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Helena

$145+ Cheap flights from Illinois to Helena (HLN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — HLN
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Illinois to Helena

Cheapest flights from Illinois to Helena
Explore the most affordable flight options available from Illinois to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:45 pm
STL
-
HLN
1 stop7h 31m
United Airlines
Sat 2/282:25 pm
HLN
-
STL
1 stop5h 01m
United Airlines
Deal found 1/28$289
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:30 pm
ORD
-
HLN
1 stop8h 03m
United Airlines
Sat 5/22:30 pm
HLN
-
ORD
1 stop7h 28m
United Airlines
Deal found 1/27$289
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:40 am
ORD
-
HLN
1 stop6h 00m
United Airlines
Fri 3/62:30 pm
HLN
-
ORD
1 stop7h 25m
United Airlines
Deal found 1/28$309
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/234:30 pm
STL
-
HLN
1 stop5h 46m
United Airlines
Sat 2/282:25 pm
HLN
-
STL
1 stop5h 01m
United Airlines
Deal found 1/28$314
This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/177:00 am
ORD
-
HLN
1 stop9h 59m
Alaska Airlines
Tue 2/244:36 pm
HLN
-
ORD
1 stop20h 35m
Alaska Airlines
Deal found 1/28$314
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:45 am
ORD
-
HLN
1 stop5h 56m
United Airlines
Sun 2/152:25 pm
HLN
-
ORD
1 stop6h 04m
United Airlines
Deal found 1/27$339
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2310:13 am
STL
-
HLN
2 stops13h 14m
Delta
Sat 2/281:10 pm
HLN
-
STL
1 stop7h 28m
Delta
Deal found 1/28$349
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/232:02 pm
ORD
-
HLN
1 stop8h 14m
United Airlines
Sat 2/282:25 pm
HLN
-
ORD
1 stop6h 04m
United Airlines
Deal found 1/28$349
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/232:05 pm
ORD
-
HLN
2 stops9h 22m
Delta
Sat 2/281:10 pm
HLN
-
ORD
1 stop7h 42m
Delta
Deal found 1/28$379
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/232:07 pm
ORD
-
HLN
2 stops26h 52m
Alaska Airlines
Sat 2/284:36 pm
HLN
-
ORD
2 stops30h 23m
Alaska Airlines
Deal found 1/28$414
This Alaska Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:12 am
STL
-
HLN
2 stops11h 47m
Alaska Airlines
Sat 2/284:36 pm
HLN
-
STL
2 stops15h 19m
Alaska Airlines
Deal found 1/26$466
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/177:30 pm
STL
-
HLN
1 stop21h 52m
Alaska Airlines
Fri 7/244:59 pm
HLN
-
STL
1 stop20h 03m
Alaska Airlines
Deal found 1/28$509

Find flight deals from Illinois to Helena

Keep the following information in mind while searching for Illinois to Helena flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(United Airlines)

One-way from

$145
(Expedia)
Provider with most accurate pricing for Chicago (CHI)-Helena flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Helena flights.
Search Deals
From Illinois to Helena
Search Deals
One-way flight from Illinois to Helena
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Helena that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Illinois to Helena that are best for you.

Fly from

Illinois

Fly to

Helena

Route

Depart

Return

Price

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 2/23

7:00 am-3:59 pm

1 stop9h 59m

Helena

Sat 2/28

4:36 pm-2:23 pm

1 stop20h 47m

$289

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/25

2:45 pm-9:16 pm

1 stop7h 31m

Helena

Sat 2/28

2:25 pm-8:26 pm

1 stop5h 01m

$289

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 4/29

2:10 pm-9:33 pm

1 stop8h 23m

Helena

Sat 5/2

2:30 pm-10:58 pm

1 stop7h 28m

$289

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 3/4

8:40 am-1:40 pm

1 stop6h 00m

Helena

Fri 3/6

2:30 pm-10:55 pm

1 stop7h 25m

$309

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Tue 2/17

7:00 am-3:59 pm

1 stop9h 59m

Helena

Tue 2/24

4:36 pm-2:11 pm

1 stop20h 35m

$314

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Wed 2/11

8:45 am-1:41 pm

1 stop5h 56m

Helena

Sun 2/15

2:25 pm-9:29 pm

1 stop6h 04m

$339

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Mon 2/23

10:13 am-10:27 pm

2 stops13h 14m

Helena

Sat 2/28

1:10 pm-9:38 pm

1 stop7h 28m

$349

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Mon 2/23

2:02 pm-9:16 pm

1 stop8h 14m

Helena

Sat 2/28

2:25 pm-9:29 pm

1 stop6h 04m

$349

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

Mon 2/23

2:05 pm-10:27 pm

2 stops9h 22m

Helena

Sat 2/28

1:10 pm-9:52 pm

1 stop7h 42m

$379

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

Wed 2/25

5:12 am-3:59 pm

2 stops11h 47m

Helena

Sat 2/28

4:36 pm-8:55 am

2 stops15h 19m

$466

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 24 results
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Best time to book a flight from Illinois to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Helena

What is the cheapest month to book a flight from Illinois to Helena?

Currently, October is the cheapest month in which you can book a flight from Illinois to Helena (average of $190). Flying from Illinois to Helena in March is currently the most expensive (average of $289). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Helena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Helena from Illinois?

    For a flight from Illinois to Helena, you will be flying into Helena. Helena (HLN) is just 2.7 mi from the center of the city.

  • How long is the flight from Illinois to Helena?

    A quick flight from Illinois to Helena can take about 7h 31m. Alaska Airlines provides one of the quickest options available for as low as $289. The distance between Illinois and Helena is about 1218 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Illinois to Helena?

    When deciding which route to take from Illinois to Helena consider Lambert-St Louis - Helena, Chicago O'Hare Intl - Helena or Greater Peoria - Helena as they are the most popular.

  • Can I find deals for flights from Illinois to Helena that include hotel bookings?

    Yes. In addition to deals on Illinois to Helena flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Helena?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Helena.

  • Can I find deals for business class flights from Illinois to Helena?

    Yes. Cheapflights offers flight deals from Illinois to Helena by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Helena?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Helena (average of $190). Flying from Illinois to Helena in March is currently the most expensive (average of $289). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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