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$145+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
feb. 28 — mar. 71
sáb. 2/28
sáb. 3/7
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 enero 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.
vie. 3/202:30 pm
HLN
-
ORD
1 stop8h 22m
United Airlines
mar. 3/247:00 am
ORD
-
HLN
1 stop7h 38m
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.
jue. 3/192:30 pm
HLN
-
ORD
1 stop5h 59m
United Airlines
mié. 3/252:01 pm
ORD
-
HLN
1 stop8h 24m
United Airlines
Deal found 1/27$314
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/142:25 pm
HLN
-
ORD
1 stop8h 34m
United Airlines
mar. 2/177:10 am
ORD
-
HLN
1 stop7h 30m
United Airlines
Deal found 1/26$339
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/26:48 pm
HLN
-
ORD
1 stop18h 50m
Alaska Airlines
lun. 2/96:06 pm
ORD
-
HLN
1 stop25h 05m
Alaska Airlines
Deal found 1/26$374
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.
mié. 5/202:30 pm
HLN
-
ORD
1 stop7h 28m
United Airlines
sáb. 5/232:33 pm
ORD
-
HLN
1 stop7h 32m
United Airlines
Deal found 1/28$383
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.
mié. 2/42:27 pm
HLN
-
ORD
1 stop5h 48m
United Airlines
lun. 2/97:00 am
ORD
-
HLN
1 stop7h 41m
United Airlines
Deal found 1/28$409
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.
jue. 2/51:10 pm
HLN
-
ORD
1 stop7h 42m
Delta
mar. 2/101:58 pm
ORD
-
HLN
2 stops9h 31m
Delta
Deal found 1/28$414
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/35:30 am
HLN
-
MDW
2 stops12h 06m
Delta
sáb. 2/710:53 am
MDW
-
HLN
2 stops12h 36m
Delta
Deal found 1/27$420
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 3/65:30 am
HLN
-
ORD
1 stop5h 49m
Delta
dom. 3/87:20 am
ORD
-
HLN
1 stop6h 01m
Delta
Deal found 1/26$429
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.
vie. 3/206:22 pm
HLN
-
ORD
1 stop28h 37m
Alaska Airlines
mar. 3/244:10 pm
ORD
-
HLN
2 stops26h 35m
Alaska Airlines
Deal found 1/28$438
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 1/312:27 pm
HLN
-
STL
1 stop5h 31m
United Airlines
mar. 2/34:15 pm
STL
-
HLN
1 stop6h 11m
United Airlines
Deal found 1/26$439
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.
mar. 2/32:27 pm
HLN
-
ORD
1 stop5h 49m
United Airlines
dom. 2/81:55 pm
ORD
-
HLN
1 stop8h 31m
United Airlines
Deal found 1/28$439

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 enero 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(United Airlines)

One-way from

$145
(Delta)

Popular in

June

Cheapest in

September

Average price

$463
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 January 2026
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 enero 29, 2026.
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

vie. 3/20

2:30 pm-11:52 pm

1 stop8h 22m

Chicago O'Hare Intl

mar. 3/24

7:00 am-1:38 pm

1 stop7h 38m

$289

HelenaChicago

HLN - ORD

HLNORD

Helena

sáb. 2/14

2:25 pm-11:59 pm

1 stop8h 34m

Chicago O'Hare Intl

mar. 2/17

7:10 am-1:40 pm

1 stop7h 30m

$339

HelenaChicago

HLN - ORD

HLNORD

Helena

mié. 5/20

2:30 pm-10:58 pm

1 stop7h 28m

Chicago O'Hare Intl

sáb. 5/23

2:33 pm-9:05 pm

1 stop7h 32m

$383

HelenaChicago

HLN - ORD

HLNORD

Helena

lun. 5/11

6:22 pm-6:40 am

1 stop11h 18m

Chicago O'Hare Intl

jue. 5/14

7:45 pm-4:06 pm

1 stop21h 21m

$429

HelenaChicago

HLN - ORD

HLNORD

Helena

vie. 3/6

5:30 am-12:19 pm

1 stop5h 49m

Chicago O'Hare Intl

dom. 3/8

7:20 am-12:21 pm

1 stop6h 01m

$429

HelenaChicago

HLN - ORD

HLNORD

Helena

vie. 3/20

6:22 pm-11:59 pm

1 stop28h 37m

Chicago O'Hare Intl

mar. 3/24

4:10 pm-5:45 pm

2 stops26h 35m

$438

HelenaChicago

HLN - ORD

HLNORD

Helena

jue. 3/19

6:22 pm-6:39 am

1 stop11h 17m

Chicago O'Hare Intl

mié. 3/25

8:20 am-5:45 pm

2 stops34h 25m

$456

HelenaChicago

HLN - MDW

HLNMDW

Helena

vie. 3/20

5:30 am-5:54 pm

2 stops11h 24m

Chicago Midway

mar. 3/24

1:10 pm-10:30 pm

2 stops10h 20m

$950

HelenaChicago

HLN - MDW

HLNMDW

Helena

vie. 7/24

5:45 am-6:31 pm

2 stops11h 46m

Chicago Midway

lun. 7/27

1:00 pm-10:34 pm

2 stops10h 34m

$1,000

HelenaChicago

HLN - MDW

HLNMDW

Helena

jue. 3/19

5:30 am-5:54 pm

2 stops11h 24m

Chicago Midway

mié. 3/25

1:10 pm-10:30 pm

2 stops10h 20m

$1,138

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 33 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 enero 29, 2026.
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
9,215 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Food

6.6

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
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Food

6.6

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 United Airlines and Delta fly from Helena to Illinois in about 8h 22m. The time it takes to get you to your destination can typically vary by up to 3h 02m. There are 1227 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 - Chicago Midway 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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