HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Montana

$106+ Cheap flights from Illinois to Montana

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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
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 Montana 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 Montana

Keep the following information in mind while searching for Illinois to Montana flight deals. Data was last updated March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$225
(American Airlines)

One-way from

$107
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$472

Good round-trip deal

$310 or less

Good one-way deal

$191 or less
Provider with most accurate pricing for Chicago (CHI)-Bozeman Gallatin Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Bozeman Gallatin Field flights.
Search Deals
From Illinois to Montana
Search Deals
One-way flight from Illinois to Montana
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 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 Montana.
Search Deals
Price to beat on a one-way flight from Illinois to Montana.
Search Deals

Find flight deals from Illinois to Montana

Cheapest flights from Illinois to Montana
Explore the most affordable flight options available from Illinois to Montana. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/101:31 pmORD - FCA
Nonstop3h 40mAmerican Airlines
Thu 8/144:53 pmFCA - ORD
Nonstop3h 24mAmerican Airlines
Deal found 3/30$225
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/228:45 pmORD - BIL
Nonstop3h 22mAmerican Airlines
Tue 7/296:00 amBIL - ORD
Nonstop2h 54mAmerican Airlines
Deal found 3/31$229
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/238:38 pmORD - MSO
Nonstop3h 55mAmerican Airlines
Wed 7/305:07 amMSO - ORD
Nonstop3h 24mAmerican Airlines
Deal found 3/30$229
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/288:45 amORD - BIL
1 stop5h 32mUnited Airlines
Mon 6/212:30 pmBIL - ORD
Nonstop2h 55mUnited Airlines
Deal found 3/31$239
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 6/47:30 amORD - FCA
1 stop6h 23mDelta
Mon 6/95:30 amFCA - ORD
1 stop5h 23mDelta
Deal found 3/30$245
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.
Wed 4/236:00 amORD - MSO
1 stop8h 58mAlaska Airlines
Mon 4/286:36 pmMSO - ORD
1 stop10h 29mAlaska Airlines
Deal found 3/31$248
This Delta deal was found by Cheapflights users on 3/29. 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 8/166:45 pmMDW - BIL
1 stop4h 53mDelta
Wed 8/206:25 amBIL - MDW
1 stop5h 37mDelta
Deal found 3/29$249
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 9/175:20 pmORD - MSO
1 stop7h 37mDelta
Sat 9/205:50 amMSO - ORD
1 stop8h 06mDelta
Deal found 3/30$249
This Delta deal was found by Cheapflights users on 3/29. 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 6/41:45 pmORD - BIL
2 stops10h 13mDelta
Mon 6/95:30 amBIL - ORD
1 stop5h 23mDelta
Deal found 3/29$254
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.
Tue 8/57:42 pmORD - FCA
Nonstop4h 06mUnited Airlines
Tue 8/125:14 pmFCA - ORD
1 stop6h 16mUnited Airlines
Deal found 3/30$256
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:59 pmORD - MSO
2 stops26h 17mMultiple Airlines
Mon 5/124:16 pmMSO - ORD
1 stop17h 39mMultiple Airlines
Deal found 3/30$257
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.
Wed 7/238:50 amORD - MSO
Nonstop3h 48mUnited Airlines
Tue 7/295:20 pmMSO - ORD
1 stop6h 10mUnited Airlines
Deal found 3/30$264

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Montana 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 Montana that are best for you.

