HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Big Sky

$134+ Cheap flights from Chicago (CHI) to Big Sky, MT

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BZN
Jan 4 — Jan 111
Sat 1/4
Sat 1/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Chicago to Big Sky with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Chicago to Big Sky are usually found in January or February, booked 57 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Chicago to Big Sky

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Big Sky (BS1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 30, 2024.

Round-trip from

$291
(Delta)

One-way from

$134
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$517
From Chicago (CHI) to Big Sky
Search Deals
One-way flight from Chicago (CHI) to Big Sky
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Best time to find cheap flights, 1% potential price drop
Search Deals
Average for round-trip flights in December 2024
Search Deals

Find flight deals from Chicago to Big Sky

Cheapest flights from Chicago to Big Sky
Explore the most affordable flight options available from Chicago to Big Sky. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 30, 2024.

This Delta deal was found by Cheapflights users on 12/30. 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 12/315:50 pmORD - BZN
1 stop6h 46mDelta
Tue 1/73:21 pmBZN - ORD
1 stop7h 38mDelta
Deal found 12/30$473
This Delta deal was found by Cheapflights users on 12/30. 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 12/314:50 pmMDW - BZN
1 stop7h 46mDelta
Tue 1/76:10 amBZN - MDW
1 stop5h 36mDelta
Deal found 12/30$473
This Southwest deal was found by Cheapflights users on 12/29. 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 12/307:30 amORD - BZN
2 stops11h 25mSouthwest
Tue 12/3111:45 amBZN - ORD
1 stop9h 50mSouthwest
Deal found 12/29$533
This Southwest deal was found by Cheapflights users on 12/30. 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.
Tue 12/311:00 pmMDW - BZN
2 stops9h 10mSouthwest
Tue 1/75:05 amBZN - MDW
2 stops9h 55mSouthwest
Deal found 12/30$548
This United Airlines deal was found by Cheapflights users on 12/30. 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 12/318:20 pmORD - BZN
Nonstop3h 29mUnited Airlines
Tue 1/77:25 amBZN - ORD
Nonstop3h 12mUnited Airlines
Deal found 12/30$728
This American Airlines deal was found by Cheapflights users on 12/29. 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 12/318:20 amORD - BZN
Nonstop3h 38mAmerican Airlines
Fri 1/311:28 amBZN - ORD
Nonstop3h 07mAmerican Airlines
Deal found 12/29$754
This Alaska Airlines deal was found by Cheapflights users on 12/29. 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.
Mon 12/306:56 pmORD - BZN
2 stops17h 55mAlaska Airlines
Sun 1/55:55 pmBZN - ORD
1 stop19h 45mAlaska Airlines
Deal found 12/29$1,134

Find flights from Chicago to Big Sky within your budget

Customize your flight search to find flights from Chicago to Big Sky 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 30, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Tue 3/11

5:00 pm-11:32 pm

2 stops7h 32m

Bozeman Gallatin Field

Tue 3/25

5:45 am-12:49 pm

1 stop6h 04m

$291

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Tue 3/11

2:55 pm-11:32 pm

2 stops9h 37m

Bozeman Gallatin Field

Tue 3/25

6:00 am-2:15 pm

1 stop7h 15m

$291

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 3/13

7:45 am-1:58 pm

1 stop7h 13m

Bozeman Gallatin Field

Fri 3/21

8:00 am-4:53 pm

1 stop7h 53m

$297

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Fri 1/31

9:45 am-12:12 pm

Nonstop3h 27m

Bozeman Gallatin Field

Mon 2/3

3:54 pm-11:59 pm

1 stop7h 05m

$299

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Sat 1/25

12:05 pm-9:10 pm

1 stop10h 05m

Bozeman Gallatin Field

Fri 1/31

5:05 am-12:00 pm

1 stop5h 55m

$348

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 1/9

9:15 am-11:49 am

Nonstop3h 34m

Bozeman Gallatin Field

Mon 1/13

12:45 pm-4:51 pm

Nonstop3h 06m

$359

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 2/13

11:30 am-6:03 pm

3 stops31h 33m

Bozeman Gallatin Field

Thu 2/20

6:09 pm-6:07 am

1 stop10h 58m

$404

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sat 1/11

10:45 am-9:10 pm

2 stops11h 25m

Bozeman Gallatin Field

Sun 1/12

5:50 am-3:35 pm

2 stops8h 45m

$428

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sun 2/2

7:45 am-1:57 pm

1 stop7h 12m

$134

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Tue 2/25

7:05 am-2:11 pm

1 stop8h 06m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

Showing 1-10 of 15 results
1
2

Best time to book a flight from Chicago to Big Sky

Have a flexible travel schedule? Discover the best time to fly to Big Sky from Chicago 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.

