HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Helena

$349+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HLN
May 26 — Jun 21
Tue 5/26
Tue 6/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Helena with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 26, 2026.

This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:00 am
STL
-
HLN
1 stop9h 31m
Alaska Airlines
Wed 11/114:08 pm
HLN
-
STL
1 stop6h 51m
Alaska Airlines
Deal found 4/22$349
This Delta deal was found by Cheapflights users on 4/23. 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.
Fri 5/87:00 am
STL
-
HLN
1 stop6h 23m
Delta
Tue 5/121:03 pm
HLN
-
STL
1 stop5h 00m
Delta
Deal found 4/23$399
This United Airlines deal was found by Cheapflights users on 4/24. 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 6/234:48 pm
STL
-
HLN
1 stop5h 32m
United Airlines
Wed 7/12:20 pm
HLN
-
STL
1 stop5h 23m
United Airlines
Deal found 4/24$461
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Tue 7/79:23 am
STL
-
HLN
2 stops12h 57m
United Airlines
Sat 7/112:20 pm
HLN
-
STL
1 stop5h 23m
United Airlines
Deal found 4/25$576
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Fri 6/194:48 pm
STL
-
HLN
1 stop5h 32m
United Airlines
Mon 6/222:20 pm
HLN
-
STL
1 stop5h 23m
United Airlines
Deal found 4/25$582
This Delta deal was found by Cheapflights users on 4/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/208:00 am
STL
-
HLN
1 stop5h 20m
Delta
Mon 7/61:00 pm
HLN
-
STL
1 stop10h 39m
Delta
Deal found 4/21$613
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/172:35 pm
STL
-
HLN
2 stops26h 57m
Alaska Airlines
Fri 7/245:09 pm
HLN
-
STL
2 stops14h 38m
Alaska Airlines
Deal found 4/22$623
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Fri 5/82:37 pm
STL
-
HLN
2 stops28h 08m
Alaska Airlines
Tue 5/126:22 pm
HLN
-
STL
2 stops13h 32m
Alaska Airlines
Deal found 4/23$656

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 April 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$399
(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 April 26, 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

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 5/8

7:00 am-12:23 pm

1 stop6h 23m

Helena

Tue 5/12

1:03 pm-7:03 pm

1 stop5h 00m

$399
Quickest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 6/23

4:48 pm-9:20 pm

1 stop5h 32m

Helena

Wed 7/1

2:20 pm-8:43 pm

1 stop5h 23m

$461

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 7/7

9:23 am-9:20 pm

2 stops12h 57m

Helena

Sat 7/11

2:20 pm-8:43 pm

1 stop5h 23m

$576

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 6/19

4:48 pm-9:20 pm

1 stop5h 32m

Helena

Mon 6/22

2:20 pm-8:43 pm

1 stop5h 23m

$582

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 6/20

8:00 am-12:20 pm

1 stop5h 20m

Helena

Mon 7/6

1:00 pm-12:39 am

1 stop10h 39m

$613

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 7/17

2:35 pm-4:32 pm

2 stops26h 57m

Helena

Fri 7/24

5:09 pm-8:47 am

2 stops14h 38m

$623

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 5/8

2:37 pm-5:45 pm

2 stops28h 08m

Helena

Tue 5/12

6:22 pm-8:54 am

2 stops13h 32m

$656

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 6/23

8:00 am-12:20 pm

1 stop5h 20m

Helena

Wed 7/1

5:25 am-3:16 pm

2 stops8h 51m

$669

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 5/9

6:30 am-1:38 pm

2 stops8h 08m

Helena

Wed 5/13

6:15 am-1:13 pm

1 stop5h 58m

$673

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 7/7

7:56 pm-4:32 pm

1 stop21h 36m

Helena

Sat 7/11

5:09 pm-1:52 pm

1 stop19h 43m

$683

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

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 April.
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 32m. The time it takes to get you to your destination can typically vary by up to 51m. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights