$168 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 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 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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Flight Deals

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

Mon, Apr 13 - Thu, Apr 16
Multiple Airlines Logo
11:42 am - 6:20 am
GTF
-
ORD
17h 38m
1 stop
Multiple Airlines Logo
10:07 pm - 10:52 am
ORD
-
GTF
13h 45m
1 stop
$282Multiple Airlines
Tue, Jul 7 - Thu, Jul 16
United Airlines Logo
12:30 pm - 4:48 pm
GTF
-
ORD
3h 18mnonstop
United Airlines Logo
9:00 am - 11:46 am
ORD
-
GTF
3h 46mnonstop
$370United Airlines
Tue, Mar 31 - Sat, Apr 4
United Airlines Logo
2:30 pm - 10:41 pm
GTF
-
ORD
7h 11m
1 stop
United Airlines Logo
7:00 am - 1:31 pm
ORD
-
GTF
7h 31m
1 stop
$378United Airlines
Sat, Apr 25 - Wed, Apr 29
United Airlines Logo
2:30 pm - 9:17 pm
GTF
-
ORD
5h 47m
1 stop
United Airlines Logo
2:35 pm - 9:17 pm
ORD
-
GTF
7h 42m
1 stop
$398United Airlines
Sat, Apr 25 - Wed, Apr 29
United Airlines Logo
2:30 pm - 10:58 pm
GTF
-
ORD
7h 28m
1 stop
United Airlines Logo
2:05 pm - 9:17 pm
ORD
-
GTF
8h 12m
1 stop
$408United Airlines
Wed, Apr 29 - Sun, May 3
Delta Logo
6:20 pm - 8:37 am
GTF
-
ORD
13h 17m
2 stops
Delta Logo
7:35 am - 12:27 pm
ORD
-
GTF
5h 52m
1 stop
$414Delta
Wed, Apr 29 - Sun, May 3
Delta Logo
6:20 pm - 8:37 am
GTF
-
ORD
13h 17m
2 stops
Delta Logo
1:36 pm - 10:29 pm
ORD
-
GTF
9h 53m
2 stops
$419Delta
Wed, Apr 29 - Sun, May 3
Delta Logo
1:09 pm - 9:18 pm
GTF
-
ORD
7h 09m
1 stop
Delta Logo
7:35 am - 12:27 pm
ORD
-
GTF
5h 52m
1 stop
$428Delta
Tue, Apr 14 - Fri, Apr 17
Alaska Airlines Logo
5:06 pm - 11:59 pm
GTF
-
ORD
29h 53m
1 stop
Alaska Airlines Logo
6:00 am - 4:26 pm
ORD
-
GTF
11h 26m
1 stop
$431Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
6:15 pm - 6:40 am
GTF
-
ORD
11h 25m
1 stop
Alaska Airlines Logo
8:48 pm - 5:35 pm
ORD
-
GTF
21h 47m
1 stop
$432Alaska Airlines
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 $1,079 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 $1,079.

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

The average price for all round-trip flights from Great Falls to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $627 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 $627.

Can I save money by flying with a layover from Great Falls to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $363 on average.

Good to know

Cheapest flight$168
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.

Reviews of the top airlines flying 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.
7.9
DeltaOverall score based on 8286 reviews
7.9Comfort
7.2Food
8.5Crew
7.8Entertainment
8.1Boarding
Airline reviews

Miserable. This entire round trip was miserable. I booked evening flights to and from Detroit on consecutive days that should have had me at my destination by 10:30. Instead I arrived after 3am on my flight to Detroit and after midnight on my return. Multiple unforced errors like awaiting bags to get put on the plane for almost an hour in Detroit and a 20 minute delay to pull up to the gate in Atlanta has me rethinking my assumption that delta is the best and most reliable airline

2.0 MediocreKyle, Mar 2026
DTW - ATL
Read more Delta reviews

Miserable. This entire round trip was miserable. I booked evening flights to and from Detroit on consecutive days that should have had me at my destination by 10:30. Instead I arrived after 3am on my flight to Detroit and after midnight on my return. Multiple unforced errors like awaiting bags to get put on the plane for almost an hour in Detroit and a 20 minute delay to pull up to the gate in Atlanta has me rethinking my assumption that delta is the best and most reliable airline

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

United Airlines is my preferred airlines and I am thankful for Gary who also help support me on the phone to switch my flight literally last min.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

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

Information on your arrival and departure airports