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Great Falls

$180+ Cheap flights from Illinois to Great Falls (GTF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — GTF
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
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Find flight deals from Illinois to Great Falls

Cheapest flights from Illinois to Great Falls
Explore the most affordable flight options available from Illinois to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 2, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amORD - GTF
1 stop13h 55mAlaska Airlines
Tue 12/97:35 pmGTF - ORD
1 stop18h 04mAlaska Airlines
Deal found 10/30$264
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:29 pmORD - GTF
1 stop6h 53mDelta
Tue 12/96:10 pmGTF - ORD
2 stops13h 29mDelta
Deal found 10/30$270
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:20 amORD - GTF
1 stop6h 11mDelta
Tue 12/96:10 pmGTF - ORD
2 stops13h 29mDelta
Deal found 10/30$272
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amMDW - GTF
2 stops12h 28mDelta
Tue 12/91:12 pmGTF - MDW
2 stops9h 35mDelta
Deal found 10/30$275
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:00 amORD - GTF
2 stops15h 32mMultiple Airlines
Fri 11/2110:56 amGTF - ORD
1 stop17h 36mMultiple Airlines
Deal found 11/1$283
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:29 amMDW - GTF
2 stops8h 59mDelta
Tue 12/91:12 pmGTF - MDW
2 stops9h 35mDelta
Deal found 10/31$287
This Alaska Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:00 amORD - GTF
1 stop9h 10mAlaska Airlines
Sat 12/67:35 pmGTF - ORD
1 stop9h 46mAlaska Airlines
Deal found 11/1$296
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:20 amORD - GTF
1 stop6h 12mDelta
Sat 12/66:10 pmGTF - ORD
2 stops13h 32mDelta
Deal found 11/1$302
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:20 amORD - GTF
1 stop6h 11mDelta
Sat 12/136:10 pmGTF - ORD
2 stops13h 32mDelta
Deal found 10/30$317
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:00 amSTL - GTF
1 stop12h 55mHawaiian Airlines
Fri 12/127:35 pmGTF - STL
1 stop17h 52mHawaiian Airlines
Deal found 11/2$340
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/135:29 pmORD - GTF
1 stop6h 53mDelta
Sat 1/105:30 amGTF - ORD
1 stop6h 46mDelta
Deal found 11/2$361
This Alaska Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:00 amSTL - GTF
1 stop12h 55mAlaska Airlines
Fri 1/27:21 pmGTF - STL
1 stop20h 05mAlaska Airlines
Deal found 10/31$464

Cheap flight deals from Illinois to Great Falls

Keep the following information in mind while searching for Illinois to Great Falls flight deals. Data was last updated November 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$264
(Alaska Airlines)

One-way from

$180
(Alaska Airlines)

Popular in

August

Cheapest in

January

Average price

$335
Provider with most accurate pricing for Chicago (CHI)-Great Falls flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Great Falls flights.
Search Deals
From Illinois to Great Falls
Search Deals
One-way flight from Illinois to Great Falls
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Great Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 2, 2025.
Use the filters below to find and compare flights from Illinois to Great Falls that are best for you.

Fly from

Illinois

Fly to

Great Falls

Route

Depart

Return

Price

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Sat 12/6

8:00 am-6:55 pm

1 stop11h 55m

Great Falls

Tue 12/9

7:35 pm-2:39 pm

1 stop18h 04m

$264

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 12/5

6:00 am-6:55 pm

1 stop13h 55m

Great Falls

Tue 12/9

7:35 pm-2:39 pm

1 stop18h 04m

$264

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Wed 12/10

8:00 am-6:55 pm

1 stop11h 55m

Great Falls

Sat 12/13

7:35 pm-6:21 am

1 stop9h 46m

$264

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Sat 12/6

5:29 pm-11:22 pm

1 stop6h 53m

Great Falls

Tue 12/9

6:10 pm-8:39 am

2 stops13h 29m

$270

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 12/5

7:20 am-12:31 pm

1 stop6h 11m

Great Falls

Tue 12/9

6:10 pm-8:39 am

2 stops13h 29m

$272

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Sat 12/6

6:00 am-5:28 pm

2 stops12h 28m

Great Falls

Tue 12/9

1:12 pm-11:47 pm

2 stops9h 35m

$275

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Fri 12/5

6:00 am-5:28 pm

2 stops12h 28m

Great Falls

Tue 12/9

1:12 pm-11:47 pm

2 stops9h 35m

$275

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Wed 12/10

8:50 am-5:28 pm

2 stops9h 38m

Great Falls

Sat 12/13

6:10 pm-8:42 am

2 stops13h 32m

$275

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Mon 11/17

6:00 am-8:32 pm

2 stops15h 32m

Great Falls

Fri 11/21

10:56 am-5:32 am

1 stop17h 36m

$283

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Tue 11/18

10:00 am-6:10 pm

1 stop9h 10m

Great Falls

Sat 12/6

7:35 pm-6:21 am

1 stop9h 46m

$296

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/31

Showing 1-10 of 34 results
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Best time to book a flight from Illinois to Great Falls

Have a flexible travel schedule? Discover the best time to fly to Great Falls from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Great Falls

What is the cheapest time of day to fly from IL to GTF?

Find hourly flight availability from Illinois to Great Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 2, 2025.

One of the essential ways to save on airfare from Illinois to Great Falls is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 14% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Great Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Great Falls from Illinois?

    Great Falls (GTF), located 3.5 mi from the city center, is the airport you fly into when you book flights from Illinois to Great Falls.

  • How long is the flight from Illinois to Great Falls?

    Alaska Airlines, Delta, and Hawaiian Airlines can get you from Illinois to Great Falls in just under 6h 53m. Your travel time can differ by up to 6h 02m. The distance between Illinois and Great Falls is about 1207 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Illinois to Great Falls?

    While some choose either Chicago Midway - Great Falls or Lambert-St Louis - Great Falls, Chicago O'Hare Intl - Great Falls is the most popular route from Illinois to Great Falls.

  • Can I find deals for flights from Illinois to Great Falls that include hotel bookings?

    Yes. In addition to deals on Illinois to Great Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Great Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Great Falls.

  • Can I find deals for business class flights from Illinois to Great Falls?

    Yes. Cheapflights offers flight deals from Illinois to Great Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Illinois to Great Falls

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Illinois to Great Falls

Discover the top airline that operate flights from Illinois to Great Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$248Average$480FlexibilityNo cancel feeOn-time69%

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