$170 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 6/1. 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, 0 bags

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
Chicago1 stop$329
St. Louis
St. Louis1 stop$419
Chicago
Chicago1 stop$329
St. Louis
St. Louis1 stop$419

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

Tue, Jun 2 - Tue, Jun 9
Delta Logo
1:03 pm - 9:50 pm
HLN
-
ORD
7h 47m
1 stop
Delta Logo
7:45 am - 12:20 pm
ORD
-
HLN
5h 35m
1 stop
$329Delta
Wed, Oct 21 - Sat, Oct 24
Delta Logo
12:50 pm - 9:53 pm
HLN
-
ORD
8h 03m
1 stop
Delta Logo
11:30 am - 10:41 pm
ORD
-
HLN
12h 11m
2 stops
$334Delta
Fri, Jun 5 - Mon, Jun 8
Delta Logo
1:03 pm - 9:50 pm
HLN
-
ORD
7h 47m
1 stop
Delta Logo
7:45 am - 12:20 pm
ORD
-
HLN
5h 35m
1 stop
$354Delta
Wed, Jul 29 - Tue, Aug 4
Delta Logo
5:40 am - 4:23 pm
HLN
-
ORD
9h 43m
2 stops
Delta Logo
2:12 pm - 10:30 pm
ORD
-
HLN
9h 18m
2 stops
$364Delta
Fri, Jul 3 - Tue, Jul 7
United Airlines Logo
2:20 pm - 10:49 pm
HLN
-
ORD
7h 29m
1 stop
United Airlines Logo
6:00 am - 1:33 pm
ORD
-
HLN
8h 33m
1 stop
$387United Airlines
Sat, Jul 4 - Wed, Jul 8
Delta Logo
1:00 pm - 9:23 pm
HLN
-
ORD
7h 23m
1 stop
Delta Logo
7:45 am - 12:15 pm
ORD
-
HLN
5h 30m
1 stop
$394Delta
Tue, Aug 25 - Sat, Aug 29
United Airlines Logo
2:29 pm - 8:39 pm
HLN
-
STL
5h 10m
1 stop
United Airlines Logo
4:40 pm - 9:16 pm
STL
-
HLN
5h 36m
1 stop
$419United Airlines
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
2:30 pm - 10:44 pm
HLN
-
ORD
7h 14m
1 stop
United Airlines Logo
8:55 am - 1:27 pm
ORD
-
HLN
5h 32m
1 stop
$419United Airlines
Tue, Aug 25 - Sat, Aug 29
United Airlines Logo
2:29 pm - 8:39 pm
HLN
-
STL
5h 10m
1 stop
United Airlines Logo
7:01 am - 9:16 pm
STL
-
HLN
15h 15m
2 stops
$469United Airlines
Thu, May 28 - Sun, May 31
Alaska Airlines Logo
4:43 pm - 3:16 pm
HLN
-
STL
21h 33m
1 stop
Alaska Airlines Logo
7:41 pm - 4:06 pm
STL
-
HLN
21h 25m
1 stop
$649Alaska Airlines
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.

Which airlines provide the cheapest flights from Helena to Illinois?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Helena to Illinois were found on Delta ($329) and United Airlines ($419).

Good to know

Cheapest flight$170
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.

Reviews of the top airline 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.
7.4
United AirlinesOverall score based on 9684 reviews
6.6Food
8.1Crew
7.3Comfort
7.1Entertainment
7.7Boarding
Airline reviews

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

6.0 GoodAnonymous, May 2026
DEN - ORD
Read more United Airlines reviews

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was significantly delayed. The inbound flight from EWR was delayed departing because of mechanical problems. My original departure from CLT was 5:28 pm but due to the delay of the inbound flight, after arrival, deplaning, cleaning, boarding, we did not push back from the gate until 9:00 pm. Once in the air, the flight was smooth and what was originally supposed to be an arrival in ORD at 7:30 pm local time turned out to be 9:35 pm.

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

It was better than excellent. The staff in Mason City were great. The young woman that pushed my wheelchair did more than could be expected of her. She came from India 17 years ago. I don't remember her name.

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

Information on your arrival and departure airports