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

Prices for flights from Helena Airport to Lambert-St Louis Airport refresh daily.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Helena Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$150 Cheap Flights from Helena to St. Louis in 2026

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0 bags

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Find the cheapest flights from Helena to St. Louis

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HLN

STL

1218 mimulti-stop

STL

HLN

1218 mimulti-stop

Multiple Airlines

United Airlines flights from Helena to St. Louis

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

United Airlines

Jan 31

HLN2:27 pmHelena

5h 31m

1 stop

STL8:58 pmLambert-St Louis

Feb 3

STL4:15 pmLambert-St Louis

6h 11m

1 stop

HLN9:26 pmHelena

$439

United Airlines

Jan 31

HLN2:27 pmHelena

5h 31m

1 stop

STL8:58 pmLambert-St Louis

Feb 3

STL9:57 amLambert-St Louis

12h 29m

2 stops

HLN9:26 pmHelena

$444

United Airlines

Jan 31

HLN6:15 amHelena

8h 48m

2 stops

STL4:03 pmLambert-St Louis

Feb 3

STL9:57 amLambert-St Louis

12h 29m

2 stops

HLN9:26 pmHelena

$449

Fly from

Fly to

Route

Depart

Return

Price

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 2/21

4:36 pm-2:23 pm

1 stop20h 47m

$150

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 2/21

4:36 pm-8:55 am

2 stops15h 19m

$241

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 2/21

4:36 pm-11:59 pm

3 stops54h 23m

$506

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

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 Helena to Lambert-St Louis?

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

What airlines fly to St. Louis?

United Airlines, Delta and Southwest are the top three most popular airlines that fly to St. Louis from Helena according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

When to book flights from Helena to St. Louis

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

Estimated round-trip price

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

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

Fastest flight time	6h 01m
Direct flights	None

The fastest flight from Helena to St. Louis takes 6h 01m

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

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How far is Helena to Lambert-St Louis by plane?
Helena and Lambert-St Louis are 1232.9 mi apart from one another. By plane, this route typically takes 6h 01m.
When did momondo last update prices for flights from Helena Airport to Lambert-St Louis Airport?
Prices for flights from Helena Airport to Lambert-St Louis Airport refresh daily.
How old do you have to be to fly from Helena Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Helena Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Helena to St. Louis. momondo saves you time and could save you money on your trip.

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

Flights from Helena to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Helena. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to St. Louis from Helena are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.