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 Chicago and flying into Great Falls (one of the most popular routes), then the duration is 7h 32m on average. Another popular route from Illinois to Great Falls is flying from Peoria to Great Falls, which will take roughly 11h 58m. Keep in mind that layovers or delays could extend your travel time.

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

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating 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 December 2025.

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.

$143 Cheap Flights from Illinois to Great Falls in 2025/26

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Find the cheapest flights from Illinois to Great Falls

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 5:19 pm

ORD

GTF

10h 19m1 stop

5:59 pm - 2:38 pm

GTF

ORD

19h 39m1 stop

$303Alaska Airlines

Sat, Jan 17 - Wed, Jan 21

8:00 am - 5:19 pm

ORD

GTF

10h 19m1 stop

5:59 pm - 11:50 pm

GTF

ORD

28h 51m1 stop

$313Alaska Airlines

Sat, Jan 17 - Wed, Jan 21

6:06 pm - 5:19 pm

ORD

GTF

24h 13m1 stop

5:59 pm - 1:10 pm

GTF

ORD

18h 11m2 stops

$318Alaska Airlines

Thu, Feb 5 - Sun, Feb 8

6:06 pm - 5:19 pm

ORD

GTF

24h 13m1 stop

5:59 pm - 5:10 pm

GTF

ORD

22h 11m1 stop

$353Alaska Airlines

Thu, Feb 5 - Sun, Feb 8

10:45 am - 9:43 pm

PIA

GTF

11h 58m2 stops

2:29 pm - 8:47 pm

GTF

PIA

5h 18m1 stop

$354United Airlines

Sat, Jan 17 - Wed, Jan 21

6:30 am - 1:48 pm

PIA

GTF

8h 18m2 stops

2:29 pm - 8:47 pm

GTF

PIA

5h 18m1 stop

$399United Airlines

Sat, Jan 24 - Tue, Jan 27

5:50 pm - 10:46 pm

ORD

GTF

5h 56m1 stop

2:35 pm - 11:00 pm

GTF

ORD

7h 25m1 stop

$406United Airlines

Fri, Jan 2 - Mon, Jan 5

1:28 pm - 10:30 pm

MDW

GTF

10h 02m2 stops

5:30 am - 6:32 pm

GTF

MDW

12h 02m2 stops

$739Delta

Wed, Jan 7 - Fri, Jan 9

6:00 am - 5:30 pm

MDW

GTF

12h 30m2 stops

5:25 am - 4:16 pm

GTF

MDW

9h 51m2 stops

$1,600Delta

Thu, Feb 5 - Sun, Feb 8

9:29 am - 5:38 pm

MDW

GTF

9h 09m2 stops

6:18 pm - 9:05 am

GTF

MDW

13h 47m2 stops

$1,980Delta

Tue, Dec 30 - Sat, Jan 3

Alaska Airlines flights from Illinois to Great Falls

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

Alaska Airlines

Jan 20

ORD8:00 amChicago O'Hare Intl

10h 19m

1 stop

GTF5:19 pmGreat Falls

Jan 27

GTF5:59 pmGreat Falls

28h 51m

1 stop

ORD11:50 pmChicago O'Hare Intl

$293

Find similar

Alaska Airlines

Jan 17

ORD8:00 amChicago O'Hare Intl

10h 19m

1 stop

GTF5:19 pmGreat Falls

Jan 21

GTF5:59 pmGreat Falls

19h 39m

1 stop

ORD2:38 pmChicago O'Hare Intl

$303

Find similar

Alaska Airlines

Jan 20

ORD8:00 amChicago O'Hare Intl

10h 19m

1 stop

GTF5:19 pmGreat Falls

Jan 27

GTF5:59 pmGreat Falls

28h 38m

2 stops

ORD11:37 pmChicago O'Hare Intl

$308

Find similar

Delta flights from Illinois to Great Falls

Our best Delta deals on Illinois to Great Falls flight tickets

Delta

Jan 17

ORD6:45 pmChicago O'Hare Intl

18h 48m

2 stops

GTF12:33 pmGreat Falls

Jan 24

GTF1:12 pmGreat Falls

7h 40m

1 stop

ORD9:52 pmChicago O'Hare Intl

$353

Find similar

Delta

Jan 17

ORD8:50 amChicago O'Hare Intl

28h 43m

2 stops

GTF12:33 pmGreat Falls

Jan 26

GTF6:10 pmGreat Falls

13h 32m

2 stops

ORD8:42 amChicago O'Hare Intl

$358

