What is the cheapest airline that flies from Illinois to Great Falls?

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Illinois to Great Falls

How long does it take to fly to Great Falls?

Flight times from Illinois to Great Falls vary, but if you’re flying out of Peoria and flying into Great Falls (one of the most popular routes), then the duration is 5h 56m on average. Another popular route from Illinois to Great Falls is flying from Chicago to Great Falls, which will take roughly 7h 47m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from Illinois to Great Falls Airport?

Prices for flights from Illinois to Great Falls Airport are updated daily.

How many operators does momondo search for flights from Illinois to Great Falls Airport?

The number of operators available for flights from Illinois to Great Falls Airport is 1 as of October 2026.

How old do you have to be to fly from Illinois to Great Falls Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Great Falls Airport.

What documentation or ID do you need to fly to Great Falls Airport?

The required travel and health documents for your Great Falls Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Great Falls Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$184 Cheap Flights from Illinois to Great Falls in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Great Falls

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 3:28 pmORD Chicago O'Hare Intl-GTF Great Falls

8h 28m1 stop Seattle/Tacoma Intl

4:08 pm - 11:59 pmGTF Great Falls-ORD Chicago O'Hare Intl

6h 51m1 stop Seattle/Tacoma Intl

$368Alaska Airlines

Sat, Jan 30 - Wed, Feb 3

6:57 pm - 3:28 pmORD Chicago O'Hare Intl-GTF Great Falls

21h 31m1 stop Seattle/Tacoma Intl

4:08 pm - 11:59 pmGTF Great Falls-ORD Chicago O'Hare Intl

6h 51m1 stop Seattle/Tacoma Intl

$368Alaska Airlines

Fri, Jan 15 - Tue, Jan 19

8:39 am - 5:39 pmORD Chicago O'Hare Intl-GTF Great Falls

10h 00m2 stops Detroit Metropolitan Wayne County Salt Lake City

1:19 pm - 10:27 pmGTF Great Falls-ORD Chicago O'Hare Intl

8h 08m1 stop Salt Lake City

$374Delta

Tue, Dec 15 - Sun, Dec 20

7:25 am - 12:39 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 14m1 stop Salt Lake City

1:19 pm - 10:27 pmGTF Great Falls-ORD Chicago O'Hare Intl

8h 08m1 stop Salt Lake City

$398Delta

Tue, Dec 15 - Sun, Dec 20

6:00 am - 4:01 pmORD Chicago O'Hare Intl-GTF Great Falls

11h 01m1 stop Seattle/Tacoma Intl

4:41 pm - 5:56 amGTF Great Falls-ORD Chicago O'Hare Intl

12h 15m1 stop Seattle/Tacoma Intl

$398Alaska Airlines

Fri, Nov 20 - Fri, Nov 27

7:30 am - 12:41 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 11m1 stop Salt Lake City

1:21 pm - 9:47 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 26m1 stop Salt Lake City

$403Delta

Fri, Nov 13 - Sun, Nov 15

7:30 am - 12:41 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 11m1 stop Salt Lake City

1:21 pm - 9:47 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 26m1 stop Salt Lake City

$403Delta

Fri, Nov 13 - Sun, Nov 15

9:51 am - 10:30 pmORD Chicago O'Hare Intl-GTF Great Falls

13h 39m2 stops Atlanta Hartsfield-Jackson Salt Lake City

1:21 pm - 9:47 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 26m1 stop Salt Lake City

$409Delta

Fri, Nov 13 - Sun, Nov 15

9:51 am - 10:30 pmORD Chicago O'Hare Intl-GTF Great Falls

13h 39m2 stops Atlanta Hartsfield-Jackson Salt Lake City

1:21 pm - 9:47 pmGTF Great Falls-ORD Chicago O'Hare Intl

7h 26m1 stop Salt Lake City

$409Delta

Fri, Nov 13 - Sun, Nov 15

4:20 pm - 9:38 pmORD Chicago O'Hare Intl-GTF Great Falls

6h 18m1 stop Denver Intl

6:30 am - 1:15 pmGTF Great Falls-ORD Chicago O'Hare Intl

5h 45m1 stop Denver Intl

$438United Airlines

Sat, Nov 7 - Wed, Nov 11

Cheap last minute flights

Enter your travel dates to find the best prices.

