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$96+ 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ORD
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
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 January 21, 2026.

This American Airlines deal was found by Cheapflights users on 1/19. 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 3/63:36 pm
BZN
-
MLI
1 stop6h 17m
American Airlines
Tue 3/106:00 am
MLI
-
BZN
1 stop7h 38m
American Airlines
Deal found 1/19$211
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/126:20 am
BZN
-
STL
1 stop5h 54m
United Airlines
Tue 2/178:41 am
STL
-
BZN
1 stop7h 42m
United Airlines
Deal found 1/19$211
This Southwest deal was found by Cheapflights users on 1/21. 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 2/1210:45 am
BZN
-
STL
2 stops7h 35m
Southwest
Tue 2/175:40 am
STL
-
BZN
1 stop5h 40m
Southwest
Deal found 1/21$216
This Delta deal was found by Cheapflights users on 1/20. 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 3/275:58 am
BZN
-
MDW
1 stop6h 27m
Delta
Mon 3/302:05 pm
MDW
-
BZN
1 stop7h 09m
Delta
Deal found 1/20$217
This Delta deal was found by Cheapflights users on 1/20. 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 3/275:20 am
BZN
-
ORD
1 stop5h 54m
Delta
Mon 3/308:55 am
ORD
-
BZN
1 stop5h 11m
Delta
Deal found 1/20$217
This United Airlines deal was found by Cheapflights users on 1/21. 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 4/1512:39 pm
BZN
-
ORD
Nonstop3h 11m
United Airlines
Sun 4/199:05 am
ORD
-
BZN
Nonstop3h 24m
United Airlines
Deal found 1/21$229
This American Airlines deal was found by Cheapflights users on 1/20. 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 3/277:00 am
BZN
-
ORD
Nonstop3h 11m
American Airlines
Mon 3/307:09 pm
ORD
-
BZN
Nonstop3h 29m
American Airlines
Deal found 1/20$230
This American Airlines deal was found by Cheapflights users on 1/21. 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 10/21:39 pm
BZN
-
ORD
Nonstop3h 16m
American Airlines
Mon 10/59:45 am
ORD
-
BZN
Nonstop3h 29m
American Airlines
Deal found 1/21$231
This Delta deal was found by Cheapflights users on 1/20. 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.
Wed 3/115:58 am
BZN
-
MDW
1 stop6h 27m
Delta
Mon 3/232:05 pm
MDW
-
BZN
1 stop7h 09m
Delta
Deal found 1/20$233
This Delta deal was found by Cheapflights users on 1/20. 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 4/1011:50 am
BZN
-
ORD
1 stop5h 15m
Delta
Sun 4/123:59 pm
ORD
-
BZN
1 stop5h 15m
Delta
Deal found 1/20$233
This United Airlines deal was found by Cheapflights users on 1/21. 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 4/1512:39 pm
BZN
-
ORD
Nonstop3h 11m
United Airlines
Mon 4/202:10 pm
ORD
-
BZN
1 stop8h 22m
United Airlines
Deal found 1/21$239
This American Airlines deal was found by Cheapflights users on 1/21. 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 8/114:54 pm
BZN
-
ORD
Nonstop3h 09m
American Airlines
Sat 8/225:00 am
ORD
-
BZN
1 stop8h 59m
American Airlines
Deal found 1/21$241

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 January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$211
(American Airlines)

One-way from

$96
(American Airlines)

Popular in

April

Cheapest in

October

Average price

$287

Good round-trip deal

$310 or less

Good one-way deal

$170 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. 15% potential increase in price ($64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 21, 2026.
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

BozemanMoline

BZN - MLI

BZNMLI

Bozeman Gallatin Field

Fri 3/6

3:36 pm-10:53 pm

1 stop6h 17m

Moline Quad-City

Tue 3/10

6:00 am-12:38 pm

1 stop7h 38m

$211

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 2/13

5:20 pm-12:50 am

1 stop6h 30m

Lambert-St Louis

Tue 2/17

5:40 am-10:20 am

1 stop5h 40m

$211

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 4/17

2:40 pm-8:54 pm

1 stop5h 14m

Lambert-St Louis

Mon 4/20

2:40 pm-9:32 pm

1 stop7h 52m

$211

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 2/12

6:20 am-1:14 pm

1 stop5h 54m

Lambert-St Louis

Tue 2/17

8:41 am-3:23 pm

1 stop7h 42m

$211

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 2/12

10:45 am-7:20 pm

2 stops7h 35m

Lambert-St Louis

Tue 2/17

5:40 am-10:20 am

1 stop5h 40m

$216

BozemanChicago

BZN - MDW

BZNMDW

Bozeman Gallatin Field

Fri 3/27

5:58 am-1:25 pm

1 stop6h 27m

Chicago Midway

Mon 3/30

2:05 pm-8:14 pm

1 stop7h 09m

$217

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 4/15

12:39 pm-4:50 pm

Nonstop3h 11m

Chicago O'Hare Intl

Mon 4/20

9:05 am-11:29 am

Nonstop3h 24m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 4/15

12:39 pm-4:50 pm

Nonstop3h 11m

Chicago O'Hare Intl

Sun 4/19

9:05 am-11:29 am

Nonstop3h 24m

$229

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 4/10

11:50 am-6:05 pm

1 stop5h 15m

Chicago O'Hare Intl

Sun 4/12

3:59 pm-8:14 pm

1 stop5h 15m

$233

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 2/18

3:36 pm-11:36 pm

1 stop7h 00m

Chicago O'Hare Intl

Sat 2/21

7:09 pm-9:38 pm

Nonstop3h 29m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 55 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 January 21, 2026.

When flying from Bozeman to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 January 21, 2026.

The most flights from BZN to USIL are scheduled on a Monday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 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 January 21, 2026.
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
4,266 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
8,089 reviews
Southwest
8.0
Very good
4,266 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
9,191 reviews
Southwest
8.0
Very good
4,266 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
11,174 reviews
Southwest
8.0
Very good
4,266 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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 5h 14m. The distance between Bozeman and Illinois is about 1163 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 - 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 United Airlines (79%), Lufthansa (78%) or Qatar Airways (76%) 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 $337. 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.
Bozeman to Seattle flights
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Bozeman to Salt Lake City flights
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Kalispell to Dallas/Fort Worth flights
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Great Falls to Seattle flights
Missoula to O'Hare Intl flights
Bozeman to Boston flights
Billings to Las Vegas flights
Bozeman to Santa Ana flights
Bozeman to Miami flights
Bozeman to San Diego flights
Kalispell to Denver flights
Bozeman to LaGuardia flights
Helena to Seattle flights
Billings to San Diego flights
Bozeman to New Orleans flights
Billings to Los Angeles flights
Missoula to Dallas/Fort Worth flights
Kalispell to Los Angeles flights
Missoula to San Diego flights
Missoula to Santa Ana flights
Missoula to Minneapolis flights
Bozeman to Tampa flights
Helena to Sky Harbor Intl flights
Bozeman to John F Kennedy Intl flights
Bozeman to Fort Myers flights
Missoula to Portland flights
Missoula to San Francisco 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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$166Average$308FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$187Average$467FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$191Average$289FlexibilityNo cancel feeOn-time71%

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