How long does it take to fly to Helena?

On average, it takes 3h 10m 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 Peoria and into Bozeman, then the flight time is around 5h 27m.

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.

$180 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.

7:00 am - 12:23 pm

STL

HLN

6h 23m

1 stop

5:45 am - 1:32 pm

HLN

STL

6h 47m

1 stop

$349Delta

Sat, May 9 - Sat, May 16

7:35 am - 12:24 pm

ORD

HLN

5h 49m

1 stop

5:45 am - 11:52 am

HLN

ORD

5h 07m

1 stop

$349Delta

Tue, May 5 - Sun, May 17

7:00 am - 12:23 pm

STL

HLN

6h 23m

1 stop

1:03 pm - 11:21 pm

HLN

STL

9h 18m

2 stops

$354Delta

Sat, May 9 - Sat, May 16

11:19 am - 10:30 pm

ORD

HLN

12h 11m

2 stops

5:40 am - 11:51 am

HLN

ORD

5h 11m

1 stop

$354Delta

Sat, Apr 18 - Tue, Apr 21

11:19 am - 10:30 pm

ORD

HLN

12h 11m

2 stops

5:40 am - 6:52 pm

HLN

ORD

12h 12m

2 stops

$359Delta

Sat, Apr 18 - Tue, Apr 21

8:00 am - 5:45 pm

ORD

HLN

10h 45m

1 stop

6:22 pm - 6:39 am

HLN

ORD

11h 17m

1 stop

$399Alaska Airlines

Wed, Apr 8 - Sun, Apr 12

2:20 pm - 9:46 pm

ORD

HLN

8h 26m

1 stop

2:30 pm - 10:58 pm

HLN

ORD

7h 28m

1 stop

$426United Airlines

Fri, May 8 - Mon, May 11

8:54 am - 1:39 pm

STL

HLN

5h 45m

1 stop

2:25 pm - 8:54 pm

HLN

STL

5h 29m

1 stop

$489United Airlines

Fri, Apr 10 - Tue, Apr 14

9:10 am - 9:33 pm

STL

HLN

13h 23m

2 stops

2:25 pm - 8:54 pm

HLN

STL

5h 29m

1 stop

$494United Airlines

Fri, Apr 10 - Tue, Apr 14

2:37 pm - 5:45 pm

STL

HLN

28h 08m

2 stops

4:43 pm - 8:54 am

HLN

STL

15h 11m

2 stops

$519Alaska Airlines

Sat, May 9 - Sat, May 16

Delta flights from Illinois to Helena

Our best Delta deals on Illinois to Helena flight tickets

Delta

May 9

STL7:00 amLambert-St Louis

6h 23m

1 stop

HLN12:23 pmHelena

May 16

HLN5:45 amHelena

6h 47m

1 stop

STL1:32 pmLambert-St Louis

$349

Delta

May 9

STL7:00 amLambert-St Louis

6h 23m

1 stop

HLN12:23 pmHelena

May 16

HLN1:03 pmHelena

9h 18m

2 stops

STL11:21 pmLambert-St Louis

$354

Delta

Apr 18

ORD11:19 amChicago O'Hare Intl

12h 11m

2 stops

HLN10:30 pmHelena

Apr 21

HLN5:40 amHelena

12h 12m

2 stops

ORD6:52 pmChicago O'Hare Intl

$359

Alaska Airlines flights from Illinois to Helena

Our best Alaska Airlines deals on Illinois to Helena flight tickets

Alaska Airlines

Apr 8

ORD8:00 amChicago O'Hare Intl

10h 45m

1 stop

HLN5:45 pmHelena

Apr 12

HLN6:22 pmHelena

11h 17m

1 stop

ORD6:39 amChicago O'Hare Intl

$399

Alaska Airlines

May 8

ORD8:48 pmChicago O'Hare Intl

21h 57m

1 stop

HLN5:45 pmHelena

May 11

HLN6:22 pmHelena

23h 41m

2 stops

ORD7:03 pmChicago O'Hare Intl

$491

Alaska Airlines

May 9

STL2:37 pmLambert-St Louis

28h 08m

2 stops

HLN5:45 pmHelena

May 16

HLN4:43 pmHelena

15h 11m

2 stops

STL8:54 amLambert-St Louis

$519

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 5/9

7:00 am-12:23 pm

1 stop6h 23m

Helena

Sat 5/16

5:45 am-1:32 pm

1 stop6h 47m

$349

Quickest round-trip

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Tue 5/5

7:35 am-12:24 pm

1 stop5h 49m

Helena

Sun 5/17

5:45 am-11:52 am

1 stop5h 07m

$349

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 5/9

7:00 am-12:23 pm

1 stop6h 23m

Helena

Sat 5/16

1:03 pm-11:21 pm

2 stops9h 18m

$354

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Sat 4/18

11:19 am-10:30 pm

2 stops12h 11m

Helena

Tue 4/21

5:40 am-11:51 am

1 stop5h 11m

$354

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Sat 4/18

11:19 am-10:30 pm

2 stops12h 11m

Helena

Tue 4/21

5:40 am-6:52 pm

2 stops12h 12m

$359

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 4/8

8:00 am-5:45 pm

1 stop10h 45m

Helena

Sun 4/12

6:22 pm-6:39 am

1 stop11h 17m

$399

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Fri 5/8

2:20 pm-9:46 pm

1 stop8h 26m

Helena

Mon 5/11

2:30 pm-10:58 pm

1 stop7h 28m

$426

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 4/10

8:54 am-1:39 pm

1 stop5h 45m

Helena

Tue 4/14

2:25 pm-8:54 pm

1 stop5h 29m

$489

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Fri 4/10

9:10 am-9:33 pm

2 stops13h 23m

Helena

Tue 4/14

2:25 pm-8:54 pm

1 stop5h 29m

$494

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Sat 5/9

2:37 pm-5:45 pm

2 stops28h 08m

Helena

Sat 5/16

4:43 pm-8:54 am

2 stops15h 11m

$519

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 Southwest 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 38m
Direct flights	None

The fastest flight from Illinois to Helena takes 5h 38m

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

Search flight deals

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.