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$158+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$388
(Delta)

One-way from

$158
(Delta)

Popular in

December

Cheapest in

September

Average price

$506
From Helena to Illinois
Search Deals
One-way flight from Helena to Illinois
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Highest demand for flights based on searches. 19% potential increase in price ($126 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Delta deal was found by Cheapflights users on 7/29. 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.
Mon 8/181:00 pmHLN - ORD
2 stops9h 56mDelta
Sat 8/237:45 amORD - HLN
1 stop5h 35mDelta
Deal found 7/29$388
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/295:20 pmHLN - ORD
1 stop5h 39mUnited Airlines
Tue 9/22:53 pmORD - HLN
1 stop7h 18mUnited Airlines
Deal found 7/29$463
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 9/154:02 pmHLN - STL
1 stop6h 57mAlaska Airlines
Thu 9/186:00 amSTL - HLN
1 stop10h 21mAlaska Airlines
Deal found 7/29$466
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 8/294:02 pmHLN - ORD
1 stop29h 02mAlaska Airlines
Tue 9/23:20 pmORD - HLN
1 stop25h 01mAlaska Airlines
Deal found 7/28$514
This Delta deal was found by Cheapflights users on 7/29. 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 8/135:50 amHLN - STL
1 stop6h 39mDelta
Sun 8/177:35 amSTL - HLN
1 stop5h 45mDelta
Deal found 7/29$589
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/135:39 pmHLN - STL
1 stop5h 20mUnited Airlines
Sun 8/175:00 amSTL - HLN
2 stops9h 58mUnited Airlines
Deal found 7/29$594
This Delta deal was found by Cheapflights users on 7/30. 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.
Fri 8/295:50 amHLN - MDW
2 stops10h 47mDelta
Tue 9/21:43 pmMDW - HLN
2 stops9h 30mDelta
Deal found 7/30$639
This United deal was found by Cheapflights users on 7/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/115:39 pmHLN - ORD
1 stop5h 51mMultiple Airlines
Fri 8/156:00 amORD - HLN
1 stop10h 31mMultiple Airlines
Deal found 7/28$817

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 July 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

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 8/18

1:00 pm-11:56 pm

2 stops9h 56m

Chicago O'Hare Intl

Sat 8/23

7:45 am-12:20 pm

1 stop5h 35m

$388

HelenaChicago

HLN - ORD

HLNORD

Helena

Fri 8/29

5:20 pm-11:59 pm

1 stop5h 39m

Chicago O'Hare Intl

Tue 9/2

2:53 pm-9:11 pm

1 stop7h 18m

$463

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Mon 9/15

4:02 pm-11:59 pm

1 stop6h 57m

Lambert-St Louis

Thu 9/18

6:00 am-3:21 pm

1 stop10h 21m

$466

HelenaChicago

HLN - ORD

HLNORD

Helena

Fri 8/29

4:02 pm-10:04 pm

1 stop29h 02m

Chicago O'Hare Intl

Tue 9/2

3:20 pm-3:21 pm

1 stop25h 01m

$514

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 8/13

5:50 am-1:29 pm

1 stop6h 39m

Lambert-St Louis

Sun 8/17

7:35 am-12:20 pm

1 stop5h 45m

$589

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Wed 8/13

5:39 pm-11:59 pm

1 stop5h 20m

Lambert-St Louis

Sun 8/17

5:00 am-1:58 pm

2 stops9h 58m

$594

HelenaChicago

HLN - MDW

HLNMDW

Helena

Fri 8/29

5:50 am-5:37 pm

2 stops10h 47m

Chicago Midway

Tue 9/2

1:43 pm-10:13 pm

2 stops9h 30m

$639

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 8/11

5:39 pm-12:30 am

1 stop5h 51m

Chicago O'Hare Intl

Fri 8/15

6:00 am-3:31 pm

1 stop10h 31m

$817

HelenaChicago

HLN - ORD

HLNORD

Helena

Tue 8/19

1:00 pm-10:04 pm

1 stop8h 04m

$158

HelenaChicago

HLN - MDW

HLNMDW

Helena

Wed 8/20

5:50 am-6:37 pm

2 stops11h 47m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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, 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 July 30, 2025.
Read reviews from past customers who have flown Alaska Airlines, 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 Delta, with whom users have recently found tickets for as low as $158. However, be on the lookout for offers from Alaska 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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Alternative routes for Helena to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$314Average$456FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$404Average$768FlexibilityNo cancel feeOn-time69%

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