$122 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 3/5. 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

Fri, Mar 20 - Tue, Mar 24
United Airlines Logo
2:30 pm - 11:52 pm
GTF
-
ORD
8h 22m
1 stop
United Airlines Logo
7:00 am - 1:33 pm
ORD
-
GTF
7h 33m
1 stop
$258United Airlines
Fri, Feb 20 - Fri, Feb 27
Alaska Airlines Logo
4:57 pm - 1:11 pm
GTF
-
ORD
19h 14m
2 stops
Alaska Airlines Logo
7:00 am - 4:17 pm
ORD
-
GTF
10h 17m
1 stop
$396Alaska Airlines
Fri, Jul 24 - Mon, Jul 27
Delta Logo
6:20 pm - 7:26 am
GTF
-
ORD
12h 06m
2 stops
Delta Logo
7:15 am - 12:23 pm
ORD
-
GTF
6h 08m
1 stop
$402Delta
Fri, Feb 20 - Fri, Feb 27
Alaska Airlines Logo
4:57 pm - 4:33 pm
GTF
-
ORD
22h 36m
1 stop
Alaska Airlines Logo
7:00 am - 4:17 pm
ORD
-
GTF
10h 17m
1 stop
$404Alaska Airlines
Thu, Jul 9 - Mon, Jul 13
United Airlines Logo
12:30 pm - 4:46 pm
GTF
-
ORD
3h 16mnonstop
United Airlines Logo
6:00 am - 9:19 pm
ORD
-
GTF
16h 19m
1 stop
$436United Airlines
Sat, May 30 - Thu, Jun 11
United Airlines Logo
12:30 pm - 4:46 pm
GTF
-
ORD
3h 16mnonstop
United Airlines Logo
2:33 pm - 9:19 pm
ORD
-
GTF
7h 46m
1 stop
$440United Airlines
Tue, Feb 17 - Mon, Feb 23
United Airlines Logo
2:25 pm - 10:52 pm
GTF
-
ORD
7h 27m
1 stop
United Airlines Logo
2:02 pm - 9:33 pm
ORD
-
GTF
8h 31m
1 stop
$463United Airlines
Fri, Jul 24 - Mon, Jul 27
Delta Logo
1:10 pm - 9:58 pm
GTF
-
ORD
7h 48m
1 stop
Delta Logo
7:15 am - 12:23 pm
ORD
-
GTF
6h 08m
1 stop
$468Delta
Thu, Jul 9 - Mon, Jul 13
United Airlines Logo
2:29 pm - 11:19 pm
GTF
-
ORD
7h 50m
1 stop
United Airlines Logo
5:00 am - 9:19 pm
ORD
-
GTF
17h 19m
1 stop
$475United Airlines
Tue, Feb 17 - Mon, Feb 23
Delta Logo
5:20 am - 5:37 pm
GTF
-
MDW
11h 17m
2 stops
Delta Logo
10:49 am - 10:29 pm
MDW
-
GTF
12h 40m
2 stops
$659Delta
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 $551 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 $551.

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 $361 on average.

Good to know

Cheapest flight$122
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 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.

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 8130 reviews
7.2Food
8.1Boarding
7.8Entertainment
8.5Crew
7.9Comfort
Airline reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

2.0 MediocreTodd, Jan 2026
IAH - ATL
Read more Delta reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

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

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.

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

Information on your arrival and departure airports