$134 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 7/22. 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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Flights Deals

Best Illinois Flight Deals from Great Falls

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$277
Chicago
Chicago1 stop$277

Cheap Flights from Great Falls to Illinois

 
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

Sat, Jul 12 - Sat, Jul 19
United Airlines Logo
2:35 pm - 10:34 pmGTF-ORD
6h 59m1 stop
United Airlines Logo
7:10 am - 1:36 pmORD-GTF
7h 26m1 stop
$277United Airlines
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Mon, Jun 30 - Fri, Jul 4
Delta Logo
5:42 am - 11:52 amGTF-ORD
5h 10m1 stop
Delta Logo
4:30 pm - 10:45 pmORD-GTF
7h 15m1 stop
$286Delta
Find Deal
Mon, Jun 30 - Fri, Jul 4
Delta Logo
5:42 am - 11:52 amGTF-ORD
5h 10m1 stop
Delta Logo
2:00 pm - 10:45 pmORD-GTF
9h 45m2 stops
$292Delta
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Sun, Jun 29 - Thu, Jul 3
Delta Logo
5:42 am - 11:52 amGTF-ORD
5h 10m1 stop
Delta Logo
4:30 pm - 10:45 pmORD-GTF
7h 15m1 stop
$347Delta
Find Deal
Sat, Jul 12 - Sat, Jul 19
United Airlines Logo
12:59 pm - 5:10 pmGTF-ORD
3h 11mnonstop
United Airlines Logo
8:45 am - 11:29 amORD-GTF
3h 44mnonstop
$420United Airlines
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Fri, Jul 11 - Sat, Jul 19
Delta Logo
5:45 am - 11:53 amGTF-ORD
5h 08m1 stop
Delta Logo
8:30 am - 5:39 pmORD-GTF
10h 09m2 stops
$424Delta
Find Deal
Sat, Jul 12 - Sat, Jul 19
United Airlines Logo
2:35 pm - 9:10 pmGTF-ORD
5h 35m1 stop
United Airlines Logo
8:42 am - 1:36 pmORD-GTF
29h 54m2 stops
$463United Airlines
Find Deal
Thu, Jul 31 - Thu, Aug 7
Hawaiian Airlines Logo
4:55 pm - 5:40 amGTF-ORD
11h 45m1 stop
Hawaiian Airlines Logo
8:42 pm - 4:13 pmORD-GTF
20h 31m1 stop
$533Hawaiian Airlines
Find Deal
Thu, Jul 31 - Thu, Aug 7
Alaska Airlines Logo
4:55 pm - 1:07 pmGTF-ORD
19h 12m2 stops
Alaska Airlines Logo
5:55 pm - 4:13 pmORD-GTF
23h 18m1 stop
$556Alaska Airlines
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Thu, Jul 31 - Thu, Aug 7
Alaska Airlines Logo
4:55 pm - 1:07 pmGTF-ORD
19h 12m2 stops
Alaska Airlines Logo
7:00 am - 4:13 pmORD-GTF
34h 13m2 stops
$561Alaska Airlines
Find Deal
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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?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Great Falls to Illinois.

The cheapest ticket to Illinois from Great Falls found in the last 72 hours was to Chicago, at $368 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 $368.

What is the cheapest month to fly from Great Falls to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Great Falls to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Great Falls to Illinois is September, when tickets cost $307 (return) on average. On the other hand, the most expensive months are November and August, when the average cost of round-trip tickets is $913 and $573 respectively.

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
High seasonJune
Cheapest flight$134
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 19% 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.

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
8.5Crew
8.1Boarding
7.8Comfort
7.1Entertainment
7.1Food
Airline reviews

Both flights were delayed going to our destination and leaving, and communication about the delays was not great by the airlines, now the crews were phenomenal and great to be around!!

6.0 GoodAnna, Jun 2025SEA - BUR
Read more Alaska Airlines reviews

Both flights were delayed going to our destination and leaving, and communication about the delays was not great by the airlines, now the crews were phenomenal and great to be around!!

Both flights were delayed due to an incident at SEA. The problem really rests with inadequate customer & plane facilities for Skywest at SEA. You feel like you are in a cattle enclosure. And planes were sitting on taxiways waiting for parking so every plane was late. SEA appears to be over capacity. It is not a fun passenger experience waiting. But crews and flights were all fine. Alaska needs to step up.

Really good except my daughter's tv broke during the flight so she could watch tv

Staff are helpful and patient. I don’t appreciate the almost 5 hours delay and also the delay of our luggage and being switched from one carousel to another to pick them up.

Delayed. It's not our first flight with them either, it's actually our 3rd and all 3 were delayed by hours each time. It was a myriad of delays. On one flight we boarded after being delayed for a little over an hr, only to be told we were going to sit in the plane for another hour before departing. Once landed, we waited another 40ish min to get to our gate. On another flight, flight was delayed just under 3 hrs but atleast we got to wait it out at the airport terminal. Its just a bad experience overall flying with Alaska Airlines.

Flight was delayed for weather, then delayed for mechanical, then just cancelled. Once mechanical problems started I wish you had just started offering rebooking options (at the same airport). I felt my trip was not a priority for you. I called you, I asked for a better option (than changing airports), then I had to literally run around the airport making it happen. Do better.

Staff were great but we were delayed on the tarmac for over an hour.

Great crew, smooth flight and landing. Wish they would offer Dr. Pepper and a choice of flavors of pretzels.

I would've liked to have the seat tablets like before to view movies, with long travels not everyone carries tablets to view movies. And phones are not worth it because screens to small.

It was horrible. Last minute gate change, delays, more delays and then we had to wait for a stweardess to onboard. No explanation for the wait. No apologies. We got to RDM way past schedule @ 1:30 am!!!! Stressful and exhausting. We'd avoid flying Alaska ever again.

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent check-in. Crew was good. Excellent communication from flight deck.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

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.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

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