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Bozeman

$95+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/17. 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 12/259:00 amSTL - BZN
1 stop7h 27mUnited Airlines
Sat 12/277:15 amBZN - STL
1 stop8h 12mUnited Airlines
Deal found 12/17$319
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/249:55 amSTL - BZN
2 stops12h 13mUnited Airlines
Mon 12/294:14 pmBZN - STL
1 stop5h 29mUnited Airlines
Deal found 12/17$324
This American Airlines deal was found by Cheapflights users on 12/14. 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 12/238:25 amORD - BZN
Nonstop3h 44mAmerican Airlines
Sun 12/2811:39 amBZN - ORD
Nonstop3h 10mAmerican Airlines
Deal found 12/14$329
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/217:58 pmORD - BZN
Nonstop3h 31mUnited Airlines
Thu 1/17:15 amBZN - ORD
Nonstop3h 19mUnited Airlines
Deal found 12/14$346
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/256:00 amMLI - BZN
1 stop6h 09mAmerican Airlines
Mon 12/2911:39 amBZN - MLI
1 stop6h 38mAmerican Airlines
Deal found 12/17$359
This Delta deal was found by Cheapflights users on 12/17. 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 12/256:05 amSTL - BZN
1 stop8h 10mDelta
Sun 12/282:20 pmBZN - STL
1 stop6h 56mDelta
Deal found 12/17$369
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/237:58 pmORD - BZN
Nonstop3h 31mUnited Airlines
Sat 12/274:14 pmBZN - ORD
Nonstop3h 11mUnited Airlines
Deal found 12/15$379
This Southwest deal was found by Cheapflights users on 12/14. 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 12/255:15 amMDW - BZN
1 stop7h 40mSouthwest
Mon 12/295:30 pmBZN - MDW
1 stop5h 10mSouthwest
Deal found 12/14$379
This American Airlines deal was found by Cheapflights users on 12/16. 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 12/258:25 amORD - BZN
Nonstop3h 44mAmerican Airlines
Wed 12/311:34 pmBZN - ORD
Nonstop3h 20mAmerican Airlines
Deal found 12/16$384
This Southwest deal was found by Cheapflights users on 12/17. 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 12/255:00 amSTL - BZN
1 stop7h 55mSouthwest
Sun 12/2810:15 amBZN - STL
2 stops7h 55mSouthwest
Deal found 12/17$400
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/256:41 amSTL - BZN
1 stop9h 43mUnited Airlines
Mon 12/296:15 amBZN - STL
2 stops9h 12mUnited Airlines
Deal found 12/17$407
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/2512:45 pmORD - BZN
Nonstop3h 25mUnited Airlines
Wed 12/314:14 pmBZN - ORD
Nonstop3h 11mUnited Airlines
Deal found 12/15$409

Find flight deals from Illinois to Bozeman

Keep the following information in mind while searching for Illinois to Bozeman flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(Southwest)

One-way from

$95
(Southwest)

Popular in

March

Cheapest in

September

Average price

$449

Good round-trip deal

$285 or less

Good one-way deal

$135 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.
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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. 11% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 18, 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

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 1/14

6:20 am-10:30 am

1 stop5h 10m

Bozeman Gallatin Field

Wed 1/21

7:40 am-1:55 pm

1 stop5h 15m

$211

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Mon 1/12

6:00 am-1:19 pm

1 stop8h 19m

Bozeman Gallatin Field

Wed 1/14

2:13 pm-10:55 pm

1 stop7h 42m

$211

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 1/29

3:35 pm-11:56 pm

1 stop9h 21m

Bozeman Gallatin Field

Wed 2/4

7:20 am-5:10 pm

1 stop8h 50m

$228

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 1/29

3:35 pm-11:56 pm

1 stop9h 21m

Bozeman Gallatin Field

Mon 2/2

3:03 pm-11:50 pm

1 stop7h 47m

$228

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sun 3/29

1:18 pm-5:58 pm

1 stop5h 40m

Bozeman Gallatin Field

Wed 4/1

5:20 am-12:23 pm

1 stop6h 03m

$233

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Thu 2/12

2:47 pm-11:56 pm

1 stop10h 09m

Bozeman Gallatin Field

Mon 2/16

7:00 am-11:59 pm

1 stop15h 59m

$245

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Tue 1/13

2:36 pm-9:33 pm

1 stop7h 57m

Bozeman Gallatin Field

Sat 1/17

4:16 pm-11:59 pm

1 stop6h 43m

$249

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Fri 2/20

2:20 pm-10:25 pm

1 stop9h 05m

Bozeman Gallatin Field

Tue 2/24

3:05 pm-11:52 pm

1 stop7h 47m

$249

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Tue 3/3

2:02 pm-9:12 pm

1 stop8h 10m

Bozeman Gallatin Field

Sat 3/7

4:30 pm-10:55 pm

1 stop5h 25m

$249

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Mon 3/30

7:20 am-2:34 pm

1 stop8h 14m

Bozeman Gallatin Field

Thu 4/2

5:20 am-12:23 pm

1 stop6h 03m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 59 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, October is the cheapest month in which you can book a flight from Illinois to Bozeman (average of $190). Flying from Illinois to Bozeman in March is currently the most expensive (average of $290). 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 December 18, 2025.

It’s typically best to fly out from Illinois to Bozeman in the evening. Doing so could potentially save you 33% 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.

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 $211, Southwest can have you in Bozeman from Illinois in 5h 10m. Illinois and Bozeman are separated by a distance of 1163 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 Southwest, which is currently one of the cheapest options available, starting at $95. American Airlines flights start at $105 while deals on Delta start at $108 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 United Airlines (77%), Lufthansa (70%) and Alaska Airlines (55%).

  • 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 $270. The most popular route, (Chicago O'Hare Intl - Bozeman Gallatin Field), can usually be booked for $229.

  • 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, October is the cheapest month in which you can book a flight from Illinois to Bozeman (average of $190). Flying from Illinois to Bozeman in March is currently the most expensive (average of $290). 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?

Book flights to Bozeman if you plan to visit one of these locations
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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$152Average$448FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$211Average$359FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$232Average$451FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$308FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$291Average$504FlexibilityNo cancel feeOn-time75%

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