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

$538Delta

Thu, Oct 29 - 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

$538Delta

Thu, Oct 29 - Mon, Nov 2

2:30 pm - 9:38 pmORD Chicago O'Hare Intl-GTF Great Falls

8h 08m1 stop Denver Intl

2:45 pm - 9:30 pmGTF Great Falls-ORD Chicago O'Hare Intl

5h 45m1 stop Denver Intl

$538United Airlines

Thu, Oct 29 - Sat, Oct 31

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

6h 09m1 stop Denver Intl

2:45 pm - 9:30 pmGTF Great Falls-ORD Chicago O'Hare Intl

5h 45m1 stop Denver Intl

$538United Airlines

Thu, Oct 29 - Sun, Nov 1

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

6h 03m1 stop Salt Lake City

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

5h 15m1 stop Salt Lake City

$538Delta

Thu, Oct 29 - Sun, Nov 1

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

$538Delta

Thu, Oct 29 - Sun, Nov 1

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

6h 03m1 stop Salt Lake City

5:40 am - 4:41 pmGTF Great Falls-ORD Chicago O'Hare Intl

10h 01m2 stops Salt Lake City Minneapolis St Paul

$544Delta

Thu, Oct 29 - Sat, Oct 31

7:00 am - 4:30 pmORD Chicago O'Hare Intl-GTF Great Falls

10h 30m1 stop Seattle/Tacoma Intl

5:10 pm - 5:40 amGTF Great Falls-ORD Chicago O'Hare Intl

11h 30m1 stop Seattle/Tacoma Intl

$694Alaska Airlines

Mon, Nov 2 - Tue, Nov 3

7:00 am - 4:30 pmORD Chicago O'Hare Intl-GTF Great Falls

10h 30m1 stop Seattle/Tacoma Intl

5:10 pm - 1:09 pmGTF Great Falls-ORD Chicago O'Hare Intl

18h 59m2 stops Seattle/Tacoma Intl Portland

$932Alaska Airlines

Mon, Nov 2 - Tue, Nov 3

9:00 am - 4:35 pmORD Chicago O'Hare Intl-GTF Great Falls

8h 35m1 stop Seattle/Tacoma Intl

5:15 pm - 6:20 pmGTF Great Falls-ORD Chicago O'Hare Intl

24h 05m1 stop Seattle/Tacoma Intl

$1,051Alaska Airlines

Thu, Oct 29 - Fri, Oct 30

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Alaska Airlines flights from Illinois to Great Falls

