How long does it take to fly to Helena?

On average, it takes 3h 08m 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 48m.

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.

$225 Cheap Flights from Illinois to Helena in 2026

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

7:45 am - 12:15 pm

ORD

HLN

5h 30m

1 stop

5:35 am - 11:59 am

HLN

ORD

5h 24m

1 stop

$329Delta

Wed, Aug 5 - Sun, Aug 9

7:30 am - 12:23 pm

ORD

HLN

5h 53m

1 stop

12:50 pm - 9:58 pm

HLN

ORD

8h 08m

1 stop

$339Delta

Wed, Sep 2 - Tue, Sep 15

11:00 am - 10:30 pm

STL

HLN

12h 30m

2 stops

6:50 am - 1:34 pm

HLN

STL

5h 44m

1 stop

$344Delta

Tue, Aug 18 - Sat, Aug 22

7:30 am - 12:23 pm

ORD

HLN

5h 53m

1 stop

5:45 am - 2:58 pm

HLN

ORD

8h 13m

2 stops

$344Delta

Wed, Sep 2 - Wed, Sep 9

3:50 pm - 10:34 pm

ORD

HLN

7h 44m

2 stops

5:45 am - 4:48 pm

HLN

ORD

10h 03m

2 stops

$349Delta

Wed, Sep 2 - Tue, Sep 15

7:45 am - 12:20 pm

ORD

HLN

5h 35m

1 stop

1:00 pm - 9:57 pm

HLN

ORD

7h 57m

1 stop

$369Delta

Fri, Jun 12 - Fri, Jun 26

4:30 pm - 8:59 pm

STL

HLN

5h 29m

1 stop

7:00 am - 12:43 pm

HLN

STL

4h 43m

1 stop

$419United Airlines

Tue, Oct 27 - Sat, Oct 31

4:40 pm - 9:30 pm

STL

HLN

5h 50m

1 stop

2:35 pm - 8:38 pm

HLN

STL

5h 03m

1 stop

$421United Airlines

Tue, Aug 18 - Sat, Aug 22

9:23 am - 8:59 pm

STL

HLN

12h 36m

2 stops

7:00 am - 12:43 pm

HLN

STL

4h 43m

1 stop

$424United Airlines

Tue, Oct 27 - Sat, Oct 31

7:41 pm - 4:06 pm

STL

HLN

21h 25m

1 stop

4:43 pm - 8:51 am

HLN

STL

15h 08m

2 stops

$475Alaska Airlines

Tue, May 26 - Thu, May 28

Delta flights from Illinois to Helena

Our best Delta deals on Illinois to Helena flight tickets

Delta

Aug 5

ORD7:45 amChicago O'Hare Intl

5h 30m

1 stop

HLN12:15 pmHelena

Aug 9

HLN5:35 amHelena

5h 24m

1 stop

ORD11:59 amChicago O'Hare Intl

$329

Delta

Sep 2

ORD7:30 amChicago O'Hare Intl

5h 53m

1 stop

HLN12:23 pmHelena

Sep 15

HLN12:50 pmHelena

8h 08m

1 stop

ORD9:58 pmChicago O'Hare Intl

$339

Delta

Aug 18

STL11:00 amLambert-St Louis

12h 30m

2 stops

HLN10:30 pmHelena

Aug 22

HLN6:50 amHelena

5h 44m

1 stop

STL1:34 pmLambert-St Louis

$344

United Airlines flights from Illinois to Helena

Our best United Airlines deals on Illinois to Helena flight tickets

United Airlines

Oct 27

STL4:30 pmLambert-St Louis

5h 29m

1 stop

HLN8:59 pmHelena

Oct 31

HLN7:00 amHelena

4h 43m

1 stop

STL12:43 pmLambert-St Louis

$419

United Airlines

Aug 18

STL4:40 pmLambert-St Louis

5h 50m

1 stop

HLN9:30 pmHelena

Aug 22

HLN2:35 pmHelena

5h 03m

1 stop

STL8:38 pmLambert-St Louis

$421

United Airlines

Oct 27

STL9:23 amLambert-St Louis

12h 36m

2 stops

HLN8:59 pmHelena

Oct 31

HLN7:00 amHelena

4h 43m

1 stop

STL12:43 pmLambert-St Louis

$424

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 8/5

7:45 am-12:15 pm

1 stop5h 30m

Helena

Sun 8/9

5:35 am-11:59 am

1 stop5h 24m

$329

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 9/2

7:30 am-12:23 pm

1 stop5h 53m

Helena

Tue 9/15

12:50 pm-9:58 pm

1 stop8h 08m

$339

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/18

11:00 am-10:30 pm

2 stops12h 30m

Helena

Sat 8/22

6:50 am-1:34 pm

1 stop5h 44m

$344

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 9/2

7:30 am-12:23 pm

1 stop5h 53m

Helena

Wed 9/9

5:45 am-2:58 pm

2 stops8h 13m

$344

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 9/2

3:50 pm-10:34 pm

2 stops7h 44m

Helena

Tue 9/15

5:45 am-4:48 pm

2 stops10h 03m

$349

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Fri 6/12

7:45 am-12:20 pm

1 stop5h 35m

Helena

Fri 6/26

1:00 pm-9:57 pm

1 stop7h 57m

$369

Quickest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 10/27

4:30 pm-8:59 pm

1 stop5h 29m

Helena

Sat 10/31

7:00 am-12:43 pm

1 stop4h 43m

$419

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 8/18

4:40 pm-9:30 pm

1 stop5h 50m

Helena

Sat 8/22

2:35 pm-8:38 pm

1 stop5h 03m

$421

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 10/27

9:23 am-8:59 pm

2 stops12h 36m

Helena

Sat 10/31

7:00 am-12:43 pm

1 stop4h 43m

$424

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Tue 5/26

7:41 pm-4:06 pm

1 stop21h 25m

Helena

Thu 5/28

4:43 pm-8:51 am

2 stops15h 08m

$475

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, Delta, and United Airlines 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 53% 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 20m
Direct flights	None

The fastest flight from Illinois to Helena takes 5h 20m

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.