When did momondo last update prices for flights from Lambert-St Louis Airport to Helena Airport?

Prices for flights from Lambert-St Louis Airport to Helena Airport are refreshed on a daily basis.

How old do you have to be to fly from Lambert-St Louis Airport to Helena Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Helena Airport.

What documentation or ID do you need to fly to Helena Airport?

The necessary travel and health documents for your Helena Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$175 Cheap Flights from St. Louis to Helena in 2026

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Find the cheapest flights from St. Louis to Helena

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:54 am - 1:39 pm

STL

HLN

5h 45m

1 stop

2:25 pm - 8:54 pm

HLN

STL

5h 29m

1 stop

$470United Airlines

Mon, Apr 13 - Tue, Apr 21

7:00 am - 12:24 pm

STL

HLN

6h 24m

1 stop

1:04 pm - 11:13 pm

HLN

STL

9h 09m

2 stops

$499Delta

Mon, Apr 13 - Tue, Apr 21

7:56 pm - 4:49 pm

STL

HLN

21h 53m

1 stop

5:26 pm - 11:08 pm

HLN

STL

28h 42m

2 stops

$509Alaska Airlines

Mon, Aug 3 - Sat, Aug 15

2:33 pm - 5:45 pm

STL

HLN

28h 12m

2 stops

6:22 pm - 11:47 am

HLN

STL

16h 25m

2 stops

$593Alaska Airlines

Mon, Apr 13 - Tue, Apr 21

7:56 pm - 4:49 pm

STL

HLN

21h 53m

1 stop

5:26 pm - 1:55 pm

HLN

STL

19h 29m

1 stop

$619Alaska Airlines

Sun, Jun 14 - Wed, Jun 17

2:35 pm - 4:49 pm

STL

HLN

27h 14m

2 stops

5:26 pm - 11:59 pm

HLN

STL

29h 33m

2 stops

$623Alaska Airlines

Fri, Jul 17 - Fri, Jul 24

7:56 pm - 4:49 pm

STL

HLN

21h 53m

1 stop

5:26 pm - 8:51 am

HLN

STL

14h 25m

2 stops

$644Alaska Airlines

Sun, Jun 14 - Wed, Jun 17

4:45 pm - 9:20 pm

STL

HLN

5h 35m

1 stop

2:20 pm - 8:43 pm

HLN

STL

5h 23m

1 stop

$662United Airlines

Sat, Jun 13 - Thu, Jun 18

2:53 pm - 4:49 pm

STL

HLN

26h 56m

1 stop

5:26 pm - 11:59 pm

HLN

STL

29h 33m

2 stops

$688Alaska Airlines

Fri, Jul 17 - Fri, Jul 24

9:23 am - 9:20 pm

STL

HLN

12h 57m

2 stops

2:20 pm - 8:43 pm

HLN

STL

5h 23m

1 stop

$708United Airlines

Sat, Jun 13 - Thu, Jun 18

United Airlines flights from St. Louis to Helena

Our best United Airlines deals on St. Louis to Helena flight tickets

United Airlines

Apr 13

STL8:54 amLambert-St Louis

5h 45m

1 stop

HLN1:39 pmHelena

Apr 21

HLN2:25 pmHelena

5h 29m

1 stop

STL8:54 pmLambert-St Louis

$470

United Airlines

Jun 13

STL4:45 pmLambert-St Louis

5h 35m

1 stop

HLN9:20 pmHelena

Jun 18

HLN2:20 pmHelena

5h 23m

1 stop

STL8:43 pmLambert-St Louis

$662

United Airlines

Jun 13

STL9:23 amLambert-St Louis

12h 57m

2 stops

HLN9:20 pmHelena

Jun 18

HLN2:20 pmHelena

5h 23m

1 stop

STL8:43 pmLambert-St Louis

$708

Alaska Airlines flights from St. Louis to Helena

Our best Alaska Airlines deals on St. Louis to Helena flight tickets

Alaska Airlines

Aug 3

STL7:56 pmLambert-St Louis

21h 53m

1 stop

HLN4:49 pmHelena

Aug 15

HLN5:26 pmHelena

28h 42m

2 stops

STL11:08 pmLambert-St Louis

$509

Alaska Airlines

Apr 13

STL2:33 pmLambert-St Louis

28h 12m

2 stops

HLN5:45 pmHelena

Apr 21

HLN6:22 pmHelena

16h 25m

2 stops

STL11:47 amLambert-St Louis

$593

Alaska Airlines

Jun 14

STL7:56 pmLambert-St Louis

21h 53m

1 stop

HLN4:49 pmHelena

Jun 17

HLN5:26 pmHelena

19h 29m

1 stop

STL1:55 pmLambert-St Louis

$619

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 4/13

8:54 am-1:39 pm

1 stop5h 45m

Helena

Tue 4/21

2:25 pm-8:54 pm

1 stop5h 29m

$470

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 4/13

7:00 am-12:24 pm

1 stop6h 24m

Helena

Tue 4/21

1:04 pm-11:13 pm

2 stops9h 09m

$499

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 8/3

7:56 pm-4:49 pm

1 stop21h 53m

Helena

Sat 8/15

5:26 pm-11:08 pm

2 stops28h 42m

$509

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 4/13

2:33 pm-5:45 pm

2 stops28h 12m

Helena

Tue 4/21

6:22 pm-11:47 am

2 stops16h 25m

$593

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sun 6/14

7:56 pm-4:49 pm

1 stop21h 53m

Helena

Wed 6/17

5:26 pm-1:55 pm

1 stop19h 29m

$619

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 7/17

2:35 pm-4:49 pm

2 stops27h 14m

Helena

Fri 7/24

5:26 pm-11:59 pm

2 stops29h 33m

$623

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sun 6/14

7:56 pm-4:49 pm

1 stop21h 53m

Helena

Wed 6/17

5:26 pm-8:51 am

2 stops14h 25m

$644

Quickest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 6/13

4:45 pm-9:20 pm

1 stop5h 35m

Helena

Thu 6/18

2:20 pm-8:43 pm

1 stop5h 23m

$662

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 7/17

2:53 pm-4:49 pm

1 stop26h 56m

Helena

Fri 7/24

5:26 pm-11:59 pm

2 stops29h 33m

$688

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 6/13

9:23 am-9:20 pm

2 stops12h 57m

Helena

Thu 6/18

2:20 pm-8:43 pm

1 stop5h 23m

$708

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Helena

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to Helena?

United Airlines is the most popular carrier operating from Lambert-St Louis to Helena

What airlines fly to Helena?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Helena from St. Louis according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 5 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

When to book flights from St. Louis to Helena

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Helena according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Helena (STL to HLN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Helena

Fastest flight time	5h 32m
Direct flights	None

The fastest flight from St. Louis to Helena takes 5h 32m

There are no direct flights from St. Louis to Helena. There are no popular flight routes from St. Louis to Helena.

Search flight deals

How far is Lambert-St Louis to Helena by plane?
The distance between Lambert-St Louis and Helena is about 1232.9 mi. Flights usually cover this in 5h 32m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Helena Airport?
Prices for flights from Lambert-St Louis Airport to Helena Airport are refreshed on a daily basis.
How old do you have to be to fly from Lambert-St Louis Airport to Helena Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Helena Airport.
What documentation or ID do you need to fly to Helena Airport?
The necessary travel and health documents for your Helena Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Helena?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Helena for you.

Can I find flights from St. Louis to Helena with flexible booking policies on momondo?

momondo does allow users to show only those flights to Helena from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Helena?

Once all potential St. Louis to Helena flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Helena right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Helena from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.