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$167+ Cheap flights from Helena (HLN) to Illinois

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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Helena to Illinois

Cheapest flights from Helena to Illinois
Explore the most affordable flight options available from Helena to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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 12/316:10 amHLN - ORD
1 stop7h 45mUnited Airlines
Sun 1/47:10 amORD - HLN
1 stop7h 35mUnited Airlines
Deal found 12/16$582
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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 12/316:32 pmHLN - ORD
1 stop28h 27mAlaska Airlines
Sun 1/47:00 amORD - HLN
2 stops11h 55mAlaska Airlines
Deal found 12/16$993

Find flight deals from Helena to Illinois

Keep the following information in mind while searching for Helena to Illinois flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$347
(Alaska Airlines)

One-way from

$167
(Delta)

Popular in

June

Cheapest in

September

Average price

$424
Provider with most accurate pricing for Helena-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Helena-Chicago (CHI) flights.
Search Deals
From Helena to Illinois
Search Deals
One-way flight from Helena to Illinois
Search Deals
Highest demand for flights based on searches. 35% potential increase in price ($247 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Helena to Illinois 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 December 18, 2025.
Use the filters below to find and compare flights from Helena to Illinois that are best for you.

Fly from

Helena

Fly to

Illinois

Route

Depart

Return

Price

HelenaChicago

HLN - ORD

HLNORD

Helena

Sat 1/31

6:48 pm-11:50 pm

1 stop28h 02m

Chicago O'Hare Intl

Sat 2/7

8:00 am-6:11 pm

1 stop11h 11m

$347

HelenaChicago

HLN - ORD

HLNORD

Helena

Sat 2/14

4:36 pm-4:33 pm

1 stop22h 57m

Chicago O'Hare Intl

Wed 2/18

7:00 am-3:59 pm

1 stop9h 59m

$347

HelenaMoline

HLN - MLI

HLNMLI

Helena

Sat 1/24

2:27 pm-8:34 pm

1 stop5h 07m

Moline Quad-City

Wed 1/28

8:46 am-1:41 pm

1 stop5h 55m

$359

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 1/28

6:48 pm-1:54 pm

1 stop18h 06m

Lambert-St Louis

Sat 1/31

6:19 pm-6:11 pm

1 stop24h 52m

$402

HelenaChicago

HLN - ORD

HLNORD

Helena

Sat 3/14

2:30 pm-11:52 pm

1 stop8h 22m

Chicago O'Hare Intl

Thu 3/19

7:00 am-1:38 pm

1 stop7h 38m

$459

HelenaChicago

HLN - ORD

HLNORD

Helena

Sat 3/14

12:59 pm-9:34 pm

1 stop7h 35m

Chicago O'Hare Intl

Thu 3/19

9:43 am-10:35 pm

2 stops13h 52m

$494

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 1/28

6:15 am-4:03 pm

2 stops8h 48m

Lambert-St Louis

Sat 1/31

8:45 am-9:26 pm

1 stop13h 41m

$546

HelenaChicago

HLN - MDW

HLNMDW

Helena

Sat 1/31

5:30 am-4:16 pm

2 stops9h 46m

Chicago Midway

Sat 2/7

10:53 am-10:29 pm

2 stops12h 36m

$689

HelenaChicago

HLN - MDW

HLNMDW

Helena

Sat 3/14

5:30 am-3:25 pm

2 stops8h 55m

Chicago Midway

Thu 3/19

10:49 am-10:35 pm

2 stops12h 46m

$859

HelenaChicago

HLN - ORD

HLNORD

Helena

Sat 1/17

1:10 pm-9:52 pm

1 stop7h 42m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 27 results
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Best time to book a flight from Helena to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Helena 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 Helena to Illinois

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

Currently, October is the cheapest month in which you can book a flight from Helena to Illinois (average of $169). Flying from Helena to Illinois in November is currently the most expensive (average of $298). 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.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated December 18, 2025.
Read reviews from past customers who have flown United Airlines from Helena to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,091 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from Helena to Illinois. 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 from for flights from Helena to Illinois?

    Helena (HLN), located 2.7 mi from the city center, is the airport you fly out of when you book flights from Helena to Illinois.

  • How long is the flight from Helena to Illinois?

    Airlines like Alaska Airlines, United Airlines, and Delta fly from Helena to Illinois in about 5h 07m. The time it takes to get you to your destination can typically vary by up to 22h 55m. There are 1120 mi between Helena and Illinois. This flight may include one or multiple stops.

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

    The most popular route from Helena to Illinois is Helena - Chicago O'Hare Intl. You may also consider Helena - Lambert-St Louis or Helena - Moline Quad-City.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Helena to Illinois 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 Helena to Illinois?

    Currently, October is the cheapest month in which you can book a flight from Helena to Illinois (average of $169). Flying from Helena to Illinois in November is currently the most expensive (average of $298). 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.

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