Find similar

Delta

Jan 23

ORD1:57 pmChicago O'Hare Intl

23h 35m

2 stops

GTF12:32 pmGreat Falls

Jan 26

GTF6:10 pmGreat Falls

13h 32m

2 stops

ORD8:42 amChicago O'Hare Intl

$410

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Sat 1/17

8:00 am-5:19 pm

1 stop10h 19m

Great Falls

Wed 1/21

5:59 pm-2:38 pm

1 stop19h 39m

$303

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Sat 1/17

8:00 am-5:19 pm

1 stop10h 19m

Great Falls

Wed 1/21

5:59 pm-11:50 pm

1 stop28h 51m

$313

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Thu 2/5

6:06 pm-5:19 pm

1 stop24h 13m

Great Falls

Sun 2/8

5:59 pm-1:10 pm

2 stops18h 11m

$318

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Thu 2/5

6:06 pm-5:19 pm

1 stop24h 13m

Great Falls

Sun 2/8

5:59 pm-5:10 pm

1 stop22h 11m

$353

PeoriaGreat Falls

PIA - GTF

PIAGTF

Greater Peoria

Sat 1/17

10:45 am-9:43 pm

2 stops11h 58m

Great Falls

Wed 1/21

2:29 pm-8:47 pm

1 stop5h 18m

$354

PeoriaGreat Falls

PIA - GTF

PIAGTF

Greater Peoria

Sat 1/24

6:30 am-1:48 pm

2 stops8h 18m

Great Falls

Tue 1/27

2:29 pm-8:47 pm

1 stop5h 18m

$399

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 1/2

5:50 pm-10:46 pm

1 stop5h 56m

Great Falls

Mon 1/5

2:35 pm-11:00 pm

1 stop7h 25m

$406

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Wed 1/7

1:28 pm-10:30 pm

2 stops10h 02m

Great Falls

Fri 1/9

5:30 am-6:32 pm

2 stops12h 02m

$739

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Thu 2/5

6:00 am-5:30 pm

2 stops12h 30m

Great Falls

Sun 2/8

5:25 am-4:16 pm

2 stops9h 51m

$1,600

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Tue 12/30

9:29 am-5:38 pm

2 stops9h 09m

Great Falls

Sat 1/3

6:18 pm-9:05 am

2 stops13h 47m

$1,980

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 month to fly to Great Falls?

The month of November is another great option to travel to Great Falls, with average flight prices from Illinois averaging around $274.

What is the cheapest day to depart on your flight to Great Falls?

The cheapest day to depart on your flight to Great Falls is on a Friday when prices can be found for as low as $397. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $676.

What is the cheapest time of day to depart on your flight to Great Falls?

According to our data, the cheapest time of day to fly to Great Falls is in the afternoon. momondo users have found flights departing from Illinois to Great Falls in the afternoon for as low as $398. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $658 on average. Flights to Great Falls from Illinois in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 are 2 cabin classes 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 41% 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

Fastest flight time	5h 56m
Direct flights	None

The fastest flight from Illinois to Great Falls takes 5h 56m

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

Search flight deals

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 December 2025.
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
United Airlines	PriceFrom $248	Free Cancellation	Rating 7.4 9,091 reviews		Search United Airlines flights

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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.