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$244+ 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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$346
(Alaska Airlines)

One-way from

$244
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$701
From Helena to Illinois
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One-way flight from Helena to Illinois
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Highest demand for flights based on searches. 19% potential increase in price ($133 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/12. 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 8/294:02 pmHLN - ORD
1 stop14h 01mAlaska Airlines
Tue 9/28:00 amORD - HLN
1 stop8h 21mAlaska Airlines
Deal found 6/12$346
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/184:09 pmHLN - ORD
1 stop6h 50mHawaiian Airlines
Sat 8/236:20 amORD - HLN
1 stop10h 01mHawaiian Airlines
Deal found 6/11$377
This Delta deal was found by Cheapflights users on 6/11. 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 8/181:00 pmHLN - ORD
1 stop8h 04mDelta
Sat 8/236:10 amORD - HLN
2 stops7h 10mDelta
Deal found 6/11$383
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/135:39 pmHLN - ORD
1 stop5h 51mUnited Airlines
Mon 8/187:40 pmORD - HLN
2 stops18h 50mUnited Airlines
Deal found 6/10$432
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/182:34 pmHLN - STL
1 stop6h 16mUnited Airlines
Thu 8/219:00 amSTL - HLN
1 stop8h 04mUnited Airlines
Deal found 6/10$474
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 8/184:09 pmHLN - STL
1 stop6h 50mAlaska Airlines
Thu 8/215:15 amSTL - HLN
2 stops11h 06mAlaska Airlines
Deal found 6/10$586
This Delta deal was found by Cheapflights users on 6/12. 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 8/185:50 amHLN - MDW
2 stops10h 47mDelta
Sat 8/231:08 pmMDW - HLN
2 stops10h 05mDelta
Deal found 6/12$784
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/245:39 pmHLN - MLI
1 stop26h 28mUnited Airlines
Sun 7/279:05 amMLI - HLN
1 stop5h 53mUnited Airlines
Deal found 6/10$794
This Delta deal was found by Cheapflights users on 6/11. 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.
Wed 6/185:44 amHLN - STL
1 stop6h 46mDelta
Tue 6/247:15 amSTL - HLN
1 stop6h 12mDelta
Deal found 6/11$831

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 June 12, 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

Fri 8/29

4:02 pm-7:03 am

1 stop14h 01m

Chicago O'Hare Intl

Tue 9/2

8:00 am-3:21 pm

1 stop8h 21m

$346

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 8/18

4:09 pm-11:59 pm

1 stop6h 50m

Chicago O'Hare Intl

Sat 8/23

6:20 am-3:21 pm

1 stop10h 01m

$377

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 8/18

1:00 pm-10:04 pm

1 stop8h 04m

Chicago O'Hare Intl

Sat 8/23

6:10 am-12:20 pm

2 stops7h 10m

$383

HelenaChicago

HLN - ORD

HLNORD

Helena

Wed 8/13

5:39 pm-12:30 am

1 stop5h 51m

Chicago O'Hare Intl

Mon 8/18

7:40 pm-1:30 pm

2 stops18h 50m

$432

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Mon 8/18

2:34 pm-9:50 pm

1 stop6h 16m

Lambert-St Louis

Thu 8/21

9:00 am-4:04 pm

1 stop8h 04m

$474

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Mon 8/18

4:09 pm-11:59 pm

1 stop6h 50m

Lambert-St Louis

Thu 8/21

5:15 am-3:21 pm

2 stops11h 06m

$586

HelenaChicago

HLN - MDW

HLNMDW

Helena

Mon 8/18

5:50 am-5:37 pm

2 stops10h 47m

Chicago Midway

Sat 8/23

1:08 pm-10:13 pm

2 stops10h 05m

$784

HelenaMoline

HLN - MLI

HLNMLI

Helena

Thu 7/24

5:39 pm-9:07 pm

1 stop26h 28m

Moline Quad-City

Sun 7/27

9:05 am-1:58 pm

1 stop5h 53m

$794

HelenaChicago

HLN - ORD

HLNORD

Helena

Sat 7/19

4:09 pm-5:40 am

1 stop12h 31m

$244

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Mon 6/23

4:09 pm-11:59 pm

1 stop6h 50m

$415

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 15 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, 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 June 12, 2025.
See what other customers who have flown with Alaska Airlines, Delta and Hawaiian Airlines from Helena to Illinois have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines to fly from Helena to Illinois one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $244. However, be on the lookout for offers from Hawaiian Airlines and United Airlines, as they are both options that can get you from Helena to Illinois for a low price.

  • 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, 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$314Average$524FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$404Average$756FlexibilityNo cancel feeOn-time69%

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