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$96+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$210
(Hawaiian Airlines)

One-way from

$96
(United Airlines)

Popular in

December

Cheapest in

April

Average price

$369

Good round-trip deal

$225 or less

Good one-way deal

$174 or less
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. 9% potential increase in price ($47 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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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 July 31, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 9/68:00 amORD - BZN
1 stop7h 14mHawaiian Airlines
Fri 9/1211:26 amBZN - ORD
1 stop9h 41mHawaiian Airlines
Deal found 7/30$210
This American Airlines deal was found by Cheapflights users on 7/30. 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 8/278:46 pmORD - BIL
Nonstop3h 14mAmerican Airlines
Wed 9/312:19 pmBIL - ORD
Nonstop2h 54mAmerican Airlines
Deal found 7/30$210
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:20 pmORD - BZN
1 stop6h 57mAmerican Airlines
Thu 9/1112:44 pmBZN - ORD
1 stop9h 55mAmerican Airlines
Deal found 7/29$211
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:00 pmMDW - BZN
1 stop5h 25mSouthwest
Thu 10/168:00 pmBZN - MDW
1 stop8h 15mSouthwest
Deal found 7/30$211
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/277:15 amORD - BZN
1 stop7h 16mUnited Airlines
Wed 9/34:20 pmBZN - ORD
1 stop6h 39mUnited Airlines
Deal found 7/30$216
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/272:53 pmORD - BIL
1 stop6h 41mUnited Airlines
Wed 9/312:00 pmBIL - ORD
Nonstop3h 00mUnited Airlines
Deal found 7/30$220
This Mytrip deal was found by Cheapflights users on 7/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/148:12 pmORD - BZN
2 stops16h 30mMultiple Airlines
Fri 8/225:48 pmBZN - ORD
2 stops24h 19mMultiple Airlines
Deal found 7/31$224
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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.
Mon 9/156:20 amORD - BZN
1 stop8h 54mAlaska Airlines
Fri 9/263:08 pmBZN - ORD
1 stop7h 55mAlaska Airlines
Deal found 7/31$228
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 9/128:36 pmORD - MSO
Nonstop3h 42mAmerican Airlines
Tue 9/161:51 pmMSO - ORD
1 stop6h 54mAmerican Airlines
Deal found 7/30$230
This Netflights deal was found by Cheapflights users on 7/30. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:45 pmORD - MSO
1 stop7h 42mHawaiian Airlines
Sat 9/206:35 amMSO - ORD
1 stop6h 49mHawaiian Airlines
Deal found 7/30$236
This Delta deal was found by Cheapflights users on 7/30. 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 8/165:30 pmORD - BZN
1 stop6h 59mDelta
Sat 9/66:05 amBZN - ORD
1 stop4h 59mDelta
Deal found 7/30$237
This Delta deal was found by Cheapflights users on 7/30. 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.
Tue 8/196:04 amMDW - BZN
1 stop8h 04mDelta
Sat 8/236:05 amBZN - MDW
1 stop5h 58mDelta
Deal found 7/30$237

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 July 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

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sat 9/6

8:00 am-2:14 pm

1 stop7h 14m

Bozeman Gallatin Field

Fri 9/12

11:26 am-10:07 pm

1 stop9h 41m

$210

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Wed 8/27

8:46 pm-11:00 pm

Nonstop3h 14m

Billings Logan Intl

Wed 9/3

12:19 pm-4:13 pm

Nonstop2h 54m

$210

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Tue 10/14

7:00 pm-11:25 pm

1 stop5h 25m

Bozeman Gallatin Field

Thu 10/16

8:00 pm-5:15 am

1 stop8h 15m

$211

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Fri 9/5

1:20 pm-7:17 pm

1 stop6h 57m

Bozeman Gallatin Field

Thu 9/11

12:44 pm-11:39 pm

1 stop9h 55m

$211

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Wed 8/27

7:15 am-1:31 pm

1 stop7h 16m

Bozeman Gallatin Field

Wed 9/3

4:20 pm-11:59 pm

1 stop6h 39m

$216

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Wed 8/27

2:53 pm-8:34 pm

1 stop6h 41m

Billings Logan Intl

Wed 9/3

12:00 pm-4:00 pm

Nonstop3h 00m

$220

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 8/14

8:12 pm-11:42 am

2 stops16h 30m

Bozeman Gallatin Field

Fri 8/22

5:48 pm-7:07 pm

2 stops24h 19m

$224

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Mon 9/15

6:20 am-2:14 pm

1 stop8h 54m

Bozeman Gallatin Field

Fri 9/26

3:08 pm-12:03 am

1 stop7h 55m

$228

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Fri 9/12

8:36 pm-11:18 pm

Nonstop3h 42m

Missoula Johnson-Bell Field

Tue 9/16

1:51 pm-9:45 pm

1 stop6h 54m

$230

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Wed 9/17

5:45 pm-12:27 am

1 stop7h 42m

Missoula Johnson-Bell Field

Sat 9/20

6:35 am-2:24 pm

1 stop6h 49m

$236

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 May is currently the most expensive (average of $478). 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 July 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.

Weekly flight availability from Illinois to Montana

Explore weekly flight availability from Illinois to Montana. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 31, 2025.

The most flights from USIL to USMT are scheduled on a Thursday (9 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

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 July 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Illinois to Montana. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 United Airlines, which is currently one of the cheapest options available, starting at $96. Southwest flights start at $96 while deals on Alaska Airlines start at $100 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 May is currently the most expensive (average of $478). 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 5 airlines flying from Illinois to Montana

Discover the top 5 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$210Average$454FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$211Average$467FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$225Average$478FlexibilityNo cancel feeOn-time75%
DeltaCheapest$236Average$345FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$572FlexibilityNo cancel feeOn-time69%

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