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Cheap flights from Helena to St. Louis from $434

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Helena to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:07 pm - 9:18 pmHLN  Helena-STL Lambert-St Louis
7h 11m1 stop Salt Lake City
Delta Logo
7:08 am - 12:27 pmSTL  Lambert-St Louis-HLN Helena
6h 19m1 stop Salt Lake City
$434Delta
Wed, Nov 11 - Sun, Nov 15
Delta Logo
1:07 pm - 11:22 pmHLN  Helena-STL Lambert-St Louis
9h 15m2 stops Salt Lake City Minneapolis St Paul
Delta Logo
7:08 am - 12:27 pmSTL  Lambert-St Louis-HLN Helena
6h 19m1 stop Salt Lake City
$439Delta
Wed, Nov 11 - Sun, Nov 15
United Airlines Logo
2:23 pm - 9:00 pmHLN  Helena-STL Lambert-St Louis
5h 37m1 stop Denver Intl
United Airlines Logo
8:50 am - 1:40 pmSTL  Lambert-St Louis-HLN Helena
5h 50m1 stop Denver Intl
$449United Airlines
Sat, Nov 7 - Wed, Nov 11
United Airlines Logo
2:23 pm - 9:00 pmHLN  Helena-STL Lambert-St Louis
5h 37m1 stop Denver Intl
United Airlines Logo
6:00 am - 1:40 pmSTL  Lambert-St Louis-HLN Helena
8h 40m2 stops Chicago O'Hare Intl Denver Intl
$454United Airlines
Sat, Nov 7 - Wed, Nov 11
Delta Logo
1:08 pm - 11:54 pmHLN  Helena-STL Lambert-St Louis
9h 46m2 stops Salt Lake City Atlanta Hartsfield-Jackson
Delta Logo
10:05 am - 10:26 pmSTL  Lambert-St Louis-HLN Helena
13h 21m2 stops Atlanta Hartsfield-Jackson Salt Lake City
$479Delta
Sat, Nov 7 - Wed, Nov 11
United Airlines Logo
6:28 am - 12:38 pmHLN  Helena-STL Lambert-St Louis
5h 10m1 stop Denver Intl
United Airlines Logo
4:39 pm - 9:31 pmSTL  Lambert-St Louis-HLN Helena
5h 52m1 stop Denver Intl
$489United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
2:23 pm - 8:59 pmHLN  Helena-STL Lambert-St Louis
5h 36m1 stop Denver Intl
United Airlines Logo
9:40 am - 9:31 pmSTL  Lambert-St Louis-HLN Helena
12h 51m2 stops Chicago O'Hare Intl Denver Intl
$494United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
6:28 am - 4:59 pmHLN  Helena-STL Lambert-St Louis
9h 31m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
10:53 am - 9:31 pmSTL  Lambert-St Louis-HLN Helena
11h 38m2 stops Chicago O'Hare Intl Denver Intl
$499United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
6:28 am - 12:38 pmHLN  Helena-STL Lambert-St Louis
5h 10m1 stop Denver Intl
United Airlines Logo
4:39 pm - 9:31 pmSTL  Lambert-St Louis-HLN Helena
5h 52m1 stop Denver Intl
$524United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
2:23 pm - 8:59 pmHLN  Helena-STL Lambert-St Louis
5h 36m1 stop Denver Intl
United Airlines Logo
9:40 am - 9:31 pmSTL  Lambert-St Louis-HLN Helena
12h 51m2 stops Chicago O'Hare Intl Denver Intl
$529United Airlines
Sat, Nov 14 - Tue, Nov 17

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Delta flights from Helena to St. Louis

