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 52m on average. Another popular route from Illinois to Great Falls is flying from Chicago to Great Falls, which will take roughly 7h 41m. 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 2 as of August 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.

$251 Cheap Flights from Illinois to Great Falls in 2025

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Find the cheapest flights from Illinois to Great Falls

Round-trip

One-way

Last minute

Cheap round-trip flights

9:00 am - 4:05 pmORD-GTF

8h 05m1 stop

10:21 pm - 11:51 amGTF-ORD

12h 30m1 stop

$251

Find Deal

Mon, Sep 8 - Fri, Sep 19

6:15 am - 4:05 pmORD-GTF

10h 50m1 stop

10:21 pm - 7:50 pmGTF-ORD

20h 29m2 stops

$254

Find Deal

Mon, Sep 8 - Fri, Sep 19

9:00 am - 4:05 pmORD-GTF

8h 05m1 stop

10:21 pm - 11:10 amGTF-ORD

35h 49m3 stops

$289

Find Deal

Mon, Sep 8 - Fri, Sep 19

10:42 am - 9:32 pmORD-GTF

11h 50m2 stops

10:22 pm - 2:27 pmGTF-ORD

15h 05m1 stop

$312

Find Deal

Mon, Oct 6 - Mon, Oct 13

1:58 pm - 9:28 pmORD-GTF

8h 30m1 stop

2:35 pm - 11:59 pmGTF-ORD

8h 24m1 stop

$332United Airlines

Find Deal

Fri, Sep 12 - Fri, Sep 19

8:00 am - 5:35 pmORD-GTF

10h 35m1 stop

6:15 pm - 6:24 amGTF-ORD

11h 09m1 stop

$357Alaska Airlines

Find Deal

Tue, Oct 14 - Sun, Oct 19

2:00 pm - 10:45 pmORD-GTF

9h 45m2 stops

6:00 am - 12:04 pmGTF-ORD

5h 04m1 stop

$383Delta

Find Deal

Fri, Aug 29 - Sun, Aug 31

2:00 pm - 10:45 pmORD-GTF

9h 45m2 stops

5:45 am - 4:45 pmGTF-ORD

10h 00m2 stops

$388Delta

Find Deal

Fri, Aug 29 - Sun, Aug 31

3:50 pm - 5:35 pmORD-GTF

26h 45m2 stops

6:15 pm - 6:24 amGTF-ORD

11h 09m1 stop

$400Alaska Airlines

Find Deal

Tue, Oct 14 - Sun, Oct 19

2:53 pm - 9:28 pmORD-GTF

7h 35m1 stop

7:00 am - 1:15 pmGTF-ORD

5h 15m1 stop

$513United Airlines

Find Deal

Fri, Aug 29 - Sun, Aug 31

Delta flights from Illinois to Great Falls

Our best Delta deals on Illinois to Great Falls flight tickets

Delta

Aug 29

ORD2:00 pmChicago O'Hare Intl

9h 45m

2 stops

GTF10:45 pmGreat Falls

Aug 31

GTF6:00 amGreat Falls

5h 04m

1 stop

ORD12:04 pmChicago O'Hare Intl

$383

Find similar

Delta

Aug 29

ORD2:00 pmChicago O'Hare Intl

9h 45m

2 stops

GTF10:45 pmGreat Falls

Aug 31

GTF5:45 amGreat Falls

10h 00m

2 stops

ORD4:45 pmChicago O'Hare Intl

$388

Find similar

Delta

Aug 23

ORD5:45 amChicago O'Hare Intl

12h 41m

2 stops

GTF5:26 pmGreat Falls

Sep 6

GTF5:45 amGreat Falls

12h 24m

2 stops

ORD7:09 pmChicago O'Hare Intl

$389

Find similar

United Airlines flights from Illinois to Great Falls

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

United Airlines

Sep 12

ORD1:58 pmChicago O'Hare Intl

8h 30m

1 stop

GTF9:28 pmGreat Falls

Sep 19

GTF2:35 pmGreat Falls

8h 24m

1 stop

ORD11:59 pmChicago O'Hare Intl

$332

Find similar

United Airlines

Aug 23

ORD2:53 pmChicago O'Hare Intl

7h 35m

1 stop

GTF9:28 pmGreat Falls

Sep 6

GTF7:00 amGreat Falls

6h 55m

1 stop

ORD2:55 pmChicago O'Hare Intl

$388

Find similar

United Airlines

Aug 29

ORD2:53 pmChicago O'Hare Intl

7h 35m

1 stop

GTF9:28 pmGreat Falls

Aug 31

GTF7:00 amGreat Falls

5h 15m

1 stop

ORD1:15 pmChicago O'Hare Intl

$513

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Mon 9/8

9:00 am-4:05 pm

1 stop8h 05m

Great Falls

Fri 9/19

10:21 pm-11:51 am

1 stop12h 30m

$251

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Mon 9/8

6:15 am-4:05 pm

1 stop10h 50m

Great Falls

Fri 9/19

10:21 pm-7:50 pm

2 stops20h 29m

$254

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Mon 9/8

9:00 am-4:05 pm

1 stop8h 05m

Great Falls

Fri 9/19

10:21 pm-11:10 am

3 stops35h 49m

$289

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Mon 10/6

10:42 am-9:32 pm

2 stops11h 50m

Great Falls

Mon 10/13

10:22 pm-2:27 pm

1 stop15h 05m

$312

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 9/12

1:58 pm-9:28 pm

1 stop8h 30m

Great Falls

Fri 9/19

2:35 pm-11:59 pm

1 stop8h 24m

$332

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Tue 10/14

8:00 am-5:35 pm

1 stop10h 35m

Great Falls

Sun 10/19

6:15 pm-6:24 am

1 stop11h 09m

$357

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 8/29

2:00 pm-10:45 pm

2 stops9h 45m

Great Falls

Sun 8/31

6:00 am-12:04 pm

1 stop5h 04m

$383

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 8/29

2:00 pm-10:45 pm

2 stops9h 45m

Great Falls

Sun 8/31

5:45 am-4:45 pm

2 stops10h 00m

$388

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Tue 10/14

3:50 pm-5:35 pm

2 stops26h 45m

Great Falls

Sun 10/19

6:15 pm-6:24 am

1 stop11h 09m

$400

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 8/29

2:53 pm-9:28 pm

1 stop7h 35m

Great Falls

Sun 8/31

7:00 am-1:15 pm

1 stop5h 15m

$513

Flights are sorted by cheapest round-trip flights first.

Sorted 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

Other information

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 59% 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	$251
Fastest flight time	5h 37m
Direct flights	None
Airports in Great Falls	1 airport

The best flight deal from Illinois to Great Falls found on momondo in the last 72 hours is $251

The fastest flight from Illinois to Great Falls takes 5h 37m

There are no direct flights from Illinois to Great Falls. Popular non-direct routes for this connection are Lambert-St Louis Airport - Great Falls Airport, Chicago Midway Airport - Great Falls Airport and Chicago O'Hare Intl Airport - Great Falls Airport.

There is 1 airport near Great Falls: Great Falls (GTF)

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 2 as of August 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
Alaska Airlines	PriceFrom $225	Free Cancellation	Rating 8.0 10,000 reviews		Search Alaska Airlines flights
United Airlines	PriceFrom $268	Free Cancellation	Rating 7.4 8,919 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.