How long does it take to fly to Helena?

On average, it takes 3h 12m to fly from Illinois to Helena if you fly out of Chicago (the most popular airport in Illinois) and into Bozeman (the most popular airport in Helena). If you’re flying out of Moline and into Bozeman, then the flight time is around 5h 44m.

When did momondo last update prices for flights from Illinois to Helena Airport?

Prices for flights from Illinois to Helena Airport were last updated today.

How old do you have to be to fly from Illinois to Helena Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Helena Airport.

What documentation or ID do you need to fly to Helena Airport?

The travel and health documents required for your trip to Helena Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Helena Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$195 Cheap Flights from Illinois to Helena in 2026

Find the cheapest flights from Illinois to Helena

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 12:15 pm

STL

HLN

5h 15m

1 stop

12:55 pm - 9:00 pm

HLN

STL

7h 05m

1 stop

$329Delta

Sat, Aug 15 - Sat, Aug 22

7:45 am - 12:15 pm

ORD

HLN

5h 30m

1 stop

5:40 am - 11:59 am

HLN

ORD

5h 19m

1 stop

$329Delta

Tue, Jul 28 - Fri, Aug 28

9:30 am - 9:30 pm

STL

HLN

13h 00m

2 stops

2:35 pm - 8:46 pm

HLN

STL

5h 11m

1 stop

$334United Airlines

Wed, Sep 2 - Sun, Sep 6

7:45 am - 12:15 pm

ORD

HLN

5h 30m

1 stop

12:55 pm - 11:57 pm

HLN

ORD

10h 02m

2 stops

$334Delta

Tue, Jul 28 - Fri, Aug 28

9:30 am - 9:30 pm

STL

HLN

13h 00m

2 stops

6:15 am - 3:38 pm

HLN

STL

8h 23m

2 stops

$339United Airlines

Wed, Sep 2 - Sun, Sep 6

12:59 pm - 9:30 pm

STL

HLN

9h 31m

2 stops

2:35 pm - 8:46 pm

HLN

STL

5h 11m

1 stop

$361United Airlines

Sat, Aug 15 - Sat, Aug 22

7:45 am - 12:15 pm

ORD

HLN

5h 30m

1 stop

12:55 pm - 9:33 pm

HLN

ORD

7h 38m

1 stop

$364Delta

Wed, Jul 29 - Sat, Aug 29

7:45 am - 12:15 pm

ORD

HLN

5h 30m

1 stop

12:55 pm - 11:57 pm

HLN

ORD

10h 02m

2 stops

$369Delta

Wed, Jul 29 - Fri, Aug 28

8:00 am - 12:15 pm

STL

HLN

5h 15m

1 stop

5:40 am - 1:38 pm

HLN

STL

6h 58m

1 stop

$394Delta

Sat, Aug 29 - Wed, Sep 2

7:56 pm - 4:32 pm

STL

HLN

21h 36m

1 stop

5:09 pm - 1:52 pm

HLN

STL

19h 43m

1 stop

$589Alaska Airlines

Fri, Jul 17 - Tue, Jul 21

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Delta flights from Illinois to Helena

Our best Delta deals on Illinois to Helena flight tickets

Delta

Aug 15

STL8:00 amLambert-St Louis

5h 15m

1 stop

HLN12:15 pmHelena

Aug 22

HLN12:55 pmHelena

7h 05m

1 stop

STL9:00 pmLambert-St Louis

$329

Delta

Jul 28

ORD7:45 amChicago O'Hare Intl

5h 30m

1 stop

HLN12:15 pmHelena

Aug 28

HLN12:55 pmHelena

10h 02m

2 stops

ORD11:57 pmChicago O'Hare Intl

$334

Delta

Jul 29

ORD7:45 amChicago O'Hare Intl

5h 30m

1 stop

HLN12:15 pmHelena

Aug 29

HLN12:55 pmHelena

7h 38m

1 stop

ORD9:33 pmChicago O'Hare Intl

$364

United Airlines flights from Illinois to Helena

Our best United Airlines deals on Illinois to Helena flight tickets

United Airlines

Sep 2

STL9:30 amLambert-St Louis

13h 00m

2 stops

HLN9:30 pmHelena

Sep 6

HLN2:35 pmHelena

5h 11m

1 stop

STL8:46 pmLambert-St Louis

$334

United Airlines

Sep 2

STL9:30 amLambert-St Louis

13h 00m

2 stops

HLN9:30 pmHelena

Sep 6

HLN6:15 amHelena

8h 23m

2 stops

STL3:38 pmLambert-St Louis

$339

United Airlines

Aug 15

STL12:59 pmLambert-St Louis

9h 31m

2 stops

HLN9:30 pmHelena

Aug 22

HLN2:35 pmHelena

5h 11m

1 stop

STL8:46 pmLambert-St Louis

$361

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 8/15

8:00 am-12:15 pm

1 stop5h 15m

Helena

Sat 8/22

12:55 pm-9:00 pm

1 stop7h 05m

$329

Quickest round-trip

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Tue 7/28

7:45 am-12:15 pm

1 stop5h 30m

Helena

Fri 8/28

5:40 am-11:59 am

1 stop5h 19m

$329

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 9/2

9:30 am-9:30 pm

2 stops13h 00m

Helena

Sun 9/6

2:35 pm-8:46 pm

1 stop5h 11m

$334

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Tue 7/28

7:45 am-12:15 pm

1 stop5h 30m

Helena

Fri 8/28

12:55 pm-11:57 pm

2 stops10h 02m

$334

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 9/2

9:30 am-9:30 pm

2 stops13h 00m

Helena

Sun 9/6

6:15 am-3:38 pm

2 stops8h 23m

$339

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 8/15

12:59 pm-9:30 pm

2 stops9h 31m

Helena

Sat 8/22

2:35 pm-8:46 pm

1 stop5h 11m

$361

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 7/29

7:45 am-12:15 pm

1 stop5h 30m

Helena

Sat 8/29

12:55 pm-9:33 pm

1 stop7h 38m

$364

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 7/29

7:45 am-12:15 pm

1 stop5h 30m

Helena

Fri 8/28

12:55 pm-11:57 pm

2 stops10h 02m

$369

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 8/29

8:00 am-12:15 pm

1 stop5h 15m

Helena

Wed 9/2

5:40 am-1:38 pm

1 stop6h 58m

$394

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 7/17

7:56 pm-4:32 pm

1 stop21h 36m

Helena

Tue 7/21

5:09 pm-1:52 pm

1 stop19h 43m

$589

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 Illinois to Helena

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

Airlines

Other information

What is the cheapest airline that flies from Illinois to Helena?

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Illinois to Helena

What airlines fly to Helena?

American Airlines, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Helena from Illinois according to our data. American Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 5 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

Cheap Illinois to Helena flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Helena

Fastest flight time	5h 30m
Direct flights	None

The fastest flight from Illinois to Helena takes 5h 30m

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

Search flight deals

Frequently asked questions about flying from Illinois to Helena

When did momondo last update prices for flights from Illinois to Helena Airport?
Prices for flights from Illinois to Helena Airport were last updated today.
How old do you have to be to fly from Illinois to Helena Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Helena Airport.
What documentation or ID do you need to fly to Helena Airport?
The travel and health documents required for your trip to Helena Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Helena Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Helena?

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

Can I find flights from Illinois to Helena with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Helena flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Helena?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Helena from Illinois.

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

Yes. momondo can track prices for Illinois to Helena flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.