$158 Find Cheap Flights from Helena to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to Illinois departing on 8/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to Illinois, as well as popular online travel agencies
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Cheap Flights from Helena to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago2 stops$388
St. Louis
St. Louis1 stop$466
Chicago
Chicago2 stops$388
St. Louis
St. Louis1 stop$466

Book Cheap Helena to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Helena to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helena to Illinois

Mon, Aug 18 - Sat, Aug 23
Delta Logo
1:00 pm - 11:56 pmHLN-ORD
9h 56m2 stops
Delta Logo
7:45 am - 12:20 pmORD-HLN
5h 35m1 stop
$388Delta
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Mon, Aug 18 - Sat, Aug 23
Delta Logo
1:00 pm - 11:56 pmHLN-ORD
9h 56m2 stops
Delta Logo
3:50 pm - 10:13 pmORD-HLN
7h 23m2 stops
$393Delta
Find Deal
Fri, Aug 29 - Tue, Sep 2
United Airlines Logo
5:20 pm - 11:59 pmHLN-ORD
5h 39m1 stop
United Airlines Logo
10:56 am - 4:04 pmORD-HLN
6h 08m1 stop
$405United Airlines
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Fri, Aug 29 - Tue, Sep 2
United Airlines Logo
5:20 pm - 11:59 pmHLN-ORD
5h 39m1 stop
United Airlines Logo
2:53 pm - 9:11 pmORD-HLN
7h 18m1 stop
$463United Airlines
Find Deal
Mon, Sep 15 - Thu, Sep 18
Alaska Airlines Logo
4:02 pm - 11:59 pmHLN-STL
6h 57m1 stop
Alaska Airlines Logo
6:00 am - 3:21 pmSTL-HLN
10h 21m1 stop
$466Alaska Airlines
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Mon, Oct 6 - Thu, Oct 9
Alaska Airlines Logo
6:18 pm - 12:03 amHLN-STL
28h 45m1 stop
Alaska Airlines Logo
3:57 pm - 5:41 pmSTL-HLN
26h 44m1 stop
$472Alaska Airlines
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Mon, Aug 18 - Sat, Aug 23
United Airlines Logo
5:39 pm - 9:40 amHLN-ORD
15h 01m1 stop
United Airlines Logo
8:49 am - 4:04 pmORD-HLN
8h 15m1 stop
$491United Airlines
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Mon, Aug 18 - Sat, Aug 23
United Airlines Logo
5:39 pm - 9:40 amHLN-ORD
15h 01m1 stop
United Airlines Logo
8:49 am - 4:04 pmORD-HLN
8h 15m1 stop
$495United Airlines
Find Deal
Mon, Aug 18 - Sat, Aug 23
Delta Logo
1:00 pm - 10:04 pmHLN-ORD
8h 04m1 stop
Delta Logo
3:50 pm - 10:13 pmORD-HLN
7h 23m2 stops
$561Delta
Find Deal
Mon, Oct 6 - Thu, Oct 9
Alaska Airlines Logo
6:18 pm - 12:03 amHLN-STL
28h 45m1 stop
Alaska Airlines Logo
7:16 am - 5:41 pmSTL-HLN
11h 25m2 stops
$635Alaska Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Helena to Illinois flights

Get data-powered insights and trends into flights from Helena to Illinois to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Helena to Illinois?

The average price of all round-trip flights from Helena to Illinois clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Illinois on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Tuesday is the most expensive day to fly from Helena to Illinois. For your return ticket, we recommend flying on a Thursday and avoiding Fridays for the best deals.


Good to know

Low seasonSeptember
Cheapest flight$158
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 33% increase in price.
Flight from Helena to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Helena to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Helena to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Helena to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Helena to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Helena to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Helena to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Helena to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Helena to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the afternoon, when round-trip flights cost $620 on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $708.

Reviews of the top airlines flying from Helena to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Helena to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Helena to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 7980 reviews
7.3Food
8.5Crew
8.2Boarding
7.9Entertainment
7.9Comfort
Airline reviews

Delayed and took off even later than the scheduled delay time

8.0 ExcellentAnonymous, Jul 2025DTW - SEA
Read more Delta reviews

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

Food was surprisingly good but the WiFi was not great

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Overall it was good. I missed my connection but I was put on another flight.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

I liked that the flight was nonstop from ORD to CIU for $200 round trip.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

The first flight was better in terms of the aircraft.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

Everything you need to know for your flight from Helena to Illinois

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