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

This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:25 pmBZN - STL
1 stop4h 57mUnited Airlines
Thu 1/19:55 amSTL - BZN
1 stop6h 15mUnited Airlines
Deal found 12/16$279
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.
Wed 12/311:34 pmBZN - ORD
Nonstop3h 20mAmerican Airlines
Sun 1/48:25 amORD - BZN
Nonstop3h 44mAmerican Airlines
Deal found 12/16$279
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 12/244:25 pmBZN - STL
1 stop4h 57mUnited Airlines
Sat 1/38:05 amSTL - BZN
1 stop8h 05mUnited Airlines
Deal found 12/17$299
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.
Wed 12/311:36 pmBZN - ORD
1 stop7h 43mAmerican Airlines
Sat 1/37:36 amORD - BZN
1 stop8h 18mAmerican Airlines
Deal found 12/17$299
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.
Wed 12/312:29 pmBZN - STL
1 stop8h 22mAmerican Airlines
Sun 1/47:00 amSTL - BZN
1 stop6h 46mAmerican Airlines
Deal found 12/16$305
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 12/2512:42 pmBZN - ORD
Nonstop3h 09mUnited Airlines
Thu 1/17:58 pmORD - BZN
Nonstop3h 31mUnited Airlines
Deal found 12/15$329
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:14 pmBZN - ORD
Nonstop3h 11mUnited Airlines
Sun 1/47:58 pmORD - BZN
Nonstop3h 31mUnited Airlines
Deal found 12/16$359
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.
Wed 12/3112:42 pmBZN - MLI
1 stop7h 39mUnited Airlines
Sun 1/45:33 pmMLI - BZN
1 stop5h 56mUnited Airlines
Deal found 12/15$360
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 12/184:14 pmBZN - ORD
Nonstop3h 11mUnited Airlines
Wed 12/3112:45 pmORD - BZN
Nonstop3h 25mUnited Airlines
Deal found 12/17$384
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 12/301:34 pmBZN - ORD
Nonstop3h 20mAmerican Airlines
Sat 1/38:25 amORD - BZN
Nonstop3h 44mAmerican Airlines
Deal found 12/14$415
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:15 amBZN - STL
2 stops12h 07mUnited Airlines
Sun 1/45:02 pmSTL - BZN
1 stop6h 27mUnited Airlines
Deal found 12/16$438
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:30 amBZN - MDW
1 stop4h 55mSouthwest
Thu 12/251:15 pmMDW - BZN
2 stops10h 30mSouthwest
Deal found 12/15$505

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 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$209
(United Airlines)

One-way from

$95
(Southwest)

Popular in

April

Cheapest in

January

Average price

$338

Good round-trip deal

$316 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. 21% potential increase in price ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 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 18, 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

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 3/26

4:30 pm-11:52 pm

1 stop6h 22m

Chicago O'Hare Intl

Tue 3/31

7:35 pm-10:00 pm

Nonstop3h 25m

$209

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 2/20

10:50 am-4:58 pm

1 stop5h 08m

Lambert-St Louis

Sun 2/22

6:00 am-1:15 pm

1 stop8h 15m

$211

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 1/29

3:03 pm-11:50 pm

1 stop7h 47m

Chicago O'Hare Intl

Mon 2/2

8:00 am-2:09 pm

1 stop7h 09m

$228

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

10:24 am-12:50 pm

Nonstop3h 26m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 1/23

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

12:46 pm-4:55 pm

Nonstop3h 09m

Chicago O'Hare Intl

Sun 2/1

9:11 am-11:44 am

Nonstop3h 33m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 3/26

2:05 pm-7:59 pm

1 stop4h 54m

Chicago O'Hare Intl

Tue 3/31

7:20 am-2:34 pm

1 stop8h 14m

$233

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 4/30

2:37 pm-10:30 pm

1 stop6h 53m

Chicago O'Hare Intl

Sun 5/3

7:35 pm-9:58 pm

Nonstop3h 23m

$235

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 2/18

1:34 pm-5:49 pm

Nonstop3h 15m

Chicago O'Hare Intl

Sat 2/21

6:10 am-2:51 pm

1 stop9h 41m

$239

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 1/31

3:03 pm-1:54 pm

1 stop21h 51m

Lambert-St Louis

Tue 2/3

2:50 pm-11:56 pm

1 stop10h 06m

$266

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 47 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 18, 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 40% 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 18, 2025.

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

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 18, 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
7.9
Good
4,250 reviews

Entertainment

7.5

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

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
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

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
8,005 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

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
9,091 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

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
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Crew

8.6

Overall

7.9

Boarding

8.1

Food

7.0

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 6h 22m. 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 Alaska 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 - Lambert-St Louis or Bozeman Gallatin Field - Chicago Midway 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 $114. On average you can expect to pay $463. The most popular route, (Bozeman Gallatin Field - Chicago O'Hare Intl), can usually be booked for $209.

  • 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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Missoula 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 18, 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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