Which airports can I use when flying from St. Louis to Helena?

Flights from St. Louis to Helena usually depart from Lambert-St Louis (STL) and arrive at Helena (HLN).

What cabin classes can I book on flights from St. Louis to Helena?

Only Economy Class is available on flights from St. Louis to Helena.

Which airports do connecting flights from St. Louis to Helena pass through?

Connecting flights from St. Louis to Helena most commonly pass through: • Denver Intl (DEN) - 91% of one-stop connections • Salt Lake City (SLC) - 9% of one-stop connections

Can I save money by using flexible dates for flights from St. Louis to Helena?

Yes. Flexible dates can save you up to 20% on flights from St. Louis to Helena. Thursday is the cheapest departure day at $545 round-trip on average, while Friday is the most expensive at $681, a difference of $136. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

How long is a flight from St. Louis to Helena?

There are currently no nonstop flights available from St. Louis to Helena. Flights with 1 layover take between 5h 45m and 6h 14m in total, depending on the connection.

Do I need a passport to fly from St. Louis to Helena?

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

Have flight prices from St. Louis to Helena changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $449 to $918. That means the highest observed fare was about 2x higher than the lowest one.

How much time can I save by choosing a different layover airport from St. Louis to Helena?

Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 5h 45m, compared with 6h 14m via Salt Lake City (SLC).

What is the time difference between St. Louis and Helena?

Helena is 1 hour behind St. Louis (Mountain Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Helena Airport (HLN)?

Helena Airport (HLN) hosts 5 major car rental companies, with daily rates averaging $83 for economy cars. Top options include: • Budget • Enterprise Rent-A-Car • Hertz • Avis • National

How much should I expect to pay for a St. Louis to Helena flight?

Round-trip flights from St. Louis to Helena range from $447 to $785, with an average of $675 over the past 12 months. Anything below $447 counts as a good deal.

How much is a round-trip flight from St. Louis to Helena?

Round-trip flights from St. Louis to Helena typically range from $447 to $785. The lowest price found in the past 5 days was $449, on United Airlines.

Which airline is the cheapest to fly from St. Louis to Helena?

United Airlines ($449) and Delta ($459) are the cheapest airlines to fly round-trip from St. Louis to Helena according to KAYAK data over the last 5 days.

What’s the most popular layover airport when flying from St. Louis to Helena?

Denver Intl (DEN) is the most popular layover for the St. Louis to Helena route. 91% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via DEN.

What is the cheapest layover airport when flying from St. Louis to Helena?

Flights via Salt Lake City (SLC) offer the most affordable fares, with an average round-trip price of $242. Based on KAYAK data over the past 3 months.

When flying from St. Louis to Helena which airport offers the shortest layover?

Denver Intl (DEN) had the shortest average connection time for St. Louis to Helena layovers at 3h 26m over the past 3 months.

$449 CHEAP FLIGHTS from St. Louis to Helena (STL - HLN)

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Cheapest round-trip

$449

Typical prices: $447-$785

United Airlines

Tue 11/13Sat 11/17

STL - HLN • 1 stop

When to travel

August

Cheapest • 34% price drop

July

Most popular

Good to know

Top layover airports

Salt Lake City (SLC)

Cheapest • Avg $242 (round-trip)

Denver Intl (DEN)

Shortest trip • 5h 45m (one-way)

Insights

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We hope you love your trip to Helena!

Flight Deals

Cheap Flights from St. Louis to Helena (STL-HLN)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from St. Louis to Helena

