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$95+ Cheap flights from Bozeman (BZN) to Illinois

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.
BZN — ORD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Bozeman to Illinois

Cheapest flights from Bozeman to Illinois
Explore the most affordable flight options available from Bozeman to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/25. 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 12/2812:42 pmBZN - ORD
Nonstop3h 09mUnited Airlines
Sat 1/312:45 pmORD - BZN
Nonstop3h 25mUnited Airlines
Deal found 12/25$434
This American Airlines deal was found by Cheapflights users on 12/26. 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 12/283:44 pmBZN - ORD
1 stop6h 31mAmerican Airlines
Sat 1/38:25 amORD - BZN
Nonstop3h 44mAmerican Airlines
Deal found 12/26$444
This Southwest deal was found by Cheapflights users on 12/25. 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.
Sun 12/285:30 pmBZN - MDW
1 stop5h 10mSouthwest
Sat 1/37:00 pmMDW - BZN
1 stop6h 35mSouthwest
Deal found 12/25$454
This Delta deal was found by Cheapflights users on 12/25. 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 12/282:20 pmBZN - ORD
1 stop6h 14mDelta
Sat 1/37:05 pmORD - BZN
1 stop5h 41mDelta
Deal found 12/25$454
This United Airlines deal was found by Cheapflights users on 12/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/294:14 pmBZN - ORD
Nonstop3h 11mUnited Airlines
Thu 1/19:00 amORD - BZN
Nonstop3h 33mUnited Airlines
Deal found 12/27$489
This American Airlines deal was found by Cheapflights users on 12/27. 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.
Mon 12/2911:39 amBZN - ORD
Nonstop3h 10mAmerican Airlines
Thu 1/17:36 amORD - BZN
1 stop8h 18mAmerican Airlines
Deal found 12/27$499
This Southwest deal was found by Cheapflights users on 12/26. 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.
Mon 12/2910:15 amBZN - MDW
2 stops10h 10mSouthwest
Fri 1/23:35 pmMDW - BZN
2 stops9h 50mSouthwest
Deal found 12/26$500
This Delta deal was found by Cheapflights users on 12/27. 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.
Mon 12/2912:36 pmBZN - MDW
1 stop8h 46mDelta
Thu 1/16:00 amMDW - BZN
1 stop9h 06mDelta
Deal found 12/27$509
This Delta deal was found by Cheapflights users on 12/27. 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.
Mon 12/2912:15 pmBZN - ORD
1 stop8h 21mDelta
Thu 1/15:30 amORD - BZN
1 stop9h 36mDelta
Deal found 12/27$509
This Southwest deal was found by Cheapflights users on 12/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:00 amBZN - MDW
2 stops8h 50mSouthwest
Thu 1/11:15 pmMDW - BZN
2 stops10h 30mSouthwest
Deal found 12/27$519
This Southwest deal was found by Cheapflights users on 12/26. 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.
Mon 12/295:00 amBZN - ORD
2 stops10h 15mSouthwest
Fri 1/23:05 pmORD - BZN
2 stops10h 20mSouthwest
Deal found 12/26$545
This Southwest deal was found by Cheapflights users on 12/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:00 amBZN - ORD
2 stops10h 15mSouthwest
Thu 1/12:15 pmORD - BZN
2 stops9h 30mSouthwest
Deal found 12/27$569

Find flight deals from Bozeman to Illinois

Keep the following information in mind while searching for Bozeman to Illinois flight deals. Data was last updated December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$220
(American Airlines)

One-way from

$95
(Southwest)

Popular in

March

Cheapest in

January

Average price

$338

Good round-trip deal

$310 or less

Good one-way deal

$151 or less
Provider with most accurate pricing for Bozeman Gallatin Field-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Chicago (CHI) flights.
Search Deals
From Bozeman Gallatin Field to Illinois
Search Deals
One-way flight from Bozeman Gallatin Field to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($53 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 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 Bozeman Gallatin Field to Illinois.
Search Deals
Price to beat on a one-way flight from Bozeman Gallatin Field to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Bozeman to Illinois 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 28, 2025.
Use the filters below to find and compare flights from Bozeman to Illinois that are best for you.

