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

Alaska Airlines and Delta are the most popular carriers 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 46% 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 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.

$186 Cheap Flights from Helena to St. Louis in 2025/26

1 adult

0 bags

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Find the cheapest flights from Helena to St. Louis

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Cheap round-trip flights

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6:48 pm - 1:54 pmHLN-STL

18h 06m1 stop

2:47 pm - 3:59 pmSTL-HLN

26h 12m1 stop

$363Alaska Airlines

Find Deal

Tue, Feb 10 - Sat, Feb 14

6:48 pm - 1:54 pmHLN-STL

18h 06m1 stop

2:50 pm - 6:11 pmSTL-HLN

28h 21m1 stop

$444Alaska Airlines

Find Deal

Sat, Jan 17 - Wed, Jan 21

6:48 pm - 1:54 pmHLN-STL

18h 06m1 stop

2:50 pm - 6:11 pmSTL-HLN

28h 21m1 stop

$464Alaska Airlines

Find Deal

Sat, Jan 17 - Wed, Jan 21

1:10 pm - 11:25 pmHLN-STL

9h 15m2 stops

2:38 pm - 10:29 pmSTL-HLN

8h 51m1 stop

$482Delta

Find Deal

Sat, Jan 17 - Wed, Jan 21

6:48 pm - 6:14 pmHLN-STL

22h 26m2 stops

5:14 am - 3:59 pmSTL-HLN

11h 45m2 stops

$520Alaska Airlines

Find Deal

Tue, Feb 10 - Sat, Feb 14

6:48 pm - 7:29 pmHLN-STL

23h 41m2 stops

7:04 am - 6:11 pmSTL-HLN

12h 07m2 stops

$564Alaska Airlines

Find Deal

Sat, Jan 17 - Wed, Jan 21

6:15 am - 4:03 pmHLN-STL

8h 48m2 stops

6:30 am - 1:41 pmSTL-HLN

8h 11m2 stops

$567United Airlines

Find Deal

Sat, Jan 17 - Wed, Jan 21

6:32 pm - 4:26 pmHLN-STL

20h 54m1 stop

5:26 pm - 6:11 pmSTL-HLN

25h 45m1 stop

$653Alaska Airlines

Find Deal

Sun, Jan 4 - Tue, Jan 6

6:32 pm - 11:51 pmHLN-STL

28h 19m2 stops

7:00 am - 5:55 pmSTL-HLN

11h 55m1 stop

$659Alaska Airlines

Find Deal

Sun, Jan 4 - Tue, Jan 6

6:32 pm - 11:51 pmHLN-STL

28h 19m2 stops

3:40 pm - 6:11 pmSTL-HLN

27h 31m2 stops

$665Alaska Airlines

Find Deal

Sun, Jan 4 - Tue, Jan 6

Alaska Airlines flights from Helena to St. Louis

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

Alaska Airlines

Feb 10

HLN6:48 pmHelena

18h 06m

1 stop

STL1:54 pmLambert-St Louis

Feb 14

STL2:47 pmLambert-St Louis

26h 12m

1 stop

HLN3:59 pmHelena

$363

Find similar

Alaska Airlines

Jan 17

HLN6:48 pmHelena

18h 06m

1 stop

STL1:54 pmLambert-St Louis

Jan 21

STL2:50 pmLambert-St Louis

28h 21m

1 stop

HLN6:11 pmHelena

$444

Find similar

Alaska Airlines

Jan 17

HLN6:48 pmHelena

18h 06m

1 stop

STL1:54 pmLambert-St Louis

Jan 21

STL2:50 pmLambert-St Louis

28h 21m

1 stop

HLN6:11 pmHelena

$464

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Tue 2/10

6:48 pm-1:54 pm

1 stop18h 06m

Lambert-St Louis

Sat 2/14

2:47 pm-3:59 pm

1 stop26h 12m

$363

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 1/17

6:48 pm-1:54 pm

1 stop18h 06m

Lambert-St Louis

Wed 1/21

2:50 pm-6:11 pm

1 stop28h 21m

$444

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 1/17

6:48 pm-1:54 pm

1 stop18h 06m

Lambert-St Louis

Wed 1/21

2:50 pm-6:11 pm

1 stop28h 21m

$464

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 1/17

1:10 pm-11:25 pm

2 stops9h 15m

Lambert-St Louis

Wed 1/21

2:38 pm-10:29 pm

1 stop8h 51m

$482

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Tue 2/10

6:48 pm-6:14 pm

2 stops22h 26m

Lambert-St Louis

Sat 2/14

5:14 am-3:59 pm

2 stops11h 45m

$520

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 1/17

6:48 pm-7:29 pm

2 stops23h 41m

Lambert-St Louis

Wed 1/21

7:04 am-6:11 pm

2 stops12h 07m

$564

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 1/17

6:15 am-4:03 pm

2 stops8h 48m

Lambert-St Louis

Wed 1/21

6:30 am-1:41 pm

2 stops8h 11m

$567

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sun 1/4

6:32 pm-4:26 pm

1 stop20h 54m

Lambert-St Louis

Tue 1/6

5:26 pm-6:11 pm

1 stop25h 45m

$653

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sun 1/4

6:32 pm-11:51 pm

2 stops28h 19m

Lambert-St Louis

Tue 1/6

7:00 am-5:55 pm

1 stop11h 55m

$659

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sun 1/4

6:32 pm-11:51 pm

2 stops28h 19m

Lambert-St Louis

Tue 1/6

3:40 pm-6:11 pm

2 stops27h 31m

$665

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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

Prices

Airlines

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $388. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $896. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Helena in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $388 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $644 per ticket.

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	7h 18m
Direct flights	None

The fastest flight from Helena to St. Louis takes 7h 18m

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

Search flight deals

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 8h 48m.
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.