Our best Alaska Airlines deals on Illinois to Great Falls flight tickets

Alaska Airlines

Jan 30

ORD8:00 amChicago O'Hare Intl

8h 28m

1 stop

GTF3:28 pmGreat Falls

Feb 3

GTF4:08 pmGreat Falls

6h 51m

1 stop

ORD11:59 pmChicago O'Hare Intl

$368

Alaska Airlines

Nov 20

ORD6:00 amChicago O'Hare Intl

11h 01m

1 stop

GTF4:01 pmGreat Falls

Nov 27

GTF4:41 pmGreat Falls

12h 15m

1 stop

ORD5:56 amChicago O'Hare Intl

$398

Alaska Airlines

Jan 15

ORD6:57 pmChicago O'Hare Intl

21h 31m

1 stop

GTF3:28 pmGreat Falls

Jan 19

GTF4:08 pmGreat Falls

20h 05m

2 stops

ORD1:13 pmChicago O'Hare Intl

$457

Delta flights from Illinois to Great Falls

Our best Delta deals on Illinois to Great Falls flight tickets

Delta

Dec 15

ORD8:39 amChicago O'Hare Intl

10h 00m

2 stops

GTF5:39 pmGreat Falls

Dec 20

GTF1:19 pmGreat Falls

8h 08m

1 stop

ORD10:27 pmChicago O'Hare Intl

$374

Delta

Nov 13

ORD7:30 amChicago O'Hare Intl

6h 11m

1 stop

GTF12:41 pmGreat Falls

Nov 15

GTF1:21 pmGreat Falls

7h 26m

1 stop

ORD9:47 pmChicago O'Hare Intl

$403

Delta

Nov 13

ORD9:51 amChicago O'Hare Intl

13h 39m

2 stops

GTF10:30 pmGreat Falls

Nov 15

GTF1:21 pmGreat Falls

7h 26m

1 stop

ORD9:47 pmChicago O'Hare Intl

$409

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Sat 1/30

8:00 am-3:28 pm

1 stop8h 28m

Great Falls

Wed 2/3

4:08 pm-11:59 pm

1 stop6h 51m

$368

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Fri 1/15

6:57 pm-3:28 pm

1 stop21h 31m

Great Falls

Tue 1/19

4:08 pm-11:59 pm

1 stop6h 51m

$368

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Tue 12/15

8:39 am-5:39 pm

2 stops10h 00m

Great Falls

Sun 12/20

1:19 pm-10:27 pm

1 stop8h 08m

$374

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Tue 12/15

7:25 am-12:39 pm

1 stop6h 14m

Great Falls

Sun 12/20

1:19 pm-10:27 pm

1 stop8h 08m

$398

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Fri 11/20

6:00 am-4:01 pm

1 stop11h 01m

Great Falls

Fri 11/27

4:41 pm-5:56 am

1 stop12h 15m

$398

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Fri 11/13

7:30 am-12:41 pm

1 stop6h 11m

Great Falls

Sun 11/15

1:21 pm-9:47 pm

1 stop7h 26m

$403

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Fri 11/13

7:30 am-12:41 pm

1 stop6h 11m

Great Falls

Sun 11/15

1:21 pm-9:47 pm

1 stop7h 26m

$403

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Fri 11/13

9:51 am-10:30 pm

2 stops13h 39m

Great Falls

Sun 11/15

1:21 pm-9:47 pm

1 stop7h 26m

$409

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Fri 11/13

9:51 am-10:30 pm

2 stops13h 39m

Great Falls

Sun 11/15

1:21 pm-9:47 pm

1 stop7h 26m

$409

Quickest round-trip

ChicagoGreat Falls

ORD Chicago O'Hare Intl - GTF Great Falls

ORDGTF

Chicago O'Hare Intl

Sat 11/7

4:20 pm-9:38 pm

1 stop6h 18m

Great Falls

Wed 11/11

6:30 am-1:15 pm

1 stop5h 45m

$438

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Illinois to Great Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest Illinois to Great Falls flight route?

Fly from Chicago O'Hare Intl to Great Falls for the best Illinois - Great Falls flight prices

What cabin class options are available on Illinois to Great Falls flights?

There is only 1 cabin class available to choose from on Illinois to Great Falls flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Great Falls flights?

You could potentially save up to 61% on your flight if you consider stops on a Illinois to Great Falls flight.

Cheap Illinois to Great Falls flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Great Falls

Best Price Found	$184
Fastest flight time	5h 44m
Direct flights	None

The best one-way flight to Great Falls from Illinois in the past 72 hours is $184. The best round-trip flight deal from Illinois to Great Falls found on momondo in the last 72 hours is $368.

The fastest flight from Illinois to Great Falls takes 5h 44m

There are no direct flights from Illinois to Great Falls. There are no popular flight routes from Illinois to Great Falls.

Search flight deals

Frequently asked questions about flying from Illinois to Great Falls

When did momondo last update prices for flights from Illinois to Great Falls Airport?
Prices for flights from Illinois to Great Falls Airport are updated daily.
How many operators does momondo search for flights from Illinois to Great Falls Airport?
The number of operators available for flights from Illinois to Great Falls Airport is 1 as of October 2026.
How old do you have to be to fly from Illinois to Great Falls Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Great Falls Airport.
What documentation or ID do you need to fly to Great Falls Airport?
The required travel and health documents for your Great Falls Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Great Falls Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to Great Falls?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Illinois to Great Falls is Embraer 175 (Enhanced Winglets) (100.00% of total bookings).

Best airlines flying from Illinois to Great Falls

Compare and see reviews for airlines that fly from Illinois to Great Falls with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $318	Free Cancellation	Rating 7.8 8,681 reviews		Search Delta flights

Shelby

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Great Falls?

It is quick and easy to find Illinois to Great Falls flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Great Falls that suits you.

Can I find flights from Illinois to Great Falls with flexible booking policies on momondo?

Flights from Illinois to Great Falls with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Illinois to Great Falls?

momondo helps you find the best flight between Illinois and Great Falls by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Illinois to Great Falls right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Great Falls, momondo offers a useful price alert feature which will track prices for flights to Great Falls from Illinois and alert you when they change.