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$242+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 12/46:28 pmHLN - STL
1 stop18h 59mAlaska Airlines
Tue 12/167:00 amSTL - HLN
1 stop11h 51mAlaska Airlines
Deal found 10/29$434
This Alaska Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 11/227:32 pmHLN - ORD
1 stop9h 56mAlaska Airlines
Fri 11/286:00 amORD - HLN
1 stop13h 52mAlaska Airlines
Deal found 10/30$460
This Delta deal was found by Cheapflights users on 10/29. 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.
Thu 12/45:30 amHLN - STL
2 stops9h 36mDelta
Tue 12/166:30 amSTL - HLN
1 stop6h 55mDelta
Deal found 10/29$482
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/262:22 pmHLN - ORD
1 stop5h 36mUnited Airlines
Wed 12/38:45 amORD - HLN
1 stop6h 02mUnited Airlines
Deal found 10/29$494
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 12/42:30 pmHLN - STL
3 stops24h 10mUnited Airlines
Tue 12/1610:00 amSTL - HLN
2 stops12h 22mUnited Airlines
Deal found 10/29$536
This Delta deal was found by Cheapflights users on 10/29. 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.
Fri 11/141:06 pmHLN - STL
2 stops9h 17mDelta
Tue 11/186:34 amSTL - HLN
1 stop6h 52mDelta
Deal found 10/29$574
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/262:26 pmHLN - STL
1 stop6h 56mUnited Airlines
Fri 1/29:00 amSTL - HLN
1 stop5h 45mUnited Airlines
Deal found 10/28$669
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Fri 11/142:22 pmHLN - STL
3 stops24h 24mUnited Airlines
Tue 11/1812:31 pmSTL - HLN
2 stops9h 51mUnited Airlines
Deal found 10/29$712
This Delta deal was found by Cheapflights users on 10/30. 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.
Sat 11/225:30 amHLN - ORD
2 stops8h 34mDelta
Fri 11/281:29 pmORD - HLN
2 stops10h 01mDelta
Deal found 10/30$829

Cheap flight deals from Helena to Illinois

Keep the following information in mind while searching for Helena to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$338
(Alaska Airlines)

One-way from

$242
(Alaska Airlines)

Popular in

June

Cheapest in

September

Average price

$434
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 ($243 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 30, 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

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 2/28

4:10 pm-11:56 pm

1 stop6h 46m

Lambert-St Louis

Tue 3/3

7:00 am-3:43 pm

1 stop9h 43m

$338

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 2/28

5:35 am-4:50 pm

2 stops10h 15m

Lambert-St Louis

Tue 3/3

5:00 pm-10:38 pm

1 stop6h 38m

$344

HelenaMoline

HLN - MLI

HLNMLI

Helena

Tue 2/3

2:27 pm-9:16 pm

1 stop5h 49m

Moline Quad-City

Sat 2/7

10:47 am-9:26 pm

2 stops11h 39m

$344

HelenaChicago

HLN - ORD

HLNORD

Helena

Sun 3/1

4:10 pm-5:04 am

1 stop11h 54m

Chicago O'Hare Intl

Wed 3/4

7:45 am-3:43 pm

1 stop8h 58m

$382

HelenaChicago

HLN - ORD

HLNORD

Helena

Sun 3/1

4:10 pm-11:59 pm

1 stop6h 49m

Chicago O'Hare Intl

Thu 3/5

7:45 am-3:43 pm

1 stop8h 58m

$402

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Thu 12/4

6:28 pm-2:27 pm

1 stop18h 59m

Lambert-St Louis

Tue 12/16

7:00 am-5:51 pm

1 stop11h 51m

$434

HelenaChicago

HLN - ORD

HLNORD

Helena

Sat 11/22

7:32 pm-6:28 am

1 stop9h 56m

Chicago O'Hare Intl

Fri 11/28

6:00 am-6:52 pm

1 stop13h 52m

$460

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Thu 12/4

5:30 am-4:06 pm

2 stops9h 36m

Lambert-St Louis

Tue 12/16

6:30 am-12:25 pm

1 stop6h 55m

$482

HelenaChicago

HLN - ORD

HLNORD

Helena

Wed 11/26

2:22 pm-8:58 pm

1 stop5h 36m

Chicago O'Hare Intl

Wed 12/3

8:45 am-1:47 pm

1 stop6h 02m

$494

HelenaChicago

HLN - MDW

HLNMDW

Helena

Fri 2/27

12:50 pm-3:25 pm

2 stops25h 35m

Chicago Midway

Tue 3/3

10:35 am-10:38 pm

2 stops13h 03m

$548

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 12 results
1
2

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 December is currently the most expensive (average of $312). 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 October 30, 2025.
Read reviews from past customers who have flown Delta and United Airlines from Helena to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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, Delta, and United Airlines fly from Helena to Illinois in about 5h 49m. The time it takes to get you to your destination can typically vary by up to 4h 26m. 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 - Chicago Midway or Helena - Lambert-St Louis.

  • 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 December is currently the most expensive (average of $312). 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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Top 2 airlines flying from Helena to Illinois

Discover the top 2 airlines that operate flights from Helena to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$311Average$529FlexibilityNo cancel feeOn-time69%
DeltaCheapest$314Average$354FlexibilityNo cancel feeOn-timeN/A

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