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.

$215 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.

8:00 am - 12:15 pm

STL

HLN

5h 15m

1 stop

12:55 pm - 9:00 pm

HLN

STL

7h 05m

1 stop

$394Delta

Tue, Aug 11 - Sat, Aug 22

4:30 pm - 8:59 pm

STL

HLN

5h 29m

1 stop

2:30 pm - 8:59 pm

HLN

STL

5h 29m

1 stop

$419United Airlines

Sat, Nov 14 - Tue, Nov 17

4:30 pm - 8:59 pm

STL

HLN

5h 29m

1 stop

2:30 pm - 12:34 am

HLN

STL

9h 04m

2 stops

$424United Airlines

Sat, Nov 14 - Tue, Nov 17

9:23 am - 8:59 pm

STL

HLN

12h 36m

2 stops

2:30 pm - 12:34 am

HLN

STL

9h 04m

2 stops

$429United Airlines

Sat, Nov 14 - Tue, Nov 17

7:00 am - 4:04 pm

STL

HLN

10h 04m

1 stop

4:41 pm - 2:15 pm

HLN

STL

20h 34m

1 stop

$451Alaska Airlines

Sat, Nov 14 - Tue, Nov 17

6:20 am - 10:30 pm

STL

HLN

17h 10m

2 stops

12:55 pm - 6:55 pm

HLN

STL

5h 00m

1 stop

$452Delta

Fri, Aug 14 - Thu, Aug 20

8:00 am - 12:15 pm

STL

HLN

5h 15m

1 stop

12:55 pm - 6:55 pm

HLN

STL

5h 00m

1 stop

$459Delta

Tue, Aug 11 - Fri, Aug 21

6:00 am - 10:30 pm

STL

HLN

17h 30m

2 stops

12:55 pm - 6:55 pm

HLN

STL

5h 00m

1 stop

$477Delta

Tue, Aug 11 - Thu, Aug 20

4:48 pm - 9:20 pm

STL

HLN

5h 32m

1 stop

2:35 pm - 8:46 pm

HLN

STL

5h 11m

1 stop

$479United Airlines

Mon, Aug 10 - Thu, Aug 20

8:00 am - 12:15 pm

STL

HLN

5h 15m

1 stop

5:40 am - 1:34 pm

HLN

STL

6h 54m

1 stop

$489Delta

Tue, Aug 11 - Mon, Aug 24

United Airlines flights from St. Louis to Helena

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

United Airlines

Nov 14

STL4:30 pmLambert-St Louis

5h 29m

1 stop

HLN8:59 pmHelena

Nov 17

HLN2:30 pmHelena

5h 29m

1 stop

STL8:59 pmLambert-St Louis

$419

United Airlines

Nov 14

STL4:30 pmLambert-St Louis

5h 29m

1 stop

HLN8:59 pmHelena

Nov 17

HLN2:30 pmHelena

9h 04m

2 stops

STL12:34 amLambert-St Louis

$424

United Airlines

Nov 14

STL9:23 amLambert-St Louis

12h 36m

2 stops

HLN8:59 pmHelena

Nov 17

HLN2:30 pmHelena

9h 04m

2 stops

STL12:34 amLambert-St Louis

$429

Alaska Airlines flights from St. Louis to Helena

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

Alaska Airlines

Nov 14

STL7:00 amLambert-St Louis

10h 04m

1 stop

HLN4:04 pmHelena

Nov 17

HLN4:41 pmHelena

20h 34m

1 stop

STL2:15 pmLambert-St Louis

$451

Alaska Airlines

Jun 29

STL7:56 pmLambert-St Louis

21h 36m

1 stop

HLN4:32 pmHelena

Jul 6

HLN5:09 pmHelena

29h 50m

2 stops

STL11:59 pmLambert-St Louis

$608

Alaska Airlines

Aug 11

STL5:37 pmLambert-St Louis

23h 55m

2 stops

HLN4:32 pmHelena

Aug 24

HLN5:11 pmHelena

22h 59m

2 stops

STL5:10 pmLambert-St Louis

$653

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/11

8:00 am-12:15 pm

1 stop5h 15m

Helena

Sat 8/22

12:55 pm-9:00 pm

1 stop7h 05m

$394

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 11/14

4:30 pm-8:59 pm

1 stop5h 29m

Helena

Tue 11/17

2:30 pm-8:59 pm

1 stop5h 29m

$419

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 11/14

4:30 pm-8:59 pm

1 stop5h 29m

Helena

Tue 11/17

2:30 pm-12:34 am

2 stops9h 04m

$424

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 11/14

9:23 am-8:59 pm

2 stops12h 36m

Helena

Tue 11/17

2:30 pm-12:34 am

2 stops9h 04m

$429

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 11/14

7:00 am-4:04 pm

1 stop10h 04m

Helena

Tue 11/17

4:41 pm-2:15 pm

1 stop20h 34m

$451

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 8/14

6:20 am-10:30 pm

2 stops17h 10m

Helena

Thu 8/20

12:55 pm-6:55 pm

1 stop5h 00m

$452

Quickest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/11

8:00 am-12:15 pm

1 stop5h 15m

Helena

Fri 8/21

12:55 pm-6:55 pm

1 stop5h 00m

$459

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/11

6:00 am-10:30 pm

2 stops17h 30m

Helena

Thu 8/20

12:55 pm-6:55 pm

1 stop5h 00m

$477

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 8/10

4:48 pm-9:20 pm

1 stop5h 32m

Helena

Thu 8/20

2:35 pm-8:46 pm

1 stop5h 11m

$479

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/11

8:00 am-12:15 pm

1 stop5h 15m

Helena

Mon 8/24

5:40 am-1:34 pm

1 stop6h 54m

$489

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, Delta, and United Airlines are the most popular carriers 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 49% 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

Fastest flight time	5h 15m
Direct flights	None

The fastest flight from St. Louis to Helena takes 5h 15m

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 15m, 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.