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.

$145 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.

2:45 pm - 9:16 pm

STL

HLN

7h 31m

1 stop

2:25 pm - 8:26 pm

HLN

STL

5h 01m

1 stop

$289United Airlines

Wed, Feb 25 - Sat, Feb 28

4:30 pm - 9:16 pm

STL

HLN

5h 46m

1 stop

2:25 pm - 8:26 pm

HLN

STL

5h 01m

1 stop

$314United Airlines

Mon, Feb 23 - Sat, Feb 28

7:00 am - 9:16 pm

STL

HLN

15h 16m

2 stops

2:25 pm - 8:26 pm

HLN

STL

5h 01m

1 stop

$319United Airlines

Wed, Feb 25 - Sat, Feb 28

10:13 am - 10:27 pm

STL

HLN

13h 14m

2 stops

1:10 pm - 9:38 pm

HLN

STL

7h 28m

1 stop

$349Delta

Mon, Feb 23 - Sat, Feb 28

7:00 am - 9:16 pm

STL

HLN

15h 16m

2 stops

6:15 am - 4:02 pm

HLN

STL

8h 47m

2 stops

$464United Airlines

Wed, Feb 25 - Sat, Feb 28

5:12 am - 3:59 pm

STL

HLN

11h 47m

2 stops

4:36 pm - 8:55 am

HLN

STL

15h 19m

2 stops

$466Alaska Airlines

Wed, Feb 25 - Sat, Feb 28

8:30 am - 9:16 pm

STL

HLN

13h 46m

2 stops

6:15 am - 4:02 pm

HLN

STL

8h 47m

2 stops

$503United Airlines

Mon, Feb 23 - Sat, Feb 28

7:30 pm - 4:22 pm

STL

HLN

21h 52m

1 stop

4:59 pm - 2:02 pm

HLN

STL

20h 03m

1 stop

$509Alaska Airlines

Fri, Jul 17 - Fri, Jul 24

2:47 pm - 3:59 pm

STL

HLN

26h 12m

1 stop

4:36 pm - 11:59 pm

HLN

STL

6h 23m

1 stop

$549Alaska Airlines

Thu, Feb 12 - Mon, Feb 16

7:30 pm - 4:22 pm

STL

HLN

21h 52m

1 stop

4:59 pm - 2:02 pm

HLN

STL

20h 03m

1 stop

$552Alaska Airlines

Fri, Jul 17 - Fri, Jul 24

Alaska Airlines flights from St. Louis to Helena

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

Alaska Airlines

Feb 25

STL5:12 amLambert-St Louis

11h 47m

2 stops

HLN3:59 pmHelena

Feb 28

HLN4:36 pmHelena

15h 19m

2 stops

STL8:55 amLambert-St Louis

$466

Alaska Airlines

Jul 17

STL7:30 pmLambert-St Louis

21h 52m

1 stop

HLN4:22 pmHelena

Jul 24

HLN4:59 pmHelena

20h 03m

1 stop

STL2:02 pmLambert-St Louis

$509

Alaska Airlines

Feb 12

STL2:47 pmLambert-St Louis

26h 12m

1 stop

HLN3:59 pmHelena

Feb 16

HLN4:36 pmHelena

6h 23m

1 stop

STL11:59 pmLambert-St Louis

$549

Delta flights from St. Louis to Helena

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

Delta

Feb 23

STL10:13 amLambert-St Louis

13h 14m

2 stops

HLN10:27 pmHelena

Feb 28

HLN1:10 pmHelena

7h 28m

1 stop

STL9:38 pmLambert-St Louis

$349

Delta

Jul 17

STL7:30 amLambert-St Louis

5h 53m

1 stop

HLN12:23 pmHelena

Jul 24

HLN5:45 amHelena

6h 36m

1 stop

STL1:21 pmLambert-St Louis

$693

Delta

Feb 23

STL10:13 amLambert-St Louis

13h 14m

2 stops

HLN10:27 pmHelena

Feb 28

HLN1:10 pmHelena

9h 13m

2 stops

STL11:23 pmLambert-St Louis

$710

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/25

2:45 pm-9:16 pm

1 stop7h 31m

Helena

Sat 2/28

2:25 pm-8:26 pm

1 stop5h 01m

$289

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 2/23

4:30 pm-9:16 pm

1 stop5h 46m

Helena

Sat 2/28

2:25 pm-8:26 pm

1 stop5h 01m

$314

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/25

7:00 am-9:16 pm

2 stops15h 16m

Helena

Sat 2/28

2:25 pm-8:26 pm

1 stop5h 01m

$319

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 2/23

10:13 am-10:27 pm

2 stops13h 14m

Helena

Sat 2/28

1:10 pm-9:38 pm

1 stop7h 28m

$349

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/25

7:00 am-9:16 pm

2 stops15h 16m

Helena

Sat 2/28

6:15 am-4:02 pm

2 stops8h 47m

$464

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/25

5:12 am-3:59 pm

2 stops11h 47m

Helena

Sat 2/28

4:36 pm-8:55 am

2 stops15h 19m

$466

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 2/23

8:30 am-9:16 pm

2 stops13h 46m

Helena

Sat 2/28

6:15 am-4:02 pm

2 stops8h 47m

$503

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 7/17

7:30 pm-4:22 pm

1 stop21h 52m

Helena

Fri 7/24

4:59 pm-2:02 pm

1 stop20h 03m

$509

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Thu 2/12

2:47 pm-3:59 pm

1 stop26h 12m

Helena

Mon 2/16

4:36 pm-11:59 pm

1 stop6h 23m

$549

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 7/17

7:30 pm-4:22 pm

1 stop21h 52m

Helena

Fri 7/24

4:59 pm-2:02 pm

1 stop20h 03m

$552

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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?

Alaska Airlines is the most popular carrier 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 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 53m
Direct flights	None

The fastest flight from St. Louis to Helena takes 5h 53m

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 53m, 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.