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

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 Illinois to Great Falls.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Great Falls from 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 Illinois to Great Falls?

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 to Great Falls with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Great Falls?

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 to Great Falls from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$328 CHEAP FLIGHTS from Illinois to Great Falls

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Flight Deals

Cheap Flights from Illinois to Great Falls

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Illinois to Great Falls

Fri, Oct 2 - Sat, Oct 10

7:45 am - 12:35 pmORD Chicago O'Hare Intl-GTF Great Falls

5h 50m1 stop Salt Lake City

1:18 pm - 10:05 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 47m1 stop Salt Lake City

$328Delta

Fri, Oct 2 - Sat, Oct 10

7:05 am - 5:41 pmORD Chicago O'Hare Intl-GTF Great Falls

11h 36m2 stops Detroit Metropolitan Wayne County Salt Lake City

1:18 pm - 10:05 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 47m1 stop Salt Lake City

$334Delta

Sat, Oct 24 - Sat, Oct 31

7:35 am - 12:38 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 03m1 stop Salt Lake City

1:18 pm - 10:05 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 47m1 stop Salt Lake City

$378Delta

Fri, Oct 30 - Thu, Nov 5

7:45 am - 12:38 pmSTL Lambert-St Louis-GTF Great Falls

5h 53m1 stop Salt Lake City

5:40 am - 1:32 pmGTF Great Falls-STL Lambert-St Louis

6h 52m1 stop Salt Lake City

$378Delta

Sat, Nov 7 - Wed, Nov 11

8:40 am - 1:49 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 09m1 stop Denver Intl

2:45 pm - 11:59 pmGTF Great Falls-ORD Chicago O'Hare Intl

8h 14m1 stop Denver Intl

$418United Airlines

Tue, Sep 29 - Sat, Oct 3

7:00 am - 1:41 pmORD Chicago O'Hare Intl-GTF Great Falls

7h 41m1 stop Denver Intl

2:37 pm - 9:52 pmGTF Great Falls-ORD Chicago O'Hare Intl

6h 15m1 stop Denver Intl

$418United Airlines

Sat, Oct 24 - Sat, Oct 31

4:20 pm - 9:22 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 02m1 stop Denver Intl

2:45 pm - 11:59 pmGTF Great Falls-ORD Chicago O'Hare Intl

8h 14m1 stop Denver Intl

$418United Airlines

Fri, Sep 25 - Tue, Sep 29

7:36 pm - 4:39 pmSTL Lambert-St Louis-GTF Great Falls

22h 03m1 stop Seattle/Tacoma Intl

5:19 pm - 2:21 pmGTF Great Falls-STL Lambert-St Louis

20h 02m1 stop Seattle/Tacoma Intl

$613Alaska Airlines

Mon, Oct 12 - Mon, Oct 19

3:20 pm - 4:35 pmSTL Lambert-St Louis-GTF Great Falls

26h 15m2 stops Dallas/Fort Worth Seattle/Tacoma Intl

5:15 pm - 9:20 amGTF Great Falls-STL Lambert-St Louis

15h 05m2 stops Seattle/Tacoma Intl Dallas/Fort Worth

$985Alaska Airlines

Mon, Oct 12 - Mon, Oct 19

6:04 am - 4:35 pmSTL Lambert-St Louis-GTF Great Falls

35h 31m2 stops Los Angeles Seattle/Tacoma Intl

5:15 pm - 9:20 amGTF Great Falls-STL Lambert-St Louis

15h 05m2 stops Seattle/Tacoma Intl Dallas/Fort Worth

$985Alaska Airlines

Recent last minute flight deals from Illinois to Great Falls

Sat, Sep 19 - Sat, Sep 26

7:45 am - 12:35 pmORD Chicago O'Hare Intl-GTF Great Falls

5h 50m1 stop Salt Lake City

5:40 am - 11:55 amGTF Great Falls-ORD Chicago O'Hare Intl

5h 15m1 stop Salt Lake City

$433Delta

Sat, Sep 19 - Sat, Sep 26

1:51 pm - 10:37 pmORD Chicago O'Hare Intl-GTF Great Falls

9h 46m2 stops Atlanta Hartsfield-Jackson Salt Lake City

5:40 am - 11:55 amGTF Great Falls-ORD Chicago O'Hare Intl

5h 15m1 stop Salt Lake City

$439Delta

Sat, Sep 19 - Sat, Sep 26

10:44 am - 10:37 pmORD Chicago O'Hare Intl-GTF Great Falls

12h 53m2 stops Atlanta Hartsfield-Jackson Salt Lake City

6:21 pm - 8:36 amGTF Great Falls-ORD Chicago O'Hare Intl

13h 15m2 stops Salt Lake City Atlanta Hartsfield-Jackson

$444Delta

Sat, Sep 19 - Sat, Sep 26

7:45 am - 12:35 pmORD Chicago O'Hare Intl-GTF Great Falls

5h 50m1 stop Salt Lake City

1:15 pm - 10:00 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 45m1 stop Salt Lake City

$453Delta

Sat, Sep 19 - Sat, Sep 26

1:51 pm - 10:37 pmORD Chicago O'Hare Intl-GTF Great Falls

9h 46m2 stops Atlanta Hartsfield-Jackson Salt Lake City

5:40 am - 11:55 amGTF Great Falls-ORD Chicago O'Hare Intl

5h 15m1 stop Salt Lake City

$459Delta

Sat, Sep 19 - Sat, Sep 26

11:17 am - 10:37 pmORD Chicago O'Hare Intl-GTF Great Falls

12h 20m2 stops Detroit Metropolitan Wayne County Salt Lake City

5:40 am - 4:59 pmGTF Great Falls-ORD Chicago O'Hare Intl

10h 19m2 stops Salt Lake City Minneapolis St Paul

$464Delta

Sat, Sep 19 - Sat, Sep 26

12:29 pm - 10:37 pmORD Chicago O'Hare Intl-GTF Great Falls

11h 08m2 stops Minneapolis St Paul Salt Lake City

6:21 pm - 8:36 amGTF Great Falls-ORD Chicago O'Hare Intl

13h 15m2 stops Salt Lake City Atlanta Hartsfield-Jackson

$464Delta

Sat, Sep 19 - Sat, Sep 26

2:00 pm - 10:37 pmMDW Chicago Midway-GTF Great Falls

9h 37m2 stops Minneapolis St Paul Salt Lake City

5:40 am - 5:59 pmGTF Great Falls-MDW Chicago Midway

11h 19m2 stops Salt Lake City Minneapolis St Paul

$464Delta

Mon, Sep 21 - Tue, Sep 29

3:56 pm - 9:12 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 16m1 stop Denver Intl

2:37 pm - 9:51 pmGTF Great Falls-ORD Chicago O'Hare Intl

6h 14m1 stop Denver Intl

$517United Airlines

Sat, Sep 19 - Wed, Sep 23

3:56 pm - 9:12 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 16m1 stop Denver Intl

2:25 pm - 10:46 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 21m1 stop Denver Intl

$554United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$328

Best time to beat the crowds but there is an average 36% increase in price.

Most popular time to fly and prices are also 13% lower on average.

Flight from Chicago O'Hare Airport to Great Falls

How does KAYAK find such low prices on flights from Illinois to Great Falls?
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 Illinois to Great Falls.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Great Falls?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Great Falls from 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 Illinois to Great Falls?
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 to Great Falls with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Great Falls?
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 to Great Falls from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.