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$104+ Cheap flights from Illinois to Bozeman (BZN)

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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Illinois to Bozeman

Cheapest flights from Illinois to Bozeman
Explore the most affordable flight options available from Illinois to Bozeman. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 11/209:15 amORD - BZN
Nonstop3h 28mUnited Airlines
Thu 11/2712:45 pmBZN - ORD
Nonstop2h 59mUnited Airlines
Deal found 10/28$189
This American Airlines deal was found by Cheapflights users on 10/29. 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 12/55:18 amORD - BZN
1 stop8h 36mAmerican Airlines
Mon 12/81:46 pmBZN - ORD
1 stop7h 32mAmerican Airlines
Deal found 10/29$209
This Southwest deal was found by Cheapflights users on 10/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/209:40 amMDW - BZN
1 stop6h 45mSouthwest
Thu 11/2712:25 pmBZN - MDW
1 stop5h 00mSouthwest
Deal found 10/29$209
This Southwest deal was found by Cheapflights users on 10/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:30 amSTL - BZN
1 stop5h 05mSouthwest
Wed 12/105:30 amBZN - STL
1 stop6h 50mSouthwest
Deal found 10/29$211
This Southwest deal was found by Cheapflights users on 10/28. 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.
Fri 12/126:35 pmMDW - BZN
1 stop6h 40mSouthwest
Mon 12/1510:45 amBZN - MDW
1 stop10h 25mSouthwest
Deal found 10/28$214
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 12/187:58 pmORD - BZN
Nonstop3h 31mUnited Airlines
Sun 12/214:14 pmBZN - ORD
Nonstop3h 11mUnited Airlines
Deal found 10/28$216
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/68:00 amSTL - BZN
2 stops8h 31mUnited Airlines
Wed 12/102:42 pmBZN - STL
1 stop5h 15mUnited Airlines
Deal found 10/29$216
This Delta deal was found by Cheapflights users on 10/29. 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.
Thu 11/202:12 pmORD - BZN
1 stop9h 17mDelta
Thu 11/275:30 amBZN - ORD
1 stop7h 14mDelta
Deal found 10/29$217
This Delta deal was found by Cheapflights users on 10/27. 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 12/57:02 pmMDW - BZN
1 stop5h 35mDelta
Mon 12/82:36 pmBZN - MDW
1 stop8h 11mDelta
Deal found 10/27$217
This Delta deal was found by Cheapflights users on 10/27. 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 12/51:35 pmORD - BZN
2 stops9h 51mDelta
Mon 12/87:25 amBZN - ORD
1 stop8h 50mDelta
Deal found 10/27$222
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/135:18 amORD - BZN
1 stop8h 43mAmerican Airlines
Mon 11/171:52 pmBZN - ORD
1 stop7h 28mAmerican Airlines
Deal found 10/27$224
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1812:45 pmORD - BZN
Nonstop3h 25mUnited Airlines
Sun 12/286:15 amBZN - ORD
1 stop6h 04mUnited Airlines
Deal found 10/29$226

Cheap flight deals from Illinois to Bozeman

Keep the following information in mind while searching for Illinois to Bozeman flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(American Airlines)

One-way from

$104
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$383

Good round-trip deal

$269 or less

Good one-way deal

$175 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 Bozeman Gallatin Field
Search Deals
One-way flight from Illinois to Bozeman Gallatin Field
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Bozeman Gallatin Field.
Search Deals
Price to beat on a one-way flight from Illinois to Bozeman Gallatin Field.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Bozeman 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 October 30, 2025.
Use the filters below to find and compare flights from Illinois to Bozeman that are best for you.

