 pm-11:59 pm

1 stop5h 20m

Lambert-St Louis

Fri 6/6

4:32 pm-9:15 pm

1 stop5h 43m

$417

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 6/18

4:09 pm-11:59 pm

1 stop6h 50m

Lambert-St Louis

Tue 6/24

7:32 pm-3:31 pm

1 stop20h 59m

$536

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 6/18

5:44 am-6:44 pm

2 stops12h 00m

Lambert-St Louis

Tue 6/24

3:57 pm-10:58 pm

2 stops8h 01m

$678

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Mon 6/23

2:39 pm-12:46 pm

1 stop21h 07m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Compare providers for flights from Helena to St. Louis

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 Helena to St. Louis in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 Helena-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Helena-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Helena-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Helena-St. Louis 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 Helena-St. Louis 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 Helena to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Helena 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 Helena to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Helena to St. Louis (average of $311). Flying from Helena to St. Louis in March is currently the most expensive (average of $356). 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated April 29, 2025.
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Helena to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Helena to St. Louis round-trip?

    United Airlines, at $417, was found to be the cheapest airline from Helena to St. Louis.Alternate airlines to your destination round-trip include Alaska Airlines and Delta.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Helena to St. Louis (average of $311). Flying from Helena to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near Helena?

Book flights to Helena if you plan to visit one of these locations
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
O'Fallon

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Top airline flying from Helena to St. Louis

Discover the top airline that operate flights from Helena to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$309Average$582FlexibilityNo cancel feeOn-timeN/A

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