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Bozeman

$85+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 February 4, 2026.

This United Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 4/292:40 pm
STL
-
BZN
1 stop7h 52m
United Airlines
Wed 5/612:35 pm
BZN
-
STL
1 stop7h 33m
United Airlines
Deal found 2/3$211
This United Airlines deal was found by Cheapflights users on 2/1. 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 9/15:20 pm
PIA
-
BZN
1 stop5h 58m
United Airlines
Sat 9/58:30 am
BZN
-
PIA
1 stop7h 01m
United Airlines
Deal found 2/1$239
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Sat 7/185:15 am
STL
-
BZN
1 stop5h 13m
United Airlines
Sat 7/255:32 pm
BZN
-
STL
1 stop5h 26m
United Airlines
Deal found 2/3$247
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:29 pm
ORD
-
BZN
1 stop7h 27m
Alaska Airlines
Sat 2/283:02 pm
BZN
-
ORD
1 stop7h 54m
Alaska Airlines
Deal found 2/4$248
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am
ORD
-
BZN
1 stop5h 22m
Delta
Sun 8/3011:27 am
BZN
-
ORD
1 stop7h 16m
Delta
Deal found 2/3$249
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:45 pm
MDW
-
BZN
1 stop6h 08m
Delta
Tue 8/2511:27 am
BZN
-
MDW
1 stop5h 38m
Delta
Deal found 2/3$249
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Sun 3/157:41 pm
ORD
-
BZN
Nonstop3h 31m
United Airlines
Tue 3/248:00 am
BZN
-
ORD
Nonstop3h 03m
United Airlines
Deal found 2/3$250
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 2/189:16 am
ORD
-
BZN
Nonstop3h 30m
United Airlines
Sat 2/214:29 pm
BZN
-
ORD
1 stop6h 30m
United Airlines
Deal found 2/3$251
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:20 pm
ORD
-
BZN
2 stops7h 39m
Delta
Sun 8/3011:27 am
BZN
-
ORD
1 stop7h 16m
Delta
Deal found 2/3$254
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:00 pm
MDW
-
BZN
2 stops11h 53m
Delta
Sat 8/2911:27 am
BZN
-
MDW
1 stop5h 38m
Delta
Deal found 2/3$254
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/225:25 am
ORD
-
BZN
1 stop6h 59m
Delta
Tue 3/33:05 pm
BZN
-
ORD
1 stop7h 47m
Delta
Deal found 2/2$255
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/56:40 pm
STL
-
BZN
1 stop5h 35m
Delta
Mon 3/96:30 pm
BZN
-
STL
1 stop4h 51m
Delta
Deal found 2/2$257

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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$211
(United Airlines)

One-way from

$85
(United Airlines)

Popular in

March

Cheapest in

September

Average price

$393

Good round-trip deal

$271 or less

Good one-way deal

$176 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.
Search Deals
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. 12% potential increase in price ($48 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 February 2026
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 February 4, 2026.
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 4/29

2:40 pm-9:32 pm

1 stop7h 52m

Bozeman Gallatin Field

Wed 5/6

12:35 pm-9:08 pm

1 stop7h 33m

$211

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 3/18

5:15 am-9:42 am

1 stop5h 27m

Bozeman Gallatin Field

Wed 3/25

2:43 pm-8:41 pm

1 stop4h 58m

$211

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Tue 5/5

7:15 am-2:35 pm

1 stop8h 20m

Bozeman Gallatin Field

Tue 5/12

1:12 pm-9:50 pm

1 stop7h 38m

$249

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Sat 5/2

2:12 pm-8:11 pm

1 stop6h 59m

Bozeman Gallatin Field

Tue 5/5

5:59 am-1:32 pm

1 stop6h 33m

$249

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 6/11

5:00 am-9:28 am

1 stop5h 28m

Bozeman Gallatin Field

Sat 6/20

5:32 pm-12:44 am

1 stop6h 12m

$249

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Tue 5/5

2:12 pm-8:11 pm

1 stop6h 59m

Bozeman Gallatin Field

Sat 5/9

6:00 am-1:19 pm

1 stop6h 19m

$249

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sat 3/28

7:09 pm-9:38 pm

Nonstop3h 29m

Bozeman Gallatin Field

Thu 4/2

1:49 pm-5:58 pm

Nonstop3h 09m

$254

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Mon 2/23

2:05 pm-11:15 pm

2 stops10h 10m

Bozeman Gallatin Field

Tue 3/3

5:30 am-12:19 pm

1 stop5h 49m

$254

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Tue 5/5

2:12 pm-8:11 pm

1 stop6h 59m

Bozeman Gallatin Field

Tue 5/12

6:00 am-6:14 pm

2 stops11h 14m

$254

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Fri 3/6

6:10 am-12:53 pm

1 stop7h 43m

Bozeman Gallatin Field

Wed 3/11

5:20 am-1:31 pm

1 stop7h 11m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

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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 $289). 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 February 4, 2026.

It’s typically best to fly out from Illinois to Bozeman in the evening. Doing so could potentially save you 24% on the flight price compared to flying at noon, 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 January 31, 2026.

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. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Bozeman

Explore weekly flight availability from Illinois to Bozeman. 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 February 4, 2026.

The most flights from USIL to BZN are scheduled on a Monday (6 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

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 $254, United Airlines can have you in Bozeman from Illinois in 3h 29m. Illinois and Bozeman are separated by a distance of 1182 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 Qatar Airways (79%), American Airlines (73%) and United Airlines (64%).

  • What are the cheapest flights from Illinois to Bozeman?

    The cheapest flight price from Illinois to Bozeman is $136. On average you can expect to pay $288. The most popular route, (Chicago O'Hare Intl - Bozeman Gallatin Field), can usually be booked for $169.

  • 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 $289). 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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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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$152Average$405FlexibilityNo cancel feeOn-time63%
DeltaCheapest$169Average$278FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$210Average$388FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$232Average$462FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$291Average$486FlexibilityNo cancel feeOn-time75%

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