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

Alaska Airlines, 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 April 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.

$165 Cheap Flights from Great Falls to Illinois in 2026

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Find the cheapest flights from Great Falls to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:15 pm - 6:40 am

GTF

ORD

11h 25m

1 stop

6:00 am - 5:35 pm

ORD

GTF

12h 35m

1 stop

$318Alaska Airlines

Thu, Apr 30 - Sun, May 3

5:40 am - 12:00 pm

GTF

ORD

5h 20m

1 stop

7:45 am - 12:33 pm

ORD

GTF

5h 48m

1 stop

$368Delta

Fri, Jul 3 - Sat, Jul 11

5:06 pm - 6:39 am

GTF

ORD

12h 33m

1 stop

6:00 am - 5:35 pm

ORD

GTF

12h 35m

1 stop

$378Alaska Airlines

Sun, Apr 19 - Thu, Apr 23

10:19 am - 5:44 am

GTF

ORD

18h 25m

1 stop

9:48 pm - 9:29 am

ORD

GTF

36h 41m

2 stops

$382Multiple Airlines

Fri, Jul 3 - Sat, Jul 11

1:15 pm - 9:48 pm

GTF

ORD

7h 33m

1 stop

5:00 pm - 10:44 pm

ORD

GTF

6h 44m

1 stop

$383Delta

Tue, Aug 4 - Sat, Aug 15

5:30 am - 11:51 am

GTF

ORD

5h 21m

1 stop

6:25 am - 5:40 pm

ORD

GTF

12h 15m

2 stops

$384Delta

Sat, Apr 18 - Wed, Apr 22

6:20 pm - 8:37 am

GTF

ORD

13h 17m

2 stops

1:36 pm - 10:29 pm

ORD

GTF

9h 53m

2 stops

$389Delta

Sat, Apr 18 - Wed, Apr 22

2:30 pm - 11:28 pm

GTF

ORD

7h 58m

1 stop

2:35 pm - 9:17 pm

ORD

GTF

7h 42m

1 stop

$398United Airlines

Thu, Apr 23 - Mon, Apr 27

2:37 pm - 11:19 pm

GTF

ORD

7h 42m

1 stop

9:00 am - 11:43 am

ORD

GTF

3h 43mnonstop

$403United Airlines

Fri, Jul 3 - Sat, Jul 11

2:30 pm - 10:58 pm

GTF

ORD

7h 28m

1 stop

7:00 am - 1:31 pm

ORD

GTF

7h 31m

1 stop

$408United Airlines

Sat, Apr 25 - Wed, Apr 29

Delta flights from Great Falls to Illinois

Our best Delta deals on Great Falls to Illinois flight tickets

Delta

Jul 3

GTF5:40 amGreat Falls

5h 20m

1 stop

ORD12:00 pmChicago O'Hare Intl

Jul 11

ORD7:45 amChicago O'Hare Intl

5h 48m

1 stop

GTF12:33 pmGreat Falls

$368

Delta

Aug 4

GTF1:15 pmGreat Falls

7h 33m

1 stop

ORD9:48 pmChicago O'Hare Intl

Aug 15

ORD5:00 pmChicago O'Hare Intl

6h 44m

1 stop

GTF10:44 pmGreat Falls

$383

Delta

Apr 18

GTF5:30 amGreat Falls

5h 21m

1 stop

ORD11:51 amChicago O'Hare Intl

Apr 22

ORD6:25 amChicago O'Hare Intl

12h 15m

2 stops

GTF5:40 pmGreat Falls

$384

Alaska Airlines flights from Great Falls to Illinois

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

Alaska Airlines

Apr 30

GTF6:15 pmGreat Falls

11h 25m

1 stop

ORD6:40 amChicago O'Hare Intl

May 3

ORD6:00 amChicago O'Hare Intl

12h 35m

1 stop

GTF5:35 pmGreat Falls

$318

Alaska Airlines

Apr 19

GTF5:06 pmGreat Falls

12h 33m

1 stop

ORD6:39 amChicago O'Hare Intl

Apr 23

ORD6:00 amChicago O'Hare Intl

12h 35m

1 stop

GTF5:35 pmGreat Falls

$378

Alaska Airlines

Apr 20

GTF5:06 pmGreat Falls

12h 33m

1 stop

ORD6:39 amChicago O'Hare Intl

Apr 24

ORD3:52 pmChicago O'Hare Intl

26h 43m

2 stops

GTF5:35 pmGreat Falls

$480

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Thu 4/30

6:15 pm-6:40 am

1 stop11h 25m

Chicago O'Hare Intl

Sun 5/3

6:00 am-5:35 pm

1 stop12h 35m

$318

Quickest round-trip

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Fri 7/3

5:40 am-12:00 pm

1 stop5h 20m

Chicago O'Hare Intl

Sat 7/11

7:45 am-12:33 pm

1 stop5h 48m

$368

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sun 4/19

5:06 pm-6:39 am

1 stop12h 33m

Chicago O'Hare Intl

Thu 4/23

6:00 am-5:35 pm

1 stop12h 35m

$378

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Fri 7/3

10:19 am-5:44 am

1 stop18h 25m

Chicago O'Hare Intl

Sat 7/11

9:48 pm-9:29 am

2 stops36h 41m

$382

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Tue 8/4

1:15 pm-9:48 pm

1 stop7h 33m

Chicago O'Hare Intl

Sat 8/15

5:00 pm-10:44 pm

1 stop6h 44m

$383

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sat 4/18

5:30 am-11:51 am

1 stop5h 21m

Chicago O'Hare Intl

Wed 4/22

6:25 am-5:40 pm

2 stops12h 15m

$384

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sat 4/18

6:20 pm-8:37 am

2 stops13h 17m

Chicago O'Hare Intl

Wed 4/22

1:36 pm-10:29 pm

2 stops9h 53m

$389

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Thu 4/23

2:30 pm-11:28 pm

1 stop7h 58m

Chicago O'Hare Intl

Mon 4/27

2:35 pm-9:17 pm

1 stop7h 42m

$398

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Fri 7/3

2:37 pm-11:19 pm

1 stop7h 42m

Chicago O'Hare Intl

Sat 7/11

9:00 am-11:43 am

Nonstop3h 43m

$403

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Sat 4/25

2:30 pm-10:58 pm

1 stop7h 28m

Chicago O'Hare Intl

Wed 4/29

7:00 am-1:31 pm

1 stop7h 31m

$408

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 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

Fastest flight time	3h 18m
Direct flights	Thu
Airports in Illinois	98 airports

The fastest flight from Great Falls to Illinois takes 3h 18m

Direct flights go from Great Falls to Illinois on Thursday. There are no airlines offering direct flights.

There are 98 airports in Illinois. From Great Falls there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

Frequently asked questions about flying 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 April 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 $300	Free Cancellation	Rating 7.4 9,551 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.