Travel insights for flights from Chicago to Big Sky

Get recent, data-driven insights about flights from Chicago to Big Sky including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Chicago to Big Sky?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Big Sky. Price data was last updated on December 27, 2024.

Booking 57 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Big Sky. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Chicago to Big Sky?

Currently, October is the cheapest month in which you can book a flight from Chicago to Big Sky (average of $371). Flying from Chicago to Big Sky in June is currently the most expensive (average of $520). 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 CHI to BS1?

Find hourly flight availability from Chicago to Big Sky. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 30, 2024.

When flying from Chicago to Big Sky, 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 Chicago to Big Sky

Explore weekly flight availability from Chicago to Big Sky. 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 30, 2024.

The most flights from CHI to BS1 are scheduled on a Monday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Big Sky by month

Plan your trip to Big Sky by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Big Sky ranges from 0.4 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Big Sky when rainfall is around 0.4 in.

Temperature in Big Sky by month

Plan your trip to Big Sky by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Big Sky, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

Reviews of airlines servicing Big Sky

Get insights into the airlines that provide service to Big Sky. 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 Big Sky. Reviews last updated December 30, 2024.
To help decide which airline to fly from Chicago to Big Sky, see what other customers have to say about Alaska Airlines, American Airlines and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,715 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,715 reviews
Southwest
8.1
Very good
4,715 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,594 reviews
Southwest
8.1
Very good
4,715 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,540 reviews
Southwest
8.1
Very good
4,715 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,715 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,715 reviews

Crew

8.7

Entertainment

7.7

Overall

8.1

Comfort

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Big Sky. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Chicago to Big Sky one-way?

    $134 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $143 and $158, respectively.

  • What are the most reliable airlines from Chicago to Big Sky?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago to Big Sky on time: Lufthansa (90%), American Airlines (90%), Alaska Airlines (90%).

  • What are the cheapest flights from Chicago to Big Sky?

    On average you can expect to pay $502 for a flight from Chicago to Big Sky. The cheapest flight overall is $233 while the most popular route, (Chicago O'Hare Intl - Bozeman Gallatin Field) is currently priced at $261.

  • Can I find deals for flights from Chicago to Big Sky that include hotel bookings?

    Yes. In addition to deals on Chicago to Big Sky flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Big Sky?

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

  • Can I find deals for business class flights from Chicago to Big Sky?

    Yes. Cheapflights offers flight deals from Chicago to Big Sky 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 Chicago to Big Sky?

    Currently, October is the cheapest month in which you can book a flight from Chicago to Big Sky (average of $371). Flying from Chicago to Big Sky in June is currently the most expensive (average of $520). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Chicago to Big Sky

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Bozeman flights
O'Hare Intl to Kalispell flights
Midway to Bozeman flights
O'Hare Intl to Missoula flights
Midway to Kalispell flights
St. Louis to Bozeman flights
O'Hare Intl to Billings flights
St. Louis to Kalispell flights
O'Hare Intl to Great Falls flights
Midway to Billings flights
Midway to Missoula flights
O'Hare Intl to Helena flights
St. Louis to Missoula flights
Moline to Kalispell flights
St. Louis to Billings flights
Midway to Great Falls flights
St. Louis to Cody flights
Peoria to Bozeman flights
O'Hare Intl to Cody flights
Peoria to Missoula flights
Midway to Helena flights
O'Hare Intl to Butte flights
St. Louis to Great Falls flights
O'Hare Intl to West Yellowstone flights
Moline to Bozeman flights
Midway to Cody flights
Peoria to Billings flights
Moline to Missoula flights
Peoria to Kalispell flights
St. Louis to Butte flights
Bloomington to Missoula flights
Bloomington to Kalispell flights
Moline