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.

$359 Cheap Flights from St. Louis to Helena in 2026/27

Find the cheapest flights from St. Louis to Helena

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:30 am - 12:24 pmSTL Lambert-St Louis-HLN Helena

5h 54m1 stop Salt Lake City

12:50 pm - 9:41 pmHLN Helena-STL Lambert-St Louis

7h 51m1 stop Salt Lake City

$359Delta

Fri, Feb 19 - Tue, Feb 23

7:30 am - 12:24 pmSTL Lambert-St Louis-HLN Helena

5h 54m1 stop Salt Lake City

12:50 pm - 11:18 pmHLN Helena-STL Lambert-St Louis

9h 28m2 stops Salt Lake City Minneapolis St Paul

$364Delta

Fri, Feb 19 - Tue, Feb 23

11:51 am - 10:41 pmSTL Lambert-St Louis-HLN Helena

11h 50m2 stops Atlanta Hartsfield-Jackson Salt Lake City

12:50 pm - 11:18 pmHLN Helena-STL Lambert-St Louis

9h 28m2 stops Salt Lake City Minneapolis St Paul

$399Delta

Fri, Feb 19 - Tue, Feb 23

3:00 pm - 8:59 pmSTL Lambert-St Louis-HLN Helena

6h 59m1 stop Denver Intl

7:00 am - 12:43 pmHLN Helena-STL Lambert-St Louis

4h 43m1 stop Denver Intl

$449United Airlines

Sat, Feb 6 - Tue, Feb 9

1:09 pm - 8:59 pmSTL Lambert-St Louis-HLN Helena

8h 50m2 stops Chicago O'Hare Intl Denver Intl

2:30 pm - 8:59 pmHLN Helena-STL Lambert-St Louis

5h 29m1 stop Denver Intl

$454United Airlines

Sat, Feb 6 - Tue, Feb 9

1:09 pm - 8:59 pmSTL Lambert-St Louis-HLN Helena

8h 50m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 9:53 pmHLN Helena-STL Lambert-St Louis

13h 53m2 stops Denver Intl Newark

$459United Airlines

Sat, Feb 6 - Tue, Feb 9

3:00 pm - 8:59 pmSTL Lambert-St Louis-HLN Helena

6h 59m1 stop Denver Intl

7:00 am - 12:43 pmHLN Helena-STL Lambert-St Louis

4h 43m1 stop Denver Intl

$469United Airlines

Sat, Feb 6 - Tue, Feb 9

1:09 pm - 8:59 pmSTL Lambert-St Louis-HLN Helena

8h 50m2 stops Chicago O'Hare Intl Denver Intl

2:30 pm - 8:59 pmHLN Helena-STL Lambert-St Louis

5h 29m1 stop Denver Intl

$474United Airlines

Sat, Feb 6 - Tue, Feb 9

1:09 pm - 8:59 pmSTL Lambert-St Louis-HLN Helena

8h 50m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 9:53 pmHLN Helena-STL Lambert-St Louis

13h 53m2 stops Denver Intl Newark

$479United Airlines

Sat, Feb 6 - Tue, Feb 9

3:54 pm - 4:23 pmSTL Lambert-St Louis-HLN Helena

25h 29m1 stop Seattle/Tacoma Intl

5:00 pm - 2:56 pmHLN Helena-STL Lambert-St Louis

20h 56m1 stop Seattle/Tacoma Intl

$491Alaska Airlines

Sat, Feb 6 - Tue, Feb 9

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United Airlines flights from St. Louis to Helena

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

United Airlines

Feb 6

STL3:00 pmLambert-St Louis

6h 59m

1 stop

HLN8:59 pmHelena

Feb 9

HLN7:00 amHelena

4h 43m

1 stop

STL12:43 pmLambert-St Louis

$449

United Airlines

Feb 6

STL1:09 pmLambert-St Louis

8h 50m

2 stops

HLN8:59 pmHelena

Feb 9

HLN2:30 pmHelena

5h 29m

1 stop

STL8:59 pmLambert-St Louis

$454

United Airlines

Feb 6

STL1:09 pmLambert-St Louis

8h 50m

2 stops

HLN8:59 pmHelena

Feb 9

HLN7:00 amHelena

13h 53m

2 stops

STL9:53 pmLambert-St Louis

$459

Delta flights from St. Louis to Helena

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

Delta

Feb 19

STL7:30 amLambert-St Louis

5h 54m

1 stop

HLN12:24 pmHelena

Feb 23

HLN12:50 pmHelena

7h 51m

1 stop

STL9:41 pmLambert-St Louis

$359

Delta

Feb 19

STL7:30 amLambert-St Louis

5h 54m

1 stop

HLN12:24 pmHelena

Feb 23

HLN12:50 pmHelena

9h 28m

2 stops

STL11:18 pmLambert-St Louis

$364

Delta

Feb 19

STL11:51 amLambert-St Louis

11h 50m

2 stops

HLN10:41 pmHelena

Feb 23

HLN12:50 pmHelena

9h 28m

2 stops

STL11:18 pmLambert-St Louis

$399

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Fri 2/19

7:30 am-12:24 pm

1 stop5h 54m

Helena

Tue 2/23

12:50 pm-9:41 pm

1 stop7h 51m

$359

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Fri 2/19

7:30 am-12:24 pm

1 stop5h 54m

Helena

Tue 2/23

12:50 pm-11:18 pm

2 stops9h 28m

$364

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Fri 2/19

11:51 am-10:41 pm

2 stops11h 50m

Helena

Tue 2/23

12:50 pm-11:18 pm

2 stops9h 28m

$399

Quickest round-trip

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Sat 2/6

3:00 pm-8:59 pm

1 stop6h 59m

Helena

Tue 2/9

7:00 am-12:43 pm

1 stop4h 43m

$449

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Sat 2/6

1:09 pm-8:59 pm

2 stops8h 50m

Helena

Tue 2/9

2:30 pm-8:59 pm

1 stop5h 29m

$454

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Sat 2/6

1:09 pm-8:59 pm

2 stops8h 50m

Helena

Tue 2/9

7:00 am-9:53 pm

2 stops13h 53m

$459

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Sat 2/6

3:00 pm-8:59 pm

1 stop6h 59m

Helena

Tue 2/9

7:00 am-12:43 pm

1 stop4h 43m

$469

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Sat 2/6

1:09 pm-8:59 pm

2 stops8h 50m

Helena

Tue 2/9

2:30 pm-8:59 pm

1 stop5h 29m

$474

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Sat 2/6

1:09 pm-8:59 pm

2 stops8h 50m

Helena

Tue 2/9

7:00 am-9:53 pm

2 stops13h 53m

$479

St. LouisHelena

STL Lambert-St Louis - HLN Helena

STLHLN

Lambert-St Louis

Sat 2/6

3:54 pm-4:23 pm

1 stop25h 29m

Helena

Tue 2/9

5:00 pm-2:56 pm

1 stop20h 56m

$491

Flights are sorted by cheapest round-trip flights first.

Sorted 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 airlines fly to Helena?

United Airlines, Delta and Southwest 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 50% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 4 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

Best Price Found	$359
Fastest flight time	5h 39m
Direct flights	None

The best flight deal from St. Louis to Helena found on momondo in the last 72 hours is $359

The fastest flight from St. Louis to Helena takes 5h 39m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Helena

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 39m, 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.