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$105+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
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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 April 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$209
(American Airlines)

One-way from

$105
(Hawaiian Airlines)

Popular in

December

Cheapest in

April

Average price

$379

Good round-trip deal

$262 or less

Good one-way deal

$145 or less
Provider with most accurate pricing for Chicago (CHI)-Bozeman Gallatin Field flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Bozeman Gallatin Field flights.
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From Illinois to Montana
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One-way flight from Illinois to Montana
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Highest demand for flights based on searches. 6% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Illinois to Montana.
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Price to beat on a one-way flight from Illinois to Montana.
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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 April 22, 2025.

This American Airlines deal was found by Cheapflights users on 4/22. 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.
Sat 8/99:59 amORD - BIL
Nonstop3h 01mAmerican Airlines
Wed 8/1312:35 pmBIL - ORD
Nonstop2h 58mAmerican Airlines
Deal found 4/22$209
This American Airlines deal was found by Cheapflights users on 4/21. 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 6/89:40 amORD - MSO
Nonstop3h 44mAmerican Airlines
Tue 6/175:38 amMSO - ORD
Nonstop3h 29mAmerican Airlines
Deal found 4/21$221
This American Airlines deal was found by Cheapflights users on 4/22. 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 6/101:35 pmORD - FCA
Nonstop3h 34mAmerican Airlines
Tue 6/174:52 pmFCA - ORD
Nonstop3h 21mAmerican Airlines
Deal found 4/22$225
This Delta deal was found by Cheapflights users on 4/22. 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 6/132:00 pmORD - BIL
2 stops10h 11mDelta
Sun 6/155:20 amBIL - ORD
1 stop5h 32mDelta
Deal found 4/22$234
This United Airlines deal was found by Cheapflights users on 4/22. 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 6/108:50 amORD - FCA
Nonstop3h 53mUnited Airlines
Tue 6/175:08 pmFCA - ORD
1 stop6h 17mUnited Airlines
Deal found 4/22$235
This Delta deal was found by Cheapflights users on 4/22. 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.
Sun 6/88:29 amORD - MSO
1 stop7h 03mDelta
Tue 6/175:53 amMSO - ORD
1 stop5h 10mDelta
Deal found 4/22$239
This United Airlines deal was found by Cheapflights users on 4/22. 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 8/91:04 pmORD - BIL
1 stop5h 10mUnited Airlines
Wed 8/1312:50 pmBIL - ORD
Nonstop2h 55mUnited Airlines
Deal found 4/22$244
This Delta deal was found by Cheapflights users on 4/21. 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 6/57:15 pmORD - FCA
1 stop6h 15mDelta
Thu 6/121:39 pmFCA - ORD
1 stop7h 30mDelta
Deal found 4/21$245
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 9/108:42 pmORD - GTF
1 stop20h 01mAlaska Airlines
Tue 9/164:23 pmGTF - ORD
1 stop12h 17mAlaska Airlines
Deal found 4/21$256
This United Airlines deal was found by Cheapflights users on 4/21. 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 6/42:33 pmORD - GTF
1 stop7h 37mUnited Airlines
Wed 6/112:26 pmGTF - ORD
1 stop7h 15mUnited Airlines
Deal found 4/21$258
This Delta deal was found by Cheapflights users on 4/21. 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 - GTF
2 stops9h 46mDelta
Wed 6/116:00 amGTF - ORD
1 stop5h 03mDelta
Deal found 4/21$262
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Mon 6/308:50 amORD - MSO
Nonstop3h 48mUnited Airlines
Fri 7/115:20 pmMSO - ORD
1 stop6h 10mUnited Airlines
Deal found 4/22$263

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 April 22, 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

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Sat 8/9

9:59 am-12:00 pm

Nonstop3h 01m

Billings Logan Intl

Wed 8/13

12:35 pm-4:33 pm

Nonstop2h 58m

$209

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Sun 6/8

9:40 am-12:24 pm

Nonstop3h 44m

Missoula Johnson-Bell Field

Tue 6/17

5:38 am-10:07 am

Nonstop3h 29m

$221

ChicagoKalispell

ORD - FCA

ORDFCA

Chicago O'Hare Intl

Tue 6/10

1:35 pm-4:09 pm

Nonstop3h 34m

Kalispell Glacier Park

Tue 6/17

4:52 pm-9:13 pm

Nonstop3h 21m

$225

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Fri 6/13

2:00 pm-11:11 pm

2 stops10h 11m

Billings Logan Intl

Sun 6/15

5:20 am-11:52 am

1 stop5h 32m

$234

ChicagoKalispell

ORD - FCA

ORDFCA

Chicago O'Hare Intl

Tue 6/10

8:50 am-11:43 am

Nonstop3h 53m

Kalispell Glacier Park

Tue 6/17

5:08 pm-12:25 am

1 stop6h 17m

$235

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Sun 6/8

8:29 am-2:32 pm

1 stop7h 03m

Missoula Johnson-Bell Field

Tue 6/17

5:53 am-12:03 pm

1 stop5h 10m

$239

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Sat 8/9

1:04 pm-5:14 pm

1 stop5h 10m

Billings Logan Intl

Wed 8/13

12:50 pm-4:45 pm

Nonstop2h 55m

$244

ChicagoKalispell

ORD - FCA

ORDFCA

Chicago O'Hare Intl

Thu 6/5

7:15 pm-12:30 am

1 stop6h 15m

Kalispell Glacier Park

Thu 6/12

1:39 pm-10:09 pm

1 stop7h 30m

$245

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Wed 9/10

8:42 pm-3:43 pm

1 stop20h 01m

Great Falls

Tue 9/16

4:23 pm-5:40 am

1 stop12h 17m

$256

ChicagoGreat Falls

ORD - GTF

ORDGTF

Chicago O'Hare Intl

Wed 6/4

2:33 pm-9:10 pm

1 stop7h 37m

Great Falls

Wed 6/11

2:26 pm-10:41 pm

1 stop7h 15m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 60 results
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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 April 22, 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 April 22, 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
9,911 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,911 reviews
Alaska Airlines
8.0
Very good
9,911 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
9,911 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,911 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,392 reviews
Alaska Airlines
8.0
Very good
9,911 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,683 reviews
Alaska Airlines
8.0
Very good
9,911 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 Hawaiian Airlines, which is currently one of the cheapest options available, starting at $105. American Airlines flights start at $106 while deals on Alaska Airlines start at $111 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

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Alternative routes for Illinois to Montana

See prices for flight routes from nearby airports that may be better suited for you.
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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 April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$175Average$245FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$225Average$449FlexibilityNo cancel feeOn-time75%
DeltaCheapest$236Average$395FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$239Average$558FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$248Average$574FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$296Average$481FlexibilityNo cancel feeOn-time63%

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