Our best Delta deals on Helena to St. Louis flight tickets
Delta
Nov 11
HLN1:07 pmHelena
7h 11m
1 stop
STL9:18 pmLambert-St Louis
Nov 15
STL7:08 amLambert-St Louis
6h 19m
1 stop
HLN12:27 pmHelena
$434
Delta
Nov 11
HLN1:07 pmHelena
9h 15m
2 stops
STL11:22 pmLambert-St Louis
Nov 15
STL7:08 amLambert-St Louis
6h 19m
1 stop
HLN12:27 pmHelena
$439
Delta
Nov 7
HLN1:08 pmHelena
9h 46m
2 stops
STL11:54 pmLambert-St Louis
Nov 11
STL10:05 amLambert-St Louis
13h 21m
2 stops
HLN10:26 pmHelena
$479

United Airlines flights from Helena to St. Louis

Our best United Airlines deals on Helena to St. Louis flight tickets
United Airlines
Nov 7
HLN2:23 pmHelena
5h 37m
1 stop
STL9:00 pmLambert-St Louis
Nov 11
STL8:50 amLambert-St Louis
5h 50m
1 stop
HLN1:40 pmHelena
$449
United Airlines
Nov 7
HLN2:23 pmHelena
5h 37m
1 stop
STL9:00 pmLambert-St Louis
Nov 11
STL6:00 amLambert-St Louis
8h 40m
2 stops
HLN1:40 pmHelena
$454
United Airlines
Nov 14
HLN6:28 amHelena
5h 10m
1 stop
STL12:38 pmLambert-St Louis
Nov 17
STL4:39 pmLambert-St Louis
5h 52m
1 stop
HLN9:31 pmHelena
$489

momondo Fare Finder

 
Use the filters below to find and compare flights from Helena to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Wed 11/11

1:07 pm-9:18 pm

1 stop7h 11m

Lambert-St Louis

Sun 11/15

7:08 am-12:27 pm

1 stop6h 19m

$434

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Wed 11/11

1:07 pm-11:22 pm

2 stops9h 15m

Lambert-St Louis

Sun 11/15

7:08 am-12:27 pm

1 stop6h 19m

$439

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/7

2:23 pm-9:00 pm

1 stop5h 37m

Lambert-St Louis

Wed 11/11

8:50 am-1:40 pm

1 stop5h 50m

$449

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/7

2:23 pm-9:00 pm

1 stop5h 37m

Lambert-St Louis

Wed 11/11

6:00 am-1:40 pm

2 stops8h 40m

$454

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/7

1:08 pm-11:54 pm

2 stops9h 46m

Lambert-St Louis

Wed 11/11

10:05 am-10:26 pm

2 stops13h 21m

$479
Quickest round-trip

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/14

6:28 am-12:38 pm

1 stop5h 10m

Lambert-St Louis

Tue 11/17

4:39 pm-9:31 pm

1 stop5h 52m

$489

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/14

2:23 pm-8:59 pm

1 stop5h 36m

Lambert-St Louis

Tue 11/17

9:40 am-9:31 pm

2 stops12h 51m

$494

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/14

6:28 am-4:59 pm

2 stops9h 31m

Lambert-St Louis

Tue 11/17

10:53 am-9:31 pm

2 stops11h 38m

$499

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/14

6:28 am-12:38 pm

1 stop5h 10m

Lambert-St Louis

Tue 11/17

4:39 pm-9:31 pm

1 stop5h 52m

$524

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/14

2:23 pm-8:59 pm

1 stop5h 36m

Lambert-St Louis

Tue 11/17

9:40 am-9:31 pm

2 stops12h 51m

$529

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to St. Louis from

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 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 47% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 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

Best Price Found

$434

Fastest flight time

5h 10m

Direct flights

None
The best flight deal from Helena to St. Louis found on momondo in the last 72 hours is $434
The fastest flight from Helena to St. Louis takes 5h 10m
There are no direct flights from Helena to St. Louis. There are no popular flight routes from Helena to St. Louis.
Search flight deals

Frequently asked questions about flying from Helena to St. Louis

  • 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 5h 10m.

  • 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.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Maryland Heights
St. Peters
Alton
Collinsville
Florissant
Farmington
Hermann
Festus
Clayton
Fenton
Edwardsville
O'Fallon
Eureka
Wentzville
Litchfield
Grafton
Waterloo

Why use momondo?

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.

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