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Great Falls

$127+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — GTF
Jul 21 — Jul 281
Mon 7/21
Mon 7/28
1 adult, Economy
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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 July 16, 2025.

Round-trip from

$262
(Mytrip)

One-way from

$127
(Alaska Airlines)

Popular in

October

Cheapest in

January

Average price

$478
From Illinois to Great Falls
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One-way flight from Illinois to Great Falls
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Highest demand for flights based on searches. 3% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 16, 2025.

This Mytrip deal was found by Cheapflights users on 7/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:00 amORD - GTF
1 stop12h 17mMultiple Airlines
Fri 9/510:21 pmGTF - ORD
1 stop12h 15mMultiple Airlines
Deal found 7/15$262
This United Airlines deal was found by Cheapflights users on 7/15. 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.
Sat 8/2310:49 amPIA - GTF
2 stops11h 39mUnited Airlines
Tue 8/267:00 amGTF - PIA
2 stops8h 43mUnited Airlines
Deal found 7/15$339
This United Airlines deal was found by Cheapflights users on 7/16. 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.
Sun 8/108:45 amORD - GTF
1 stop5h 51mUnited Airlines
Wed 8/132:35 pmGTF - ORD
1 stop7h 04mUnited Airlines
Deal found 7/16$344
This Delta deal was found by Cheapflights users on 7/14. 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.
Sat 10/256:15 pmSTL - GTF
1 stop5h 36mDelta
Wed 10/296:20 pmGTF - STL
1 stop5h 17mDelta
Deal found 7/14$386
This Mytrip deal was found by Cheapflights users on 7/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/310:47 amSTL - GTF
2 stops23h 37mMultiple Airlines
Fri 8/810:14 amGTF - STL
3 stops27h 25mMultiple Airlines
Deal found 7/14$391
This Delta deal was found by Cheapflights users on 7/14. 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.
Thu 8/282:00 pmORD - GTF
2 stops9h 45mDelta
Thu 9/411:43 amGTF - ORD
1 stop8h 17mDelta
Deal found 7/14$392
This Delta deal was found by Cheapflights users on 7/15. 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.
Tue 8/121:08 pmMDW - GTF
2 stops10h 37mDelta
Tue 8/196:00 amGTF - MDW
1 stop6h 03mDelta
Deal found 7/15$394
This Alaska Airlines deal was found by Cheapflights users on 7/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/88:42 pmORD - GTF
1 stop20h 31mAlaska Airlines
Mon 8/114:55 pmGTF - ORD
1 stop11h 45mAlaska Airlines
Deal found 7/15$404
This Alaska Airlines deal was found by Cheapflights users on 7/16. 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.
Mon 9/13:35 pmSTL - GTF
1 stop25h 14mAlaska Airlines
Tue 9/94:29 pmGTF - STL
1 stop21h 10mAlaska Airlines
Deal found 7/16$406
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Tue 8/124:45 pmSTL - GTF
1 stop5h 28mUnited Airlines
Tue 8/192:35 pmGTF - STL
1 stop5h 11mUnited Airlines
Deal found 7/13$466
This Delta deal was found by Cheapflights users on 7/14. 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.
Sat 8/236:05 amBMI - GTF
2 stops12h 21mDelta
Tue 8/266:06 pmGTF - BMI
2 stops20h 01mDelta
Deal found 7/14$641

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 July 16, 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

Fri 8/29

6:00 am-5:17 pm

1 stop12h 17m

Great Falls

Fri 9/5

10:21 pm-11:36 am

1 stop12h 15m

$262

PeoriaGreat Falls

PIA - GTF

PIAGTF

Greater Peoria

Sat 8/23

10:49 am-9:28 pm

2 stops11h 39m

Great Falls

Tue 8/26

7:00 am-4:43 pm

2 stops8h 43m

$339

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Sun 8/10

8:45 am-1:36 pm

1 stop5h 51m

Great Falls

Wed 8/13

2:35 pm-10:39 pm

1 stop7h 04m

$344

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sun 8/3

10:47 am-9:24 am

2 stops23h 37m

Great Falls

Fri 8/8

10:14 am-2:39 pm

3 stops27h 25m

$391

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Thu 8/28

2:00 pm-10:45 pm

2 stops9h 45m

Great Falls

Thu 9/4

11:43 am-9:00 pm

1 stop8h 17m

$392

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Tue 8/12

1:08 pm-10:45 pm

2 stops10h 37m

Great Falls

Tue 8/19

6:00 am-1:03 pm

1 stop6h 03m

$394

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Fri 8/8

8:42 pm-4:13 pm

1 stop20h 31m

Great Falls

Mon 8/11

4:55 pm-5:40 am

1 stop11h 45m

$404

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Mon 9/1

3:35 pm-3:49 pm

1 stop25h 14m

Great Falls

Tue 9/9

4:29 pm-2:39 pm

1 stop21h 10m

$406

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 8/12

2:15 pm-10:45 pm

2 stops9h 30m

Great Falls

Tue 8/19

11:43 am-6:16 pm

1 stop5h 33m

$439

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Tue 8/12

4:45 pm-9:13 pm

1 stop5h 28m

Great Falls

Tue 8/19

2:35 pm-8:46 pm

1 stop5h 11m

$466

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

Showing 1-10 of 20 results
1
2

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 July 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Great Falls as you normally would.

Reviews of airlines servicing Great Falls

Get insights into the airlines that provide service to Great Falls. 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 Great Falls. Reviews last updated July 16, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Illinois to Great Falls. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,580 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,863 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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.

  • What are the cheapest airlines to fly from Illinois to Great Falls one-way?

    The cheapest airlines for a one-way flight from Illinois to Great Falls are Alaska Airlines ($127), Delta ($195), and Hawaiian Airlines ($234).

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

    While some choose either Chicago O'Hare Intl - Great Falls or Chicago Midway - Great Falls, Lambert-St Louis - 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.

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

    Currently, January is the cheapest month in which you can book a flight from Illinois to Great Falls (average of $367). Flying from Illinois to Great Falls in July is currently the most expensive (average of $574). 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

Traveling to a place near Great Falls?

Book flights to Great Falls if you plan to visit one of these locations
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Top 2 airlines flying from Illinois to Great Falls

Discover the top 2 airlines 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 July 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$225Average$323FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$248Average$459FlexibilityNo cancel feeOn-time69%

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