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Cheap flights from Helena to St. Louis from $250

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.
Alaska Airlines Logo
4:41 pm - 2:25 pmHLN  Helena-STL Lambert-St Louis
20h 44m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 4:04 pmSTL  Lambert-St Louis-HLN Helena
10h 04m1 stop Seattle/Tacoma Intl
$369Alaska Airlines
Mon, Nov 9 - Fri, Nov 13
Delta Logo
12:57 pm - 9:31 pmHLN  Helena-STL Lambert-St Louis
7h 34m1 stop Salt Lake City
Delta Logo
8:00 am - 12:17 pmSTL  Lambert-St Louis-HLN Helena
5h 17m1 stop Salt Lake City
$374Delta
Thu, Sep 10 - Wed, Sep 16
United Airlines Logo
2:26 pm - 8:38 pmHLN  Helena-STL Lambert-St Louis
5h 12m1 stop Denver Intl
United Airlines Logo
11:15 am - 9:30 pmSTL  Lambert-St Louis-HLN Helena
11h 15m2 stops Chicago O'Hare Intl Denver Intl
$379United Airlines
Thu, Sep 10 - Tue, Sep 15
Delta Logo
7:15 am - 1:30 pmHLN  Helena-STL Lambert-St Louis
5h 15m1 stop Salt Lake City
Delta Logo
1:55 pm - 10:24 pmSTL  Lambert-St Louis-HLN Helena
9h 29m2 stops Detroit Metropolitan Wayne County Salt Lake City
$409Delta
Wed, Sep 9 - Tue, Sep 15
Delta Logo
12:57 pm - 11:42 pmHLN  Helena-STL Lambert-St Louis
9h 45m2 stops Salt Lake City Atlanta Hartsfield-Jackson
Delta Logo
8:00 am - 12:17 pmSTL  Lambert-St Louis-HLN Helena
5h 17m1 stop Salt Lake City
$414Delta
Thu, Sep 10 - Wed, Sep 16
United Airlines Logo
2:23 pm - 8:59 pmHLN  Helena-STL Lambert-St Louis
5h 36m1 stop Denver Intl
United Airlines Logo
4:39 pm - 9:31 pmSTL  Lambert-St Louis-HLN Helena
5h 52m1 stop Denver Intl
$429United Airlines
Sat, Nov 7 - Tue, Nov 10
United Airlines Logo
2:23 pm - 8:59 pmHLN  Helena-STL Lambert-St Louis
5h 36m1 stop Denver Intl
United Airlines Logo
1:08 pm - 9:31 pmSTL  Lambert-St Louis-HLN Helena
9h 23m2 stops Chicago O'Hare Intl Denver Intl
$434United Airlines
Sat, Nov 7 - Tue, Nov 10
United Airlines Logo
2:26 pm - 11:31 pmHLN  Helena-STL Lambert-St Louis
8h 05m1 stop Denver Intl
United Airlines Logo
4:40 pm - 9:30 pmSTL  Lambert-St Louis-HLN Helena
5h 50m1 stop Denver Intl
$444United Airlines
Thu, Sep 10 - Mon, Sep 14
United Airlines Logo
6:15 am - 8:00 pmHLN  Helena-STL Lambert-St Louis
12h 45m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
12:59 pm - 9:30 pmSTL  Lambert-St Louis-HLN Helena
9h 31m2 stops Chicago O'Hare Intl Denver Intl
$485United Airlines
Thu, Sep 10 - Tue, Sep 15
Alaska Airlines Logo
5:18 pm - 2:21 pmHLN  Helena-STL Lambert-St Louis
20h 03m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:42 pm - 4:49 pmSTL  Lambert-St Louis-HLN Helena
25h 07m1 stop Seattle/Tacoma Intl
$494Alaska Airlines
Tue, Sep 15 - Thu, Oct 15

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United Airlines flights from Helena to St. Louis

