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$133+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ORD
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
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 May 6, 2026.

This Expedia deal was found by Cheapflights users on 5/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/31:57 pm
BZN
-
ORD
1 stop8h 02m
Alaska Airlines
Wed 6/106:00 am
ORD
-
BZN
1 stop9h 09m
Alaska Airlines
Deal found 5/3$265
This Southwest deal was found by Cheapflights users on 5/3. 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 6/276:05 pm
BZN
-
STL
1 stop4h 40m
Southwest
Thu 7/27:45 pm
STL
-
BZN
1 stop6h 25m
Southwest
Deal found 5/3$266
This Delta deal was found by Cheapflights users on 5/4. 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.
Tue 6/21:00 pm
BZN
-
STL
1 stop5h 03m
Delta
Mon 6/87:55 pm
STL
-
BZN
1 stop5h 28m
Delta
Deal found 5/4$271
This American Airlines deal was found by Cheapflights users on 5/4. 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 6/45:00 pm
BZN
-
ORD
Nonstop3h 20m
American Airlines
Sun 6/71:30 pm
ORD
-
BZN
Nonstop3h 20m
American Airlines
Deal found 5/4$284
This Delta deal was found by Cheapflights users on 5/4. 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 6/11:00 pm
BZN
-
STL
1 stop5h 03m
Delta
Fri 6/57:59 pm
STL
-
BZN
1 stop5h 00m
Delta
Deal found 5/4$285
This United Airlines deal was found by Cheapflights users on 5/3. 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 6/114:25 pm
BZN
-
ORD
Nonstop3h 15m
United Airlines
Sat 6/138:19 pm
ORD
-
BZN
Nonstop3h 28m
United Airlines
Deal found 5/3$285
This Alaska Airlines deal was found by Cheapflights users on 5/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:40 pm
BZN
-
ORD
1 stop7h 01m
Alaska Airlines
Wed 9/236:00 am
ORD
-
BZN
1 stop9h 46m
Alaska Airlines
Deal found 5/3$291
This Southwest deal was found by Cheapflights users on 5/5. 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 8/612:20 pm
BZN
-
MDW
Nonstop2h 55m
Southwest
Sun 8/95:25 am
MDW
-
BZN
1 stop7h 00m
Southwest
Deal found 5/5$295
This United Airlines deal was found by Cheapflights users on 5/5. 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 6/114:25 pm
BZN
-
ORD
Nonstop3h 15m
United Airlines
Mon 6/155:00 am
ORD
-
BZN
1 stop5h 37m
United Airlines
Deal found 5/5$295
This United Airlines deal was found by Cheapflights users on 5/2. 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 7/95:51 pm
BZN
-
STL
1 stop5h 06m
United Airlines
Mon 7/135:33 pm
STL
-
BZN
1 stop6h 10m
United Airlines
Deal found 5/2$299
This Southwest deal was found by Cheapflights users on 5/4. 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 8/67:20 am
BZN
-
MDW
2 stops8h 40m
Southwest
Mon 8/1010:50 am
MDW
-
BZN
Nonstop3h 05m
Southwest
Deal found 5/4$300
This United Airlines deal was found by Cheapflights users on 5/2. 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 6/14:29 pm
BZN
-
STL
1 stop6h 28m
United Airlines
Sun 6/75:29 pm
STL
-
BZN
1 stop6h 14m
United Airlines
Deal found 5/2$305

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 May 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$265
(Expedia)

One-way from

$133
(Alaska Airlines)

Popular in

May

Cheapest in

September

Average price

$403

Good round-trip deal

$410 or less

Good one-way deal

$188 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 ($82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 6, 2026.
Use the filters below to find and compare flights from Bozeman to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 6/4

4:29 pm-11:57 pm

1 stop6h 28m

Lambert-St Louis

Sun 6/7

5:29 pm-10:43 pm

1 stop6h 14m

$271

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 7/9

5:51 pm-11:57 pm

1 stop5h 06m

Lambert-St Louis

Tue 7/14

5:10 am-9:37 am

1 stop5h 27m

$271

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 6/4

6:35 pm-12:30 am

1 stop4h 55m

Lambert-St Louis

Fri 6/5

7:59 pm-11:59 pm

1 stop5h 00m

$285

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Sat 8/15

4:22 pm-10:41 pm

1 stop5h 19m

Chicago O'Hare Intl

Mon 8/17

4:00 pm-6:23 pm

Nonstop3h 23m

$295

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 7/2

8:00 am-11:59 am

Nonstop2h 59m

Chicago O'Hare Intl

Sun 7/5

5:00 am-9:29 am

1 stop5h 29m

$295

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 10/1

4:29 pm-11:45 pm

1 stop6h 16m

Lambert-St Louis

Sun 10/4

5:10 am-9:39 am

1 stop5h 29m

$299

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Mon 7/13

12:13 pm-6:57 pm

1 stop5h 44m

Chicago O'Hare Intl

Fri 7/17

7:40 pm-12:23 am

1 stop5h 43m

$305

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Tue 7/7

12:13 pm-6:57 pm

1 stop5h 44m

Chicago O'Hare Intl

Wed 7/15

7:40 pm-12:23 am

1 stop5h 43m

$305

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Sat 6/6

4:20 pm-12:44 am

1 stop7h 24m

Chicago O'Hare Intl

Mon 6/15

5:00 am-9:37 am

1 stop5h 37m

$305

BozemanChicago

BZN - MDW

BZNMDW

Bozeman Gallatin Field

Thu 7/9

1:50 pm-12:35 am

2 stops9h 45m

Chicago Midway

Tue 7/21

6:00 pm-10:40 pm

1 stop5h 40m

$310

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/1

Showing 1-10 of 60 resultsSorted by cheapest first
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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

How far ahead should I book a flight from Bozeman to Illinois?

To ensure you get the cheapest price possible for a flight from Bozeman to Illinois, you should look to book at least 89 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, July is the cheapest month in which you can book a flight from Bozeman to Illinois (average of $118). Flying from Bozeman to Illinois in May is currently the most expensive (average of $250). 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 May 6, 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 May 6, 2026.

The most flights from BZN to USIL are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 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 May 6, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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
4,305 reviews

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,305 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,456 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,684 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,666 reviews
Southwest
7.9
Good
4,305 reviews

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 4h 55m. 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 Southwest, with whom users have recently found tickets for as low as $95. However, be on the lookout for offers from American Airlines and Delta, 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 SkyWest Airlines (100%), United Airlines (88%) or Lufthansa (74%) 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 $148. On average you can expect to pay $1,235. The most popular route, (Bozeman Gallatin Field - Chicago O'Hare Intl), can usually be booked for $285.

  • 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, July is the cheapest month in which you can book a flight from Bozeman to Illinois (average of $118). Flying from Bozeman to Illinois in May is currently the most expensive (average of $250). 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

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Top 2 airlines flying from Bozeman to Illinois

Discover the top 2 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 May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$191Average$261FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$229Average$396FlexibilityNo cancel feeOn-time69%

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