Fly from

Bozeman

Fly to

Illinois

Route

Depart

Return

Price

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 1/21

7:25 pm-1:54 pm

1 stop17h 29m

Lambert-St Louis

Mon 1/26

2:50 pm-11:56 pm

1 stop10h 06m

$210

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 1/21

6:15 am-7:27 pm

2 stops12h 12m

Lambert-St Louis

Mon 1/26

4:15 pm-9:33 pm

1 stop6h 18m

$216

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Sat 2/14

3:02 pm-11:56 pm

1 stop7h 54m

Chicago O'Hare Intl

Tue 2/17

5:29 pm-11:56 pm

1 stop7h 27m

$228

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 1/23

1:42 pm-5:49 pm

Nonstop3h 07m

Chicago O'Hare Intl

Sat 1/31

8:32 pm-10:57 pm

Nonstop3h 25m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 1/21

1:42 pm-5:49 pm

Nonstop3h 07m

Chicago O'Hare Intl

Mon 1/26

7:37 pm-10:02 pm

Nonstop3h 25m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 1/22

12:46 pm-4:55 pm

Nonstop3h 09m

Chicago O'Hare Intl

Mon 1/26

9:11 am-11:44 am

Nonstop3h 33m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 1/29

1:42 pm-5:49 pm

Nonstop3h 07m

Chicago O'Hare Intl

Sat 1/31

8:32 pm-10:57 pm

Nonstop3h 25m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Tue 2/10

7:20 am-5:10 pm

1 stop8h 50m

Chicago O'Hare Intl

Tue 2/17

5:29 pm-11:56 pm

1 stop7h 27m

$230

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 1/29

12:46 pm-4:55 pm

Nonstop3h 09m

Chicago O'Hare Intl

Sat 1/31

7:00 am-1:45 pm

1 stop7h 45m

$239

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 2/12

6:20 am-1:14 pm

1 stop5h 54m

Lambert-St Louis

Mon 2/16

6:25 am-11:46 am

1 stop6h 21m

$244

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 42 results
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Best time to book a flight from Bozeman to Illinois

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

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

Currently, October is the cheapest month in which you can book a flight from Bozeman to Illinois (average of $169). Flying from Bozeman to Illinois in May is currently the most expensive (average of $319). 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 BZN to IL?

Find hourly flight availability from Bozeman to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 28, 2025.

When flying from Bozeman to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 39% versus a flight in the morning.

Weekly flight availability from Bozeman to Illinois

Explore weekly flight availability from Bozeman to Illinois. 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 December 28, 2025.

The most flights from BZN to USIL are scheduled on a Monday (11 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (8 on average).

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated December 28, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Bozeman to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,019 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,113 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,073 reviews
Southwest
8.0
Very good
4,256 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

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

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

  • How long is the flight from Bozeman to Illinois?

    Departing from Bozeman to Illinois will take you 3h 07m. The distance between Bozeman and Illinois is about 1182 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $100. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Bozeman to Illinois for a low price.

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

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

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

    No one likes to see their flight delayed. When booking a flight from Bozeman to Illinois consider choosing Lufthansa (94%), Envoy Air (92%) or United Airlines (91%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Bozeman to Illinois?

    The cheapest flight price from Bozeman to Illinois is $124. On average you can expect to pay $340. The most popular route, (Bozeman Gallatin Field - Chicago O'Hare Intl), can usually be booked for $229.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Bozeman to Illinois (average of $169). Flying from Bozeman to Illinois in May is currently the most expensive (average of $319). 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.

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Alternative routes for Bozeman to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Kalispell to Denver flights

Top 3 airlines flying from Bozeman to Illinois

Discover the top 3 airlines that operate flights from Bozeman to Illinois. 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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$191Average$292FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$229Average$478FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$353FlexibilityNo cancel feeOn-timeN/A

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