Our best United Airlines deals on Helena to St. Louis flight tickets
United Airlines
Sep 10
HLN2:26 pmHelena
5h 12m
1 stop
STL8:38 pmLambert-St Louis
Sep 15
STL11:15 amLambert-St Louis
11h 15m
2 stops
HLN9:30 pmHelena
$379
United Airlines
Nov 7
HLN2:23 pmHelena
5h 36m
1 stop
STL8:59 pmLambert-St Louis
Nov 10
STL4:39 pmLambert-St Louis
5h 52m
1 stop
HLN9:31 pmHelena
$429
United Airlines
Nov 7
HLN2:23 pmHelena
5h 36m
1 stop
STL8:59 pmLambert-St Louis
Nov 10
STL1:08 pmLambert-St Louis
9h 23m
2 stops
HLN9:31 pmHelena
$434

Delta flights from Helena to St. Louis

Our best Delta deals on Helena to St. Louis flight tickets
Delta
Sep 10
HLN12:57 pmHelena
7h 34m
1 stop
STL9:31 pmLambert-St Louis
Sep 16
STL8:00 amLambert-St Louis
5h 17m
1 stop
HLN12:17 pmHelena
$374
Delta
Sep 9
HLN7:15 amHelena
5h 15m
1 stop
STL1:30 pmLambert-St Louis
Sep 15
STL1:55 pmLambert-St Louis
9h 29m
2 stops
HLN10:24 pmHelena
$409
Delta
Sep 10
HLN12:57 pmHelena
9h 45m
2 stops
STL11:42 pmLambert-St Louis
Sep 16
STL8:00 amLambert-St Louis
5h 17m
1 stop
HLN12:17 pmHelena
$414

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

Mon 11/9

4:41 pm-2:25 pm

1 stop20h 44m

Lambert-St Louis

Fri 11/13

7:00 am-4:04 pm

1 stop10h 04m

$369

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Thu 9/10

12:57 pm-9:31 pm

1 stop7h 34m

Lambert-St Louis

Wed 9/16

8:00 am-12:17 pm

1 stop5h 17m

$374

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Thu 9/10

2:26 pm-8:38 pm

1 stop5h 12m

Lambert-St Louis

Tue 9/15

11:15 am-9:30 pm

2 stops11h 15m

$379

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Wed 9/9

7:15 am-1:30 pm

1 stop5h 15m

Lambert-St Louis

Tue 9/15

1:55 pm-10:24 pm

2 stops9h 29m

$409

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Thu 9/10

12:57 pm-11:42 pm

2 stops9h 45m

Lambert-St Louis

Wed 9/16

8:00 am-12:17 pm

1 stop5h 17m

$414
Quickest round-trip

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/7

2:23 pm-8:59 pm

1 stop5h 36m

Lambert-St Louis

Tue 11/10

4:39 pm-9:31 pm

1 stop5h 52m

$429

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Sat 11/7

2:23 pm-8:59 pm

1 stop5h 36m

Lambert-St Louis

Tue 11/10

1:08 pm-9:31 pm

2 stops9h 23m

$434

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Thu 9/10

2:26 pm-11:31 pm

1 stop8h 05m

Lambert-St Louis

Mon 9/14

4:40 pm-9:30 pm

1 stop5h 50m

$444

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Thu 9/10

6:15 am-8:00 pm

2 stops12h 45m

Lambert-St Louis

Tue 9/15

12:59 pm-9:30 pm

2 stops9h 31m

$485

HelenaSt. Louis

HLN Helena - STL Lambert-St Louis

HLNSTL

Helena

Tue 9/15

5:18 pm-2:21 pm

1 stop20h 03m

Lambert-St Louis

Thu 10/15

4:42 pm-4:49 pm

1 stop25h 07m

$494

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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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 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?

Delta, United Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Helena according to our data. Delta 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

Best Price Found

$250

Fastest flight time

5h 15m

Direct flights

None
The best one-way flight to St. Louis from Helena in the past 72 hours is $250. The best round-trip flight deal from Helena to St. Louis found on momondo in the last 72 hours is $369.
The fastest flight from Helena to St. Louis takes 5h 15m
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 15m.

  • 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
Hermann
Alton
Florissant
Collinsville
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

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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