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

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

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

Prices for flights from Great Falls Airport to Illinois refresh daily.

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

As of February 2026, there is 1 operator available to choose from for flights from Great Falls Airport to Illinois.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Great Falls Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois 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 Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$103 Cheap Flights from Great Falls to Illinois in 2026

1 adult

0 bags

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Find the cheapest flights from Great Falls to Illinois

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:05 pm - 9:34 pm

GTF

ORD

7h 29m

1 stop

7:20 am - 12:24 pm

ORD

GTF

6h 04m

1 stop

$232Delta

Tue, Mar 17 - Tue, Mar 24

6:20 pm - 7:26 am

GTF

ORD

12h 06m

2 stops

7:15 am - 12:23 pm

ORD

GTF

6h 08m

1 stop

$303Delta

Fri, Aug 7 - Sat, Aug 15

6:20 pm - 7:26 am

GTF

ORD

12h 06m

2 stops

9:30 am - 10:44 pm

ORD

GTF

14h 14m

2 stops

$308Delta

Fri, Aug 7 - Sat, Aug 15

1:10 pm - 9:58 pm

GTF

ORD

7h 48m

1 stop

7:15 am - 12:23 pm

ORD

GTF

6h 08m

1 stop

$353Delta

Sat, Aug 8 - Sat, Aug 15

1:10 pm - 9:58 pm

GTF

ORD

7h 48m

1 stop

9:30 am - 10:44 pm

ORD

GTF

14h 14m

2 stops

$359Delta

Sat, Aug 8 - Sat, Aug 15

1:05 pm - 9:34 pm

GTF

ORD

7h 29m

1 stop

5:30 am - 5:42 pm

ORD

GTF

13h 12m

2 stops

$393Delta

Tue, Mar 17 - Tue, Mar 24

1:10 pm - 9:58 pm

GTF

ORD

7h 48m

1 stop

7:15 am - 12:23 pm

ORD

GTF

6h 08m

1 stop

$428Delta

Fri, Aug 7 - Sat, Aug 15

12:30 pm - 4:46 pm

GTF

ORD

3h 16mnonstop

6:00 am - 9:19 pm

ORD

GTF

16h 19m

1 stop

$436United Airlines

Thu, Jul 9 - Mon, Jul 13

1:10 pm - 9:58 pm

GTF

ORD

7h 48m

1 stop

7:15 am - 12:23 pm

ORD

GTF

6h 08m

1 stop

$443Delta

Sat, Aug 8 - Mon, Aug 17

1:10 pm - 9:58 pm

GTF

ORD

7h 48m

1 stop

8:15 am - 5:39 pm

ORD

GTF

10h 24m

2 stops

$449Delta

Sat, Aug 8 - Mon, Aug 17

United Airlines flights from Great Falls to Illinois

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

United Airlines

Jul 9

GTF12:30 pmGreat Falls

3h 16m

ORD4:46 pmChicago O'Hare Intl

Jul 13

ORD6:00 amChicago O'Hare Intl

16h 19m

1 stop

GTF9:19 pmGreat Falls

$436

United Airlines

Jul 9

GTF2:29 pmGreat Falls

7h 50m

1 stop

ORD11:19 pmChicago O'Hare Intl

Jul 13

ORD9:39 pmChicago O'Hare Intl

24h 40m

1 stop

GTF9:19 pmGreat Falls

$475

United Airlines

Jul 9

GTF2:29 pmGreat Falls

7h 50m

1 stop

ORD11:19 pmChicago O'Hare Intl

Jul 13

ORD8:13 pmChicago O'Hare Intl

26h 06m

2 stops

GTF9:19 pmGreat Falls

$528

Delta flights from Great Falls to Illinois

Our best Delta deals on Great Falls to Illinois flight tickets

Delta

Mar 17

GTF1:05 pmGreat Falls

7h 29m

1 stop

ORD9:34 pmChicago O'Hare Intl

Mar 24

ORD7:20 amChicago O'Hare Intl

6h 04m

1 stop

GTF12:24 pmGreat Falls

$232

Delta

Aug 7

GTF6:20 pmGreat Falls

12h 06m

2 stops

ORD7:26 amChicago O'Hare Intl

Aug 15

ORD7:15 amChicago O'Hare Intl

6h 08m

1 stop

GTF12:23 pmGreat Falls

$303

Delta

Aug 7

GTF6:20 pmGreat Falls

12h 06m

2 stops

ORD7:26 amChicago O'Hare Intl

Aug 15

ORD9:30 amChicago O'Hare Intl

14h 14m

2 stops

GTF10:44 pmGreat Falls

$308

Fly from

Fly to

Route

Depart

Return

Price

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Tue 3/17

1:05 pm-9:34 pm

1 stop7h 29m

Chicago O'Hare Intl

Tue 3/24

7:20 am-12:24 pm

1 stop6h 04m

$232

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Fri 8/7

6:20 pm-7:26 am

2 stops12h 06m

Chicago O'Hare Intl

Sat 8/15

7:15 am-12:23 pm

1 stop6h 08m

$303

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Fri 8/7