Fly from

Illinois

Fly to

Bozeman

Route

Depart

Return

Price

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Tue 1/13

5:35 pm-10:15 pm

1 stop5h 40m

Bozeman Gallatin Field

Sat 1/17

10:35 am-7:45 pm

1 stop8h 10m

$209

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Thu 11/20

5:15 am-11:55 am

1 stop7h 40m

Bozeman Gallatin Field

Thu 11/27

12:25 pm-6:25 pm

1 stop5h 00m

$209

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 1/7

6:20 am-10:30 am

1 stop5h 10m

Bozeman Gallatin Field

Sun 1/11

3:30 pm-11:35 pm

1 stop7h 05m

$209

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sun 1/25

5:00 am-12:05 pm

1 stop8h 05m

Bozeman Gallatin Field

Mon 2/2

3:50 pm-9:45 pm

1 stop4h 55m

$211

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sat 12/13

5:30 am-9:35 am

1 stop5h 05m

Bozeman Gallatin Field

Thu 12/18

5:00 am-12:10 pm

1 stop6h 10m

$211

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Fri 12/12

6:35 pm-12:15 am

1 stop6h 40m

Bozeman Gallatin Field

Mon 12/15

10:45 am-10:10 pm

1 stop10h 25m

$214

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Fri 12/5

6:00 pm-10:45 pm

1 stop5h 45m

Bozeman Gallatin Field

Mon 12/8

5:30 am-12:35 pm

2 stops6h 05m

$214

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sat 12/6

8:00 am-3:31 pm

2 stops8h 31m

Bozeman Gallatin Field

Wed 12/10

2:42 pm-8:57 pm

1 stop5h 15m

$216

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Mon 1/5

6:43 pm-11:17 pm

1 stop5h 34m

Bozeman Gallatin Field

Sat 1/10

2:39 pm-11:57 pm

1 stop8h 18m

$217

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 11/20

7:47 am-2:20 pm

1 stop7h 33m

Bozeman Gallatin Field

Thu 11/27

5:30 am-1:44 pm

1 stop7h 14m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Bozeman

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Bozeman (average of $191). Flying from Illinois to Bozeman in March is currently the most expensive (average of $289). 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 BZN?

Find hourly flight availability from Illinois to Bozeman. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s typically best to fly out from Illinois to Bozeman in the evening. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Illinois to Bozeman?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Bozeman. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Bozeman flight should consider departing on Sunday at noon when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Illinois to Bozeman?

Related info for your journey

Find useful and relevant information for your journey from Illinois to Bozeman. 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 Bozeman from Illinois?

    Bozeman Gallatin Field (BZN), located 8.7 mi from the city center, is the airport you fly into when you book flights from Illinois to Bozeman.

  • How long is the flight from Illinois to Bozeman?

    For as low as $217, Southwest can have you in Bozeman from Illinois in 5h 34m. Illinois and Bozeman are separated by a distance of 1182 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $104. Southwest flights start at $105 while deals on Delta start at $139 one-way.

  • What are the most popular routes from Illinois to Bozeman?

    When deciding which route to take from Illinois to Bozeman consider Chicago O'Hare Intl - Bozeman Gallatin Field, Chicago Midway - Bozeman Gallatin Field or Lambert-St Louis - Bozeman Gallatin Field as they are the most popular.

  • What are the most reliable airlines from Illinois to Bozeman?

    The top 3 most reliable airlines when flying from Illinois to Bozeman are Alaska Airlines (77%), SkyWest Airlines (75%) and American Airlines (72%).

  • What are the cheapest flights from Illinois to Bozeman?

    The cheapest flight price from Illinois to Bozeman is $135. On average you can expect to pay $258. The most popular route, (Chicago O'Hare Intl - Bozeman Gallatin Field), can usually be booked for $189.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Illinois to Bozeman (average of $191). Flying from Illinois to Bozeman in March is currently the most expensive (average of $289). 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 Bozeman?

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Alternative routes for Illinois to Bozeman

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Top 5 airlines flying from Illinois to Bozeman

Discover the top 5 airlines that operate flights from Illinois to Bozeman. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$152Average$436FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$211Average$370FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$232Average$458FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$340FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$291Average$504FlexibilityNo cancel feeOn-time75%

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