$359 Find Cheap Flights from Helena to Illinois - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Helena to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
Chicago
6h 55m2 stops
from $359per person
St. Louis
5h 06m2 stops
from $359per person
Moline
5h 13m2 stops
from $439per person
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?

In the past 5 days, the cheapest round-trip tickets from Helena to Illinois were found on Delta ($359) and Alaska Airlines ($416).

Good to know

Cheapest flight

$359
Flight from Helena to St. Louis

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

 
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 10227 reviews
6.7Food
7.1Entertainment
7.7Boarding
8.1Crew
7.3Comfort
Airline reviews

Plane congestion resulted in a 1 hr wait from landing to arrival at the gate. This was in addition to also experiencing extreme delays on my incoming flight.

2.0 MediocreKristel, Sep 2026
Read more United Airlines reviews

Plane congestion resulted in a 1 hr wait from landing to arrival at the gate. This was in addition to also experiencing extreme delays on my incoming flight.

Very disappointing that on an international business class flight they would not give me access to the lounge in Boston. They said it was because it was a codeshare flight. International business class should include lounge access regardless of codeshare.

Crew was great. Seats are cramped and uncomfortable and I’m a small person.

Awful. Delay after delay. And then again on the tarmac.

Kept changing the takeoff time and the moved it up so arrived when boarding had already started. Then sat waiting to taxi in for a long time

Food was not Good Nuts came very wet & not tasting Good Main course I asked for Steak they got me Chicken because they don’t have more !!!!

It cancelled and we were unable to catch our connecting international flights.

Leaving at 7 when scheduled to leave at 4:20 - you tell me. Understood there was a ground stop. Then having to "reboot" the plane because of a lighting strike, also understood. But basically the flight was a "clusterf#$%".

On boarding crew at the airport called in the boarding numbers too early meaning before the previous line was completed resulting in later numbers getting to board ahead. Also she asked those who boarded from number 3 to have the tags in their carry-on bags and leave it in the jet bridge. Most of the overhead bins were empty though. This is more work for the ground staff in addition to more inconvenience for passengers waiting to get their carry-ons from the jet bridge.

Like the fact that the boarding was expedited. But the delay and chaos around the onboarding was not appreciated.

More options for your flight from Helena to Illinois

Complete your trip to Illinois with a hotel stay or car rental