$137 Find Cheap Flights from Great Falls 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 Great Falls to Illinois departing on 11/1. 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

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 Great Falls 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 Great Falls to Illinois, as well as popular online travel agencies
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Cheap Flights from Great Falls to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$254
Chicago
Chicago1 stop$254

Book Cheap Great Falls 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 Great Falls 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 Great Falls to Illinois

Tue, Mar 3 - Wed, Mar 4
Delta Logo
1:10 pm - 9:55 pmGTF-ORD
7h 45m1 stop
Delta Logo
7:15 am - 12:32 pmORD-GTF
6h 17m1 stop
$254Delta
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Tue, Sep 30 - Sat, Oct 4
Delta Logo
5:40 am - 11:53 amGTF-ORD
5h 13m1 stop
Delta Logo
7:55 am - 12:25 pmORD-GTF
5h 30m1 stop
$298Delta
Find Deal
Tue, Mar 3 - Wed, Mar 4
Alaska Airlines Logo
4:00 pm - 11:59 pmGTF-ORD
6h 59m1 stop
Alaska Airlines Logo
7:45 am - 3:20 pmORD-GTF
8h 35m1 stop
$306Alaska Airlines
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Tue, Mar 3 - Wed, Mar 4
Delta Logo
1:10 pm - 11:44 pmGTF-ORD
9h 34m2 stops
Delta Logo
7:15 am - 12:32 pmORD-GTF
6h 17m1 stop
$325Delta
Find Deal
Wed, Oct 22 - Wed, Oct 29
United Airlines Logo
7:00 am - 1:12 pmGTF-ORD
5h 12m1 stop
United Airlines Logo
8:47 am - 1:27 pmORD-GTF
5h 40m1 stop
$334United Airlines
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Tue, Sep 30 - Sat, Oct 4
Delta Logo
5:40 am - 11:53 amGTF-ORD
5h 13m1 stop
Delta Logo
5:30 am - 5:27 pmORD-GTF
12h 57m2 stops
$339Delta
Find Deal
Fri, Oct 17 - Tue, Oct 21
United Airlines Logo
2:31 pm - 10:39 pmGTF-ORD
7h 08m1 stop
United Airlines Logo
2:17 pm - 9:11 pmORD-GTF
7h 54m1 stop
$344United Airlines
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Tue, Oct 14 - Sat, Oct 18
United Airlines Logo
2:31 pm - 10:39 pmGTF-ORD
7h 08m1 stop
United Airlines Logo
7:10 am - 1:26 pmORD-GTF
7h 16m1 stop
$356United Airlines
Find Deal
Fri, Oct 17 - Sat, Oct 18
United Airlines Logo
2:31 pm - 11:59 pmGTF-ORD
8h 28m1 stop
United Airlines Logo
7:10 am - 1:26 pmORD-GTF
7h 16m1 stop
$366United Airlines
Find Deal
Fri, Oct 10 - Mon, Oct 13
Alaska Airlines Logo
6:15 pm - 8:50 pmGTF-ORD
25h 35m1 stop
Alaska Airlines Logo
6:00 am - 5:35 pmORD-GTF
12h 35m1 stop
$575Alaska Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Great Falls to Illinois flights

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

What is the cheapest Great Falls to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Great Falls found in the last 72 hours was to Chicago, at $587 round-trip. The most popular route is from Great Falls (GTF) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $587.

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

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

For Great Falls to Illinois, Tuesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Illinois back to Great Falls, the best deals are generally found on Wednesday, with Saturday being the most expensive.

Good to know

Low seasonMay
Cheapest flight$137
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Great Falls to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Great Falls 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 Great Falls to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Great Falls 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 Great Falls 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 Great Falls 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 Great Falls 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 Great Falls 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 evening, when round-trip flights cost $349 on average. Morning departures are around 89% more expensive than evening flights, 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 $660.

Reviews of the top 3 airlines serving from Great Falls to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Great Falls 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 Great Falls 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
Alaska AirlinesOverall score based on 10000 reviews
7.8Comfort
7.0Entertainment
8.5Crew
8.1Boarding
7.1Food
Airline reviews

My flight was delayed 2 hours which led me to lose my connection. As a consequence, I had to spend hours changing flights and hotel reservations to arrange my arrival to Vancouver.

2.0 MediocreAnonymous, Sep 2025BWI - SEA
Read more Alaska Airlines reviews

My flight was delayed 2 hours which led me to lose my connection. As a consequence, I had to spend hours changing flights and hotel reservations to arrange my arrival to Vancouver.

No Free Wifi and the flight was a tad late.

The plane was clean. They got us to the destination. It was very difficult to hear the announcements at the gate. The person was speaking way too quickly, and the sound system did not carry to all parts of the seating area at the gate. The flight left more than an hour late, which left many of the passengers missing connections.

Awesome. Great flight. Super nice people and I like the extra space

The first leg of the trip was excellent. Lovely flight attendants and comfortable plane. The second leg left a lot to be desired. The flight attendant was rude when I asked for a Diet Coke, the boarding required quite a long walk and the plane was crammed and uncomfortable.

Why was I charged for a glass of wine on one flight and not on another? Why no movie or TVs? It was a long flight.

5 1/2 hour trip. Nice plane. easy boarding. Could have used a bit more beverage service but it was a red eye flight and they didn't want to wake everyone.

Planes were on time. Pilot kept everyone updated. Crew was friendly and helpful

I have mobility problems and requested wheelchair assistance in Seattle and Anchorage and none was provided at all. Very disappointed. Only one gate agent in Seattle asked if I needed assistance boarding my flight in Seattle.... and only after three gate changes.... requiring even more extremely painful walking without assistance.

When I booked with Kayak, I paid extra for a window seat for the long flight, so I could sleep more easily. But when I checked in, they changed my seat to a middle seat. This happened on both long flights to and from Chicago to Anchorage. For one flight, upon request they changed my seat back to a window seat. For the other, they would not and said the Alaska Airlines does not allow seat requests.....just disappointing.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

Flight attendant in first class gave poor service (like he didn't want to be there) and food was awful. We sat waiting for gate upon arrival over 45 mins.

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.

Everything you need to know for your flight from Great Falls to Illinois

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