Fly from

Illinois

Fly to

Montana

Route

Depart

Return

Price

ChicagoKalispell

ORD - FCA

ORDFCA

Chicago O'Hare Intl

Sun 8/10

1:31 pm-4:11 pm

Nonstop3h 40m

Kalispell Glacier Park

Thu 8/14

4:53 pm-9:17 pm

Nonstop3h 24m

$225

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Tue 7/22

8:45 pm-11:07 pm

Nonstop3h 22m

Billings Logan Intl

Tue 7/29

6:00 am-9:54 am

Nonstop2h 54m

$229

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Wed 7/23

8:38 pm-11:33 pm

Nonstop3h 55m

Missoula Johnson-Bell Field

Wed 7/30

5:07 am-9:31 am

Nonstop3h 24m

$229

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Wed 5/28

8:45 am-1:17 pm

1 stop5h 32m

Billings Logan Intl

Mon 6/2

12:30 pm-4:25 pm

Nonstop2h 55m

$239

ChicagoKalispell

ORD - FCA

ORDFCA

Chicago O'Hare Intl

Wed 6/4

7:30 am-12:53 pm

1 stop6h 23m

Kalispell Glacier Park

Tue 6/10

1:39 pm-10:10 pm

1 stop7h 31m

$245

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Wed 4/23

6:00 am-1:58 pm

1 stop8h 58m

Missoula Johnson-Bell Field

Mon 4/28

6:36 pm-6:05 am

1 stop10h 29m

$248

ChicagoBillings

MDW - BIL

MDWBIL

Chicago Midway

Sat 8/16

6:45 pm-10:38 pm

1 stop4h 53m

Billings Logan Intl

Wed 8/20

6:25 am-1:02 pm

1 stop5h 37m

$249

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Wed 9/17

5:20 pm-11:57 pm

1 stop7h 37m

Missoula Johnson-Bell Field

Sat 9/20

5:50 am-2:56 pm

1 stop8h 06m

$249

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Wed 6/4

1:45 pm-10:58 pm

2 stops10h 13m

Billings Logan Intl

Mon 6/9

5:30 am-11:53 am

1 stop5h 23m

$254

ChicagoKalispell

ORD - FCA

ORDFCA

Chicago O'Hare Intl

Tue 8/5

7:42 pm-10:48 pm

Nonstop4h 06m

Kalispell Glacier Park

Tue 8/12

5:14 pm-12:30 am

1 stop6h 16m

$256

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Illinois to Montana

Have a flexible travel schedule? Discover the best time to fly to Montana 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 Montana

What is the cheapest month to book a flight from Illinois to Montana?

Currently, October is the cheapest month in which you can book a flight from Illinois to Montana (average of $371). Flying from Illinois to Montana in June is currently the most expensive (average of $520). 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 MT?

Find hourly flight availability from Illinois to Montana. 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 Montana as you normally would.

Rainfall in Montana by month

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

In terms of precipitation, rainfall in Montana ranges from 0.4 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Montana when rainfall is around 0.4 in.

Temperature in Montana by month

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

If weather is an important factor for your trip to Montana, 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 64.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

Reviews of airlines servicing Montana

Get insights into the airlines that provide service to Montana. 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 Montana. Reviews last updated March 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Illinois to Montana have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.1

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

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.1

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
Southwest
8.0
Very good
4,276 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.1

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

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.1

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

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.1

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

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.1

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 Montana. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $107. Southwest flights start at $111 while deals on Delta start at $119 one-way.

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

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

  • How can I find direct flights from Illinois to Montana?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Montana 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 Montana?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Montana (average of $371). Flying from Illinois to Montana in June is currently the most expensive (average of $520). 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 Montana

See prices for flight routes from nearby airports that may be better suited for you.
LaGuardia to Miami flights
Newark to Fort Lauderdale flights
Newark to Miami flights
LaGuardia to Fort Lauderdale flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
Los Angeles to John F Kennedy Intl flights
John F Kennedy Intl to Miami flights
Newark to Orlando flights
Newark to Las Vegas flights
Dallas/Fort Worth to Seattle flights
LaGuardia to Orlando flights
Dallas/Fort Worth to LaGuardia flights
LaGuardia to Dallas/Fort Worth flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Orlando flights
Newark to Los Angeles flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
Dallas/Fort Worth to O'Hare Intl flights
Newark to Seattle flights
Dallas/Fort Worth to Las Vegas flights
Newark to Dallas/Fort Worth flights
LaGuardia to Atlanta flights
Denver to Las Vegas flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to Seattle flights
Newark to Tampa flights
Dallas/Fort Worth to Newark flights
John F Kennedy Intl to San Francisco flights
Seattle to Las Vegas flights
LaGuardia to O'Hare Intl flights
John F Kennedy Intl to West Palm Beach flights
San Francisco to Newark flights
Dallas/Fort Worth to Orlando flights
Seattle to Newark flights
Atlanta to LaGuardia flights
John F Kennedy Intl to Sky Harbor Intl flights
O'Hare Intl to LaGuardia flights
Los Angeles to LaGuardia flights
Los Angeles to Seattle flights
Newark to New Orleans flights
LaGuardia to Las Vegas flights
John F Kennedy Intl to O'Hare Intl flights
LaGuardia to Los Angeles flights
O'Hare Intl to Dallas/Fort Worth flights
Seattle to Los Angeles flights
John F Kennedy Intl to Denver flights
Atlanta to Las Vegas flights

Top 6 airlines flying from Illinois to Montana

Discover the top 6 airlines that operate flights from Illinois to Montana. 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
Sun Country AirCheapest$175Average$245FlexibilityNo cancel feeOn-time83%
DeltaCheapest$182Average$400FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$239Average$530FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$248Average$555FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$267Average$482FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$296Average$481FlexibilityNo cancel feeOn-time63%
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.