HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Great Falls

$149+ 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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — GTF
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Great Falls with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$258
(Delta)

One-way from

$149
(Delta)

Popular in

June

Cheapest in

May

Average price

$419

Good round-trip deal

$573 or less
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. 9% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Great Falls.
Search Deals

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 March 31, 2025.

This Delta deal was found by Cheapflights users on 3/30. 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 6/74:30 pmORD - GTF
1 stop7h 01mDelta
Tue 6/1011:41 amGTF - ORD
1 stop5h 45mDelta
Deal found 3/30$258
This Delta deal was found by Cheapflights users on 3/30. 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 5/141:55 pmMDW - GTF
1 stop7h 37mDelta
Wed 5/216:00 amGTF - MDW
1 stop6h 15mDelta
Deal found 3/30$297
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/197:10 amORD - GTF
1 stop7h 26mUnited Airlines
Sat 7/262:35 pmGTF - ORD
1 stop6h 59mUnited Airlines
Deal found 3/30$317
This Hawaiian Airlines deal was found by Cheapflights users on 3/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/97:40 amORD - GTF
1 stop8h 32mHawaiian Airlines
Sun 4/133:52 pmGTF - ORD
1 stop7h 07mHawaiian Airlines
Deal found 3/30$348
This Alaska Airlines deal was found by Cheapflights users on 3/31. 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.
Thu 5/86:00 amORD - GTF
1 stop12h 27mAlaska Airlines
Fri 5/96:07 pmGTF - ORD
1 stop10h 58mAlaska Airlines
Deal found 3/31$353

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 March 31, 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 6/7

4:30 pm-10:31 pm

1 stop7h 01m

Great Falls

Tue 6/10

11:41 am-6:26 pm

1 stop5h 45m

$258

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Wed 5/14

1:55 pm-8:32 pm

1 stop7h 37m

Great Falls

Wed 5/21

6:00 am-1:15 pm

1 stop6h 15m

$297

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Sat 7/19

7:10 am-1:36 pm

1 stop7h 26m

Great Falls

Sat 7/26

2:35 pm-10:34 pm

1 stop6h 59m

$317

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Thu 5/8

6:00 am-5:27 pm

1 stop12h 27m

Great Falls

Fri 5/9

6:07 pm-6:05 am

1 stop10h 58m

$353

ChicagoGreat Falls

MDW - GTF

MDWGTF

Chicago Midway

Wed 6/4

1:55 pm-8:32 pm

1 stop7h 37m

$149

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Thu 5/1

11:53 am-4:44 pm

2 stops29h 51m

$190

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Wed 6/4

7:59 pm-4:29 pm

2 stops21h 30m

$217

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Wed 6/4

5:30 am-5:36 pm

2 stops13h 06m

$220

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Mon 9/1

8:00 am-3:43 pm

1 stop8h 43m

$224

PeoriaGreat Falls

PIA - GTF

PIAGTF

Greater Peoria

Thu 5/1

6:07 pm-4:44 pm

3 stops23h 37m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 13 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 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 June is currently the most expensive (average of $605). 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.

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 March 31, 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.

Rainfall in Great Falls by month

Plan your trip to Great Falls by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Great Falls ranges from 0.5 - 2.5 inches per month. June is typically the wettest month, when rainfall can reach 2.5 in. January is typically the driest time to visit Great Falls when rainfall is around 0.5 in.

Temperature in Great Falls by month

Plan your trip to Great Falls by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Great Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

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 March 31, 2025.
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,342 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 Delta ($149), Alaska Airlines ($217), and Hawaiian Airlines ($224).

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

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

  • What are the cheapest flights from Illinois to Great Falls?

    Looking for the cheapest flight from Illinois to Great Falls? While on average our users pay $842, our data indicates the cheapest price to be $541. The most popular route (Chicago O'Hare Intl - Great Falls), is priced around $258.

  • 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 June is currently the most expensive (average of $605). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Great Falls

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Bozeman flights
O'Hare Intl to Bozeman flights
O'Hare Intl to Kalispell flights
Dulles Intl to Bozeman flights
John F Kennedy Intl to Bozeman flights
Minneapolis to Bozeman flights
Los Angeles to Bozeman flights
Boston to Bozeman flights
Reagan-National to Bozeman flights
Baltimore to Bozeman flights
Atlanta to Bozeman flights
Los Angeles to Kalispell flights
San Francisco to Bozeman flights
LaGuardia to Bozeman flights
Dallas/Fort Worth to Kalispell flights
San Francisco to Kalispell flights
Dallas/Fort Worth to Bozeman flights
Minneapolis to Kalispell flights
Denver to Bozeman flights
John F Kennedy Intl to Kalispell flights
Denver to Kalispell flights
Newark to Kalispell flights
LaGuardia to Kalispell flights
San Diego to Kalispell flights
O'Hare Intl to Missoula flights
Hobby to Bozeman flights
Philadelphia to Bozeman flights
Midway to Bozeman flights
Seattle to Bozeman flights
John F Kennedy Intl to Missoula flights
Dulles Intl to Helena flights
Portland to Bozeman flights
Cleveland to Bozeman flights
Seattle to Kalispell flights
Reagan-National to Helena flights
Charlotte to Bozeman flights
Hartford to Bozeman flights
Dulles Intl to Kalispell flights
Detroit to Kalispell flights
Portland to Missoula flights
Raleigh to Bozeman flights
Newark to Missoula flights
George Bush Intcntl to Bozeman flights
Detroit to Bozeman flights
Midway to Kalispell flights
Dulles Intl to Missoula flights
San Francisco to Missoula flights
San Diego to Bozeman flights
Hartford to Kalispell flights
Philadelphia to Kalispell flights

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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$182Average$379FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$463FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.