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Illinois

$280+ Cheap flights from Great Falls (GTF) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — ORD
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheap flight deals from Great Falls to Illinois

Keep the following information in mind while searching for Great Falls to Illinois flight deals. Data was last updated septiembre 15, 2025.

Round-trip from

$298
(Delta)

Popular in

August

Cheapest in

December
From Great Falls to Illinois
Search Deals
Highest demand for flights based on searches. 30% potential increase in price ($243 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($52 potential savings vs. average RT price).
Search Deals

Find flight deals from Great Falls to Illinois

Cheapest flights from Great Falls to Illinois
Explore the most affordable flight options available from Great Falls to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.

This Delta deal was found by Cheapflights users on 9/14. 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.
mar. 9/305:40 amGTF - ORD
1 stop5h 13mDelta
sáb. 10/47:55 amORD - GTF
1 stop5h 30mDelta
Deal found 9/14$298
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/302:31 pmGTF - ORD
1 stop8h 28mUnited Airlines
vie. 10/32:53 pmORD - GTF
1 stop7h 18mUnited Airlines
Deal found 9/13$302
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/222:31 pmGTF - ORD
1 stop8h 28mUnited Airlines
mié. 10/298:47 amORD - GTF
1 stop5h 40mUnited Airlines
Deal found 9/15$334
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/172:31 pmGTF - ORD
1 stop7h 08mUnited Airlines
mar. 10/212:17 pmORD - GTF
1 stop7h 54mUnited Airlines
Deal found 9/13$344
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/142:31 pmGTF - ORD
1 stop7h 08mUnited Airlines
sáb. 10/187:10 amORD - GTF
1 stop7h 16mUnited Airlines
Deal found 9/13$356
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/172:31 pmGTF - ORD
1 stop8h 28mUnited Airlines
sáb. 10/187:10 amORD - GTF
1 stop7h 16mUnited Airlines
Deal found 9/13$366
This Delta deal was found by Cheapflights users on 9/15. 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.
mié. 10/221:08 pmGTF - ORD
1 stop7h 35mDelta
mié. 10/291:25 pmORD - GTF
2 stops10h 41mDelta
Deal found 9/15$377
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/147:00 amGTF - ORD
2 stops10h 50mUnited Airlines
mar. 10/212:17 pmORD - GTF
1 stop7h 54mUnited Airlines
Deal found 9/13$405
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/142:31 pmGTF - ORD
1 stop7h 08mUnited Airlines
lun. 10/202:53 pmORD - GTF
1 stop7h 18mUnited Airlines
Deal found 9/13$406
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/172:31 pmGTF - ORD
1 stop8h 28mUnited Airlines
lun. 10/202:53 pmORD - GTF
1 stop7h 18mUnited Airlines
Deal found 9/13$416
This Delta deal was found by Cheapflights users on 9/14. 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.
mar. 9/305:40 amGTF - MDW
2 stops10h 55mDelta
sáb. 10/41:43 pmMDW - GTF
2 stops9h 45mDelta
Deal found 9/14$669
This Delta deal was found by Cheapflights users on 9/15. 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.
mié. 9/175:40 amGTF - MDW
2 stops10h 55mDelta
sáb. 9/209:20 amMDW - GTF
2 stops9h 07mDelta
Deal found 9/15$1,496

Cheapflights Fare Finder

 
Customize your flight search to find flights from Great Falls to Illinois 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 septiembre 15, 2025.
Use the filters below to find and compare flights from Great Falls to Illinois that are best for you.

Fly from

Great Falls

Fly to

Illinois

Route

Depart

Return

Price

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

mar. 3/3

1:10 pm-9:55 pm

1 stop7h 45m

Chicago O'Hare Intl

mié. 3/4

7:30 am-5:44 pm

2 stops11h 14m

$280

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

mar. 9/30

5:40 am-11:53 am

1 stop5h 13m

Chicago O'Hare Intl

sáb. 10/4

7:55 am-12:25 pm

1 stop5h 30m

$298

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

mar. 9/30

2:31 pm-11:59 pm

1 stop8h 28m

Chicago O'Hare Intl

vie. 10/3

2:53 pm-9:11 pm

1 stop7h 18m

$302

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

mar. 3/3

4:00 pm-11:59 pm

1 stop6h 59m

Chicago O'Hare Intl

mié. 3/4

7:45 am-3:20 pm

1 stop8h 35m

$306

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

mié. 10/22

2:31 pm-11:59 pm

1 stop8h 28m

Chicago O'Hare Intl

mié. 10/29

8:47 am-1:27 pm

1 stop5h 40m

$334

Great FallsChicago

GTF - MDW

GTFMDW

Great Falls

mar. 3/3

5:30 am-6:08 pm

2 stops11h 38m

Chicago Midway

mié. 3/4

9:30 am-5:44 pm

2 stops9h 14m

$464

Great FallsChicago

GTF - MDW

GTFMDW

Great Falls

mar. 9/30

5:40 am-5:35 pm

2 stops10h 55m

Chicago Midway

sáb. 10/4

1:43 pm-10:28 pm

2 stops9h 45m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Best time to book a flight from Great Falls to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Great Falls 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 Great Falls to Illinois
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated septiembre 15, 2025.
Read through reviews of airlines operating flights from Great Falls to Illinois, such as Alaska Airlines, Delta, and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,954 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,929 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Great Falls to Illinois. 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 from for flights from Great Falls to Illinois?

    Great Falls (GTF) is the airport you will fly out of if you book a flight from Great Falls to Illinois. It is only a 3.5 mi journey to Great Falls (GTF) from Great Falls’s city center.

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

    Departing from Great Falls to Illinois will take you 6h 59m. The distance from Great Falls to Illinois is about 1207 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Great Falls to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Great Falls to Illinois (average of $245). Flying from Great Falls to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Great Falls to Illinois

Discover the top 2 airlines that operate flights from Great Falls to Illinois. 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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$277Average$678FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$430Average$588FlexibilityNo cancel feeOn-time75%

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