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$264+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$264
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$415
Provider with most accurate pricing for Helena-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Helena-Chicago (CHI) flights.
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From Helena to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($130 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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 5/216:25 amHLN - MLI
2 stops9h 21mUnited Airlines
Fri 5/309:05 amMLI - HLN
1 stop5h 57mUnited Airlines
Deal found 4/29$264
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 8/184:08 pmHLN - ORD
1 stop29h 22mAlaska Airlines
Sat 8/236:20 amORD - HLN
1 stop10h 01mAlaska Airlines
Deal found 4/29$396
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Sat 5/315:39 pmHLN - STL
1 stop5h 20mUnited Airlines
Fri 6/64:32 pmSTL - HLN
1 stop5h 43mUnited Airlines
Deal found 4/29$417
This Delta deal was found by Cheapflights users on 4/29. 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 8/71:00 pmHLN - ORD
1 stop8h 08mDelta
Thu 8/147:15 amORD - HLN
1 stop6h 20mDelta
Deal found 4/29$512
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Wed 6/184:09 pmHLN - STL
1 stop6h 50mAlaska Airlines
Tue 6/247:32 pmSTL - HLN
1 stop20h 59mAlaska Airlines
Deal found 4/28$536
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 6/185:44 amHLN - STL
2 stops12h 00mDelta
Tue 6/243:57 pmSTL - HLN
2 stops8h 01mDelta
Deal found 4/29$678
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Mon 5/122:16 pmHLN - ORD
1 stop18h 17mUnited Airlines
Sun 5/187:10 amORD - HLN
1 stop15h 05mUnited Airlines
Deal found 4/28$681
This Delta deal was found by Cheapflights users on 4/29. 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 8/75:50 amHLN - MDW
2 stops11h 50mDelta
Thu 8/1410:35 amMDW - HLN
2 stops12h 58mDelta
Deal found 4/29$693

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 April 29, 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

HelenaMoline

HLN - MLI

HLNMLI

Helena

Wed 5/21

6:25 am-4:46 pm

2 stops9h 21m

Moline Quad-City

Fri 5/30

9:05 am-2:02 pm

1 stop5h 57m

$264

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 8/18

4:08 pm-10:30 pm

1 stop29h 22m

Chicago O'Hare Intl

Sat 8/23

6:20 am-3:21 pm

1 stop10h 01m

$396

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 5/31

5:39 pm-11:59 pm

1 stop5h 20m

Lambert-St Louis

Fri 6/6

4:32 pm-9:15 pm

1 stop5h 43m

$417

HelenaChicago

HLN - ORD

HLNORD

Helena

Thu 8/7

1:00 pm-10:08 pm

1 stop8h 08m

Chicago O'Hare Intl

Thu 8/14

7:15 am-12:35 pm

1 stop6h 20m

$512

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 6/18

4:09 pm-11:59 pm

1 stop6h 50m

Lambert-St Louis

Tue 6/24

7:32 pm-3:31 pm

1 stop20h 59m

$536

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 6/18

5:44 am-6:44 pm

2 stops12h 00m

Lambert-St Louis

Tue 6/24

3:57 pm-10:58 pm

2 stops8h 01m

$678

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 5/12

2:16 pm-9:33 am

1 stop18h 17m

Chicago O'Hare Intl

Sun 5/18

7:10 am-9:15 pm

1 stop15h 05m

$681

HelenaChicago

HLN - MDW

HLNMDW

Helena

Thu 8/7

5:50 am-6:40 pm

2 stops11h 50m

Chicago Midway

Thu 8/14

10:35 am-10:33 pm

2 stops12h 58m

$693

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Mon 6/23

2:39 pm-12:46 pm

1 stop21h 07m

$285

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 5/12

7:29 pm-6:05 am

1 stop9h 36m

$323

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 13 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 April 29, 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
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

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
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

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
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

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
2,405 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

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 United Airlines, with whom users have recently found tickets for as low as $285. However, be on the lookout for offers from Hawaiian Airlines and Alaska 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$314Average$524FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$404Average$756FlexibilityNo cancel feeOn-time69%

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