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$380+ Cheap flights from Helena (HLN) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$380
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$202
From Helena to Illinois
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($130 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 15, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 10/216:18 pmHLN - ORD
1 stop11h 06mAlaska Airlines
Thu 10/238:00 amORD - HLN
1 stop10h 41mAlaska Airlines
Deal found 9/14$380
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 10/75:18 pmHLN - STL
1 stop5h 40mUnited Airlines
Tue 10/144:50 pmSTL - HLN
1 stop5h 10mUnited Airlines
Deal found 9/13$389
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 10/76:18 pmHLN - STL
1 stop28h 45mAlaska Airlines
Tue 10/146:33 amSTL - HLN
1 stop12h 08mAlaska Airlines
Deal found 9/14$405
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 10/146:18 pmHLN - ORD
1 stop11h 06mAlaska Airlines
Sat 10/188:00 amORD - HLN
1 stop10h 41mAlaska Airlines
Deal found 9/13$415
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/155:18 pmHLN - ORD
1 stop5h 41mUnited Airlines
Sat 10/1810:53 amORD - HLN
1 stop6h 47mUnited Airlines
Deal found 9/13$433
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 10/136:18 pmHLN - STL
1 stop28h 45mAlaska Airlines
Wed 10/153:57 pmSTL - HLN
1 stop26h 44mAlaska Airlines
Deal found 9/14$435
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/175:18 pmHLN - ORD
1 stop5h 41mUnited Airlines
Tue 10/212:17 pmORD - HLN
1 stop7h 43mUnited Airlines
Deal found 9/13$461
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 10/142:44 pmHLN - ORD
1 stop6h 55mUnited Airlines
Mon 10/205:01 amORD - HLN
1 stop12h 39mUnited Airlines
Deal found 9/13$464
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 10/146:18 pmHLN - ORD
1 stop11h 06mAlaska Airlines
Fri 10/176:00 amORD - HLN
1 stop12h 41mAlaska Airlines
Deal found 9/13$469
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 10/142:44 pmHLN - ORD
1 stop6h 55mUnited Airlines
Sun 10/195:01 amORD - HLN
1 stop16h 59mUnited Airlines
Deal found 9/13$484
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/175:18 pmHLN - ORD
1 stop5h 41mUnited Airlines
Mon 10/205:01 amORD - HLN
1 stop12h 39mUnited Airlines
Deal found 9/13$492
This Delta deal was found by Cheapflights users on 9/13. 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 10/171:00 pmHLN - ORD
2 stops20h 20mDelta
Tue 10/217:50 amORD - HLN
1 stop5h 30mDelta
Deal found 9/13$494

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 September 15, 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

Tue 10/7

5:18 pm-11:58 pm

1 stop5h 40m

Lambert-St Louis

Tue 10/14

4:50 pm-9:00 pm

1 stop5h 10m

$389

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Tue 10/7

6:18 pm-12:03 am

1 stop28h 45m

Lambert-St Louis

Tue 10/14

6:33 am-5:41 pm

1 stop12h 08m

$405

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

$409

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

$433

HelenaChicago

HLN - ORD

HLNORD

Helena

Wed 10/15

5:18 pm-11:59 pm

1 stop5h 41m

Chicago O'Hare Intl

Sat 10/18

10:53 am-4:40 pm

1 stop6h 47m

$433

HelenaChicago

HLN - ORD

HLNORD

Helena

Tue 10/14

5:18 pm-11:59 pm

1 stop5h 41m

Chicago O'Hare Intl

Tue 10/21

2:53 pm-9:00 pm

1 stop7h 07m

$433

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Mon 10/13

6:18 pm-12:03 am

1 stop28h 45m

Lambert-St Louis

Wed 10/15

3:57 pm-5:41 pm

1 stop26h 44m

$435

HelenaChicago

HLN - ORD

HLNORD

Helena

Fri 10/17

5:18 pm-11:59 pm

1 stop5h 41m

Chicago O'Hare Intl

Tue 10/21

2:17 pm-9:00 pm

1 stop7h 43m

$461

HelenaChicago

HLN - ORD

HLNORD

Helena

Wed 10/15

5:18 pm-11:59 pm

1 stop5h 41m

Chicago O'Hare Intl

Mon 10/20

5:01 am-4:40 pm

1 stop12h 39m

$464

HelenaChicago

HLN - ORD

HLNORD

Helena

Tue 10/14

2:44 pm-10:39 pm

1 stop6h 55m

Chicago O'Hare Intl

Mon 10/20

5:01 am-4:40 pm

1 stop12h 39m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 23 results
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2
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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, August is the cheapest month in which you can book a flight from Helena to Illinois (average of $245). Flying from Helena to Illinois in March is currently the most expensive (average of $321). 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 September 15, 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
8.0
Very good
7,956 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,956 reviews
Delta
8.0
Very good
7,956 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,931 reviews
Delta
8.0
Very good
7,956 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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, Alaska Airlines, and Hawaiian Airlines fly from Helena to Illinois in about 5h 40m. The time it takes to get you to your destination can typically vary by up to 23h 05m. There are 1218 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 - Chicago Midway.

  • 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, August is the cheapest month in which you can book a flight from Helena to Illinois (average of $245). Flying from Helena to Illinois in March is currently the most expensive (average of $321). 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$311Average$791FlexibilityNo cancel feeOn-time69%
DeltaCheapest$314Average$354FlexibilityNo cancel feeOn-timeN/A

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