Fri, Nov 13 - Tue, Nov 17

8:50 am - 1:40 pmSTL Lambert-St Louis-HLN Helena

5h 50m1 stop Denver Intl

2:23 pm - 8:59 pmHLN Helena-STL Lambert-St Louis

5h 36m1 stop Denver Intl

$449United Airlines

Fri, Nov 13 - Tue, Nov 17

9:40 am - 9:31 pmSTL Lambert-St Louis-HLN Helena

12h 51m2 stops Chicago O'Hare Intl Denver Intl

2:23 pm - 8:59 pmHLN Helena-STL Lambert-St Louis

5h 36m1 stop Denver Intl

$454United Airlines

Fri, Nov 13 - Tue, Nov 17

2:21 pm - 10:26 pmSTL Lambert-St Louis-HLN Helena

9h 05m2 stops Detroit Metropolitan Wayne County Salt Lake City

1:07 pm - 11:22 pmHLN Helena-STL Lambert-St Louis

9h 15m2 stops Salt Lake City Minneapolis St Paul

$459Delta

Fri, Dec 11 - Sat, Dec 26

7:08 am - 12:30 pmSTL Lambert-St Louis-HLN Helena

6h 22m1 stop Salt Lake City

1:10 pm - 11:28 pmHLN Helena-STL Lambert-St Louis

9h 18m2 stops Salt Lake City Minneapolis St Paul

$484Delta

Sat, Feb 6 - Tue, Feb 9

8:52 am - 1:40 pmSTL Lambert-St Louis-HLN Helena

5h 48m1 stop Denver Intl

2:27 pm - 8:38 pmHLN Helena-STL Lambert-St Louis

5h 11m1 stop Denver Intl

$489United Airlines

Sat, Feb 6 - Tue, Feb 9

10:45 am - 9:32 pmSTL Lambert-St Louis-HLN Helena

11h 47m2 stops Chicago O'Hare Intl Denver Intl

2:27 pm - 8:38 pmHLN Helena-STL Lambert-St Louis

5h 11m1 stop Denver Intl

$494United Airlines

Sat, Feb 6 - Wed, Feb 10

9:05 am - 9:32 pmSTL Lambert-St Louis-HLN Helena

13h 27m2 stops Chicago O'Hare Intl Denver Intl

6:15 am - 5:50 pmHLN Helena-STL Lambert-St Louis

10h 35m2 stops Denver Intl Chicago O'Hare Intl

$499United Airlines

Fri, Dec 11 - Sat, Dec 26

2:50 pm - 9:26 pmSTL Lambert-St Louis-HLN Helena

7h 36m1 stop Denver Intl

2:27 pm - 9:08 pmHLN Helena-STL Lambert-St Louis

5h 41m1 stop Denver Intl

$518United Airlines

Sat, Feb 6 - Tue, Feb 9

5:02 am - 1:40 pmSTL Lambert-St Louis-HLN Helena

9h 38m2 stops Chicago O'Hare Intl Denver Intl

6:15 am - 9:49 pmHLN Helena-STL Lambert-St Louis

14h 34m2 stops Denver Intl Newark

$569United Airlines

Sat, Feb 6 - Tue, Feb 9

10:45 am - 9:32 pmSTL Lambert-St Louis-HLN Helena

11h 47m2 stops Chicago O'Hare Intl Denver Intl

2:27 pm - 12:13 pmHLN Helena-STL Lambert-St Louis

20h 46m2 stops Denver Intl Chicago O'Hare Intl

$587United Airlines

Booking Insights

Price, demand and travel trends for St. Louis to Helena flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from St. Louis to Helena? This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Helena departing in november.

Find deals

High season	July
Cheapest flight	$449

The most popular month to fly with an average 40% increase in travelers.

Round-trip flight from St. Louis to Helena

When to book flights from St. Louis to Helena

Are your dates flexible? Find out the best times to travel from St. Louis to Helena based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What cabin classes can I book on flights from St. Louis to Helena?
Only Economy Class is available on flights from St. Louis to Helena.
How long is a flight from St. Louis to Helena?
There are currently no nonstop flights available from St. Louis to Helena. Flights with 1 layover take between 5h 45m and 6h 14m in total, depending on the connection.
Do I need a passport to fly from St. Louis to Helena?
No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.
How much should I expect to pay for a St. Louis to Helena flight?
Round-trip flights from St. Louis to Helena range from $447 to $785, with an average of $675 over the past 12 months. Anything below $447 counts as a good deal.
Have flight prices from St. Louis to Helena changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $449 to $918. That means the highest observed fare was about 2x higher than the lowest one.
What car rental options are available at Helena Airport (HLN)?
Helena Airport (HLN) hosts 5 major car rental companies, with daily rates averaging $83 for economy cars. Top options include:

• Budget
• Enterprise Rent-A-Car
• Hertz
• Avis
• National
Which airports can I use when flying from St. Louis to Helena?
Flights from St. Louis to Helena usually depart from Lambert-St Louis (STL) and arrive at Helena (HLN).
Which airports do connecting flights from St. Louis to Helena pass through?
Connecting flights from St. Louis to Helena most commonly pass through:

• Denver Intl (DEN) - 91% of one-stop connections
• Salt Lake City (SLC) - 9% of one-stop connections
Can I save money by using flexible dates for flights from St. Louis to Helena?
Yes. Flexible dates can save you up to 20% on flights from St. Louis to Helena. Thursday is the cheapest departure day at $545 round-trip on average, while Friday is the most expensive at $681, a difference of $136.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
How much time can I save by choosing a different layover airport from St. Louis to Helena?
Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 5h 45m, compared with 6h 14m via Salt Lake City (SLC).
What is the time difference between St. Louis and Helena?
Helena is 1 hour behind St. Louis (Mountain Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

If your dates are flexible, aim for a Thursday departure and avoid flying on Friday. On this route, Thursday flights average $545, about $136 less than Friday fares (20% savings) based on the last 12 months.
If you can choose when to travel, plan your St. Louis to Helena trip for August. Fares historically average $447 round-trip in that month - typically $460 less than the most expensive month, which is July (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Helena Airport.

• La Quinta Inn & Suites by Wyndham Helena
• Baymont by Wyndham Helena
• Home2 Suites By Hilton Helena

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STL - HLN

$449 Find Cheap Flights from St. Louis to Helena - Compare and Save

Everything you should know

Cheap Flights from St. Louis to Helena (STL-HLN)

Recent round-trip flight deals from St. Louis to Helena

Recent one-way flight deals from St. Louis to Helena

Price, demand and travel trends for St. Louis to Helena flights

How much is a round-trip flight from St. Louis to Helena?

Which airline is the cheapest to fly from St. Louis to Helena?

What’s the most popular layover airport when flying from St. Louis to Helena?

What is the cheapest layover airport when flying from St. Louis to Helena?

When flying from St. Louis to Helena which airport offers the shortest layover?

Key details for St. Louis to Helena flights

High season

Cheapest flight

When to book flights from St. Louis to Helena

Your St. Louis to Helena flight questions, answered

Your guide to booking St. Louis to Helena flights

More options for your flight from St. Louis to Helena

Complete your trip to Helena with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from St. Louis to Helena

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Flights from domestic origins to Helena

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