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 41m on average. Another popular route from Illinois to Great Falls is flying from Chicago to Great Falls, which will take roughly 6h 18m. 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 March 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.

$160 Cheap Flights from Illinois to Great Falls in 2026

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Find the cheapest flights from Illinois to Great Falls

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:33 pm - 10:52 am

STL

GTF

20h 19m

2 stops

11:42 am - 6:06 pm

GTF

STL

29h 24m

1 stop

$313Multiple Airlines

jue., may. 7 - lun., may. 11

7:35 am - 12:27 pm

ORD

GTF

5h 52m

1 stop

1:09 pm - 9:18 pm

GTF

ORD

7h 09m

1 stop

$318Delta

mar., abr. 21 - sáb., abr. 25

2:00 pm - 10:26 pm

ORD

GTF

9h 26m

2 stops

1:07 pm - 9:50 pm

GTF

ORD

7h 43m

1 stop

$324Delta

mié., jun. 3 - sáb., jun. 6

9:49 am - 5:43 pm

MDW

GTF

8h 54m

2 stops

6:25 pm - 9:08 am

GTF

MDW

13h 43m

2 stops

$329Delta

mié., jul. 15 - mié., jul. 22

10:45 am - 9:18 pm

PIA

GTF

11h 33m

2 stops

2:35 pm - 9:19 pm

GTF

PIA

5h 44m

1 stop

$334United Airlines

mar., may. 5 - mar., may. 12

7:05 am - 1:41 pm

ORD

GTF

7h 36m

1 stop

2:37 pm - 9:39 pm

GTF

ORD

6h 02m

1 stop

$335United Airlines

mié., may. 27 - sáb., may. 30

12:16 pm - 10:52 am

STL

GTF

23h 36m

1 stop

11:42 am - 6:06 pm

GTF

STL

29h 24m

1 stop

$350Multiple Airlines

jue., may. 7 - lun., may. 11

8:00 am - 5:35 pm

ORD

GTF

10h 35m

1 stop

6:15 pm - 6:40 am

GTF

ORD

11h 25m

1 stop

$363Alaska Airlines

jue., abr. 30 - mar., may. 5

12:18 pm - 8:41 pm

PIA

GTF

9h 23m

1 stop

11:42 am - 10:08 am

GTF

PIA

21h 26m

2 stops

$377Allegiant Air

jue., may. 7 - vie., may. 15

3:03 pm - 8:41 pm

PIA

GTF

30h 38m

1 stop

11:42 am - 10:08 am

GTF

PIA

21h 26m

2 stops

$387Allegiant Air

sáb., may. 9 - vie., may. 15

Delta flights from Illinois to Great Falls

Our best Delta deals on Illinois to Great Falls flight tickets

Delta

Apr 21

ORD7:35 amChicago O'Hare Intl

5h 52m

1 stop

GTF12:27 pmGreat Falls

Apr 25

GTF1:09 pmGreat Falls

7h 09m

1 stop

ORD9:18 pmChicago O'Hare Intl

$318

Delta

Jun 3

ORD2:00 pmChicago O'Hare Intl

9h 26m

2 stops

GTF10:26 pmGreat Falls

Jun 6

GTF1:07 pmGreat Falls

7h 43m

1 stop

ORD9:50 pmChicago O'Hare Intl

$324

Delta

Jul 17

ORD8:52 amChicago O'Hare Intl

9h 51m

2 stops

GTF5:43 pmGreat Falls

Jul 24

GTF5:40 amGreat Falls

10h 19m

2 stops

ORD4:59 pmChicago O'Hare Intl

$329

United Airlines flights from Illinois to Great Falls

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

United Airlines

May 5

PIA8:30 amGreater Peoria

13h 48m

2 stops

GTF9:18 pmGreat Falls

May 12

GTF2:35 pmGreat Falls

5h 44m

1 stop

PIA9:19 pmGreater Peoria

$334

United Airlines

May 27

ORD7:05 amChicago O'Hare Intl

7h 36m

1 stop

GTF1:41 pmGreat Falls

May 30

GTF2:37 pmGreat Falls

6h 02m

1 stop

ORD9:39 pmChicago O'Hare Intl

$335

United Airlines

Jul 16

ORD9:00 amChicago O'Hare Intl

3h 46m

GTF11:46 amGreat Falls

Aug 12

GTF2:31 pmGreat Falls

8h 28m

1 stop

ORD11:59 pmChicago O'Hare Intl

$362

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

jue. 5/7

3:33 pm-10:52 am

2 stops20h 19m

Great Falls

lun. 5/11

11:42 am-6:06 pm

1 stop29h 24m

$313

Quickest round-trip

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

mar. 4/21

7:35 am-12:27 pm

1 stop5h 52m

Great Falls

sáb. 4/25

1:09 pm-9:18 pm

1 stop7h 09m

$318

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

mié. 6/3

2:00 pm-10:26 pm

2 stops9h 26m

Great Falls

sáb. 6/6

1:07 pm-9:50 pm

1 stop7h 43m

$324

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

mié. 7/15

9:49 am-5:43 pm

2 stops8h 54m

Great Falls

mié. 7/22

6:25 pm-9:08 am

2 stops13h 43m

$329

PeoriaGreat Falls

PIA - GTF

PIAGTF

Greater Peoria

mar. 5/5

10:45 am-9:18 pm

2 stops11h 33m

Great Falls

mar. 5/12

2:35 pm-9:19 pm

1 stop5h 44m

$334

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

mié. 5/27

7:05 am-1:41 pm

1 stop7h 36m

Great Falls

sáb. 5/30

2:37 pm-9:39 pm

1 stop6h 02m

$335

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

jue. 5/7

12:16 pm-10:52 am

1 stop23h 36m

Great Falls

lun. 5/11

11:42 am-6:06 pm

1 stop29h 24m

$350

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

jue. 4/30

8:00 am-5:35 pm

1 stop10h 35m

Great Falls

mar. 5/5

6:15 pm-6:40 am

1 stop11h 25m

$363

PeoriaGreat Falls

PIA - GTF

PIAGTF

Greater Peoria

jue. 5/7

12:18 pm-8:41 pm

1 stop9h 23m

Great Falls

vie. 5/15

11:42 am-10:08 am

2 stops21h 26m

$377

PeoriaGreat Falls

PIA - GTF

PIAGTF

Greater Peoria

sáb. 5/9

3:03 pm-8:41 pm

1 stop30h 38m

Great Falls

vie. 5/15

11:42 am-10:08 am

2 stops21h 26m

$387

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 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 49% 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	3h 43m
Direct flights	Wed, Thu, Fri and Sun
Airports in Great Falls	1 airport

The fastest flight from Illinois to Great Falls takes 3h 43m

Direct flights go from Illinois to Great Falls on Wednesday, Thursday, Friday and Sunday. There are no airlines offering direct flights.

There is 1 airport in Great Falls. From Illinois there are direct flights to 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 March 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
United Airlines	PriceFrom $248	Free Cancellation	Rating 7.4 9,499 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.