6:20 pm-7:26 am

2 stops12h 06m

Chicago O'Hare Intl

Sat 8/15

9:30 am-10:44 pm

2 stops14h 14m

$308

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sat 8/8

1:10 pm-9:58 pm

1 stop7h 48m

Chicago O'Hare Intl

Sat 8/15

7:15 am-12:23 pm

1 stop6h 08m

$353

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sat 8/8

1:10 pm-9:58 pm

1 stop7h 48m

Chicago O'Hare Intl

Sat 8/15

9:30 am-10:44 pm

2 stops14h 14m

$359

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Tue 3/17

1:05 pm-9:34 pm

1 stop7h 29m

Chicago O'Hare Intl

Tue 3/24

5:30 am-5:42 pm

2 stops13h 12m

$393

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Fri 8/7

1:10 pm-9:58 pm

1 stop7h 48m

Chicago O'Hare Intl

Sat 8/15

7:15 am-12:23 pm

1 stop6h 08m

$428

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Thu 7/9

12:30 pm-4:46 pm

Nonstop3h 16m

Chicago O'Hare Intl

Mon 7/13

6:00 am-9:19 pm

1 stop16h 19m

$436

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sat 8/8

1:10 pm-9:58 pm

1 stop7h 48m

Chicago O'Hare Intl

Mon 8/17

7:15 am-12:23 pm

1 stop6h 08m

$443

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sat 8/8

1:10 pm-9:58 pm

1 stop7h 48m

Chicago O'Hare Intl

Mon 8/17

8:15 am-5:39 pm

2 stops10h 24m

$449

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first

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

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

What is the cheapest Great Falls to Illinois flight route?

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

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

There are 3 cabin classes available to choose from on Great Falls to Illinois 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 Great Falls to Illinois flights?

You could potentially save up to 36% on your flight if you consider stops on a Great Falls to Illinois flight.

Cheap Great Falls to Illinois flight deals and tips

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

Best Price Found	$318
Fastest flight time	3h 16m
Direct flights	None

The best flight deal from Great Falls to Illinois found on momondo in the last 72 hours is $318

The fastest flight from Great Falls to Illinois takes 3h 16m

There are no direct flights from Great Falls to Illinois. Popular non-direct route for this connection is Great Falls Airport - Chicago O'Hare Intl Airport.

Search flight deals

When did momondo last update prices for flights from Great Falls Airport to Illinois?
Prices for flights from Great Falls Airport to Illinois refresh daily.
How many operators does momondo search for flights from Great Falls Airport to Illinois?
As of February 2026, there is 1 operator available to choose from for flights from Great Falls Airport to Illinois.
How old do you have to be to fly from Great Falls Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Great Falls Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois 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 Illinois. 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 Great Falls to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Great Falls to Illinois is Embraer 175 (Enhanced Winglets) (100.00% of total bookings).

Best airlines flying from Great Falls to Illinois

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $277	Free Cancellation	Rating 7.4 9,308 reviews		Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Great Falls to Illinois 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 Illinois that suits you.

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

Yes. momondo allows you to filter the results for Great Falls to Illinois flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Great Falls.

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

Price alerts on flights to Illinois from Great Falls are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.