$357 Find Cheap Flights from Helena to Illinois

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to Illinois departing on 2/14. 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$357
Moline
Moline1 stop$359
St. Louis
St. Louis1 stop$442
Chicago
Chicago1 stop$357
Moline
Moline1 stop$359
St. Louis
St. Louis1 stop$442

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

Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
4:36 pm - 2:05 pm
HLN
-
ORD
20h 29m1 stop
Alaska Airlines Logo
7:00 am - 3:59 pm
ORD
-
HLN
9h 59m1 stop
$357Alaska Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
2:27 pm - 8:34 pm
HLN
-
MLI
5h 07m1 stop
United Airlines Logo
8:46 am - 1:41 pm
MLI
-
HLN
5h 55m1 stop
$359United Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
6:15 am - 3:09 pm
HLN
-
MLI
7h 54m2 stops
United Airlines Logo
8:46 am - 1:41 pm
MLI
-
HLN
5h 55m1 stop
$364United Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
6:15 am - 3:09 pm
HLN
-
MLI
7h 54m2 stops
United Airlines Logo
10:47 am - 9:26 pm
MLI
-
HLN
11h 39m2 stops
$369United Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
6:15 am - 3:09 pm
HLN
-
MLI
7h 54m2 stops
United Airlines Logo
10:47 am - 9:26 pm
MLI
-
HLN
11h 39m2 stops
$415United Airlines
Wed, Jan 28 - Sat, Jan 31
Alaska Airlines Logo
6:48 pm - 1:54 pm
HLN
-
STL
18h 06m1 stop
Alaska Airlines Logo
6:19 pm - 6:11 pm
STL
-
HLN
24h 52m1 stop
$442Alaska Airlines
Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
4:36 pm - 1:11 pm
HLN
-
ORD
19h 35m2 stops
Alaska Airlines Logo
7:00 am - 3:59 pm
ORD
-
HLN
9h 59m1 stop
$447Alaska Airlines
Sat, Mar 14 - Thu, Mar 19
Delta Logo
12:59 pm - 9:34 pm
HLN
-
ORD
7h 35m1 stop
Delta Logo
11:15 am - 10:35 pm
ORD
-
HLN
12h 20m2 stops
$664Delta
Sat, Mar 14 - Sun, Mar 22
Delta Logo
12:59 pm - 9:34 pm
HLN
-
ORD
7h 35m1 stop
Delta Logo
3:59 pm - 10:35 pm
ORD
-
HLN
7h 36m2 stops
$914Delta
Sat, Mar 14 - Thu, Mar 19
Delta Logo
5:30 am - 4:49 pm
HLN
-
ORD
10h 19m2 stops
Delta Logo
11:15 am - 10:35 pm
ORD
-
HLN
12h 20m2 stops
$969Delta
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$357
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 4% lower on average.
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 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 9094 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

10.0 ExcellentMichele, Dec 2025
RSW - ORD
Read more United Airlines reviews

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Very bad! They kept delaying my flight and wouldn’t do anything about it

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

Excellent experience. Starting with the agent at the Premier bag drop who noticed I was very early for my scheduled flight and offered to rebook me on an earlier flight with my seat preference. She would not let me leave the counter until she knew that all of the changes and new boarding pass showed up on my United app. At the gate, the flight boarded quickly such that we departed early and the flight was smooth. We arrived 20 minutes early at ORD and I was able to be home in time for dinner. One of the best flights I've had.

Salina to travers city was great! But the sept 24 Tranverse city was not! Traverse city to chichago was cancelled, i went to Denver & got to Salina 6 hours later!

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

Information on your arrival and departure airports