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

Delta, United Airlines, and Alaska Airlines are the most popular carriers operating from Lambert-St Louis to Helena

What airlines fly to Helena?

United Airlines, American Airlines and Delta 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 36% 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 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.

$170 Cheap Flights from St. Louis to Helena in 2025/26

1 adult

0 bags

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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.

6:15 am - 12:25 pmSTL-HLN

7h 10m1 stop

5:30 am - 1:30 pmHLN-STL

7h 00m1 stop

$349Delta

Find Deal

Thu, Dec 4 - Wed, Dec 10

6:15 am - 12:25 pmSTL-HLN

7h 10m1 stop

5:30 am - 5:10 pmHLN-STL

10h 40m2 stops

$354Delta

Find Deal

Thu, Dec 4 - Wed, Dec 10

11:40 am - 10:30 pmSTL-HLN

11h 50m2 stops

5:30 am - 5:10 pmHLN-STL

10h 40m2 stops

$454Delta

Find Deal

Thu, Dec 4 - Wed, Dec 10

7:00 am - 5:36 pmSTL-HLN

11h 36m1 stop

6:13 pm - 11:59 pmHLN-STL

28h 46m1 stop

$465Alaska Airlines

Find Deal

Mon, Nov 10 - Wed, Nov 12

6:34 am - 12:26 pmSTL-HLN

6h 52m1 stop

1:06 pm - 11:23 pmHLN-STL

9h 17m2 stops

$519Delta

Find Deal

Mon, Nov 10 - Wed, Nov 12

8:25 am - 9:22 pmSTL-HLN

13h 57m2 stops

6:40 am - 3:47 pmHLN-STL

8h 07m2 stops

$619United Airlines

Find Deal

Mon, Nov 3 - Tue, Nov 4

4:55 pm - 9:22 pmSTL-HLN

5h 27m1 stop

2:22 pm - 3:46 pmHLN-STL

24h 24m2 stops

$631United Airlines

Find Deal

Tue, Nov 18 - Tue, Nov 25

4:55 pm - 9:22 pmSTL-HLN

5h 27m1 stop

2:22 pm - 9:54 pmHLN-STL

6h 32m1 stop

$635United Airlines

Find Deal

Tue, Nov 18 - Tue, Nov 25

5:17 am - 5:55 pmSTL-HLN

13h 38m2 stops

6:32 pm - 4:23 pmHLN-STL

20h 51m2 stops

$842Alaska Airlines

Find Deal

Thu, Dec 18 - Sat, Dec 27

5:17 am - 5:55 pmSTL-HLN

13h 38m2 stops

6:32 pm - 7:31 pmHLN-STL

23h 59m2 stops

$886Alaska Airlines

Find Deal

Thu, Dec 18 - Sat, Dec 27

Delta flights from St. Louis to Helena

Our best Delta deals on St. Louis to Helena flight tickets

Delta

Dec 4

STL6:15 amLambert-St Louis

7h 10m

1 stop

HLN12:25 pmHelena

Dec 10

HLN5:30 amHelena

7h 00m

1 stop

STL1:30 pmLambert-St Louis

$349

Find similar

Delta

Dec 4

STL6:15 amLambert-St Louis

7h 10m

1 stop

HLN12:25 pmHelena

Dec 10

HLN5:30 amHelena

10h 40m

2 stops

STL5:10 pmLambert-St Louis

$354

Find similar

Delta

Dec 4

STL11:40 amLambert-St Louis

11h 50m

2 stops

HLN10:30 pmHelena

Dec 10

HLN5:30 amHelena

10h 40m

2 stops

STL5:10 pmLambert-St Louis

$454

Find similar

Alaska Airlines flights from St. Louis to Helena

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

Alaska Airlines

Nov 10

STL7:00 amLambert-St Louis

11h 36m

1 stop

HLN5:36 pmHelena

Nov 12

HLN6:13 pmHelena

28h 46m

1 stop

STL11:59 pmLambert-St Louis

$465

Find similar

Alaska Airlines

Dec 18

STL5:17 amLambert-St Louis

13h 38m

2 stops

HLN5:55 pmHelena

Dec 27

HLN6:32 pmHelena

20h 51m

2 stops

STL4:23 pmLambert-St Louis

$842

Find similar

Alaska Airlines

Dec 18

STL5:17 amLambert-St Louis

13h 38m

2 stops

HLN5:55 pmHelena

Dec 27

HLN6:32 pmHelena

23h 59m

2 stops

STL7:31 pmLambert-St Louis

$886

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 12/4

6:15 am-12:25 pm

1 stop7h 10m

Helena

Wed 12/10

5:30 am-1:30 pm

1 stop7h 00m

$349

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 12/4

6:15 am-12:25 pm

1 stop7h 10m

Helena

Wed 12/10

5:30 am-5:10 pm

2 stops10h 40m

$354

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 12/4

11:40 am-10:30 pm

2 stops11h 50m

Helena

Wed 12/10

5:30 am-5:10 pm

2 stops10h 40m

$454

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 11/10

7:00 am-5:36 pm

1 stop11h 36m

Helena

Wed 11/12

6:13 pm-11:59 pm

1 stop28h 46m

$465

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 11/10

6:34 am-12:26 pm

1 stop6h 52m

Helena

Wed 11/12

1:06 pm-11:23 pm

2 stops9h 17m

$519

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 11/3

8:25 am-9:22 pm

2 stops13h 57m

Helena

Tue 11/4

6:40 am-3:47 pm

2 stops8h 07m

$619

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 11/18

4:55 pm-9:22 pm

1 stop5h 27m

Helena

Tue 11/25

2:22 pm-3:46 pm

2 stops24h 24m

$631

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 11/18

4:55 pm-9:22 pm

1 stop5h 27m

Helena

Tue 11/25

2:22 pm-9:54 pm

1 stop6h 32m

$635

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 12/18

5:17 am-5:55 pm

2 stops13h 38m

Helena

Sat 12/27

6:32 pm-4:23 pm

2 stops20h 51m

$842

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 12/18

5:17 am-5:55 pm

2 stops13h 38m

Helena

Sat 12/27

6:32 pm-7:31 pm

2 stops23h 59m

$886

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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

Prices

Airlines

What is the cheapest day to depart on your flight to Helena?

The cheapest day to depart from St. Louis to Helena is on a Tuesday. Travelers who choose to depart for Helena on a Tuesday will often find tickets for as low as $448. The most expensive day to fly to Helena is Thursday, with ticket prices averaging around $760.

What is the cheapest time of day to depart on your flight to Helena?

According to our data, the cheapest time of day to fly to Helena is in the morning. momondo users have found flights departing from St. Louis to Helena in the morning for as low as $538. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is in the afternoon when prices are around $888.

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

Direct flights	None

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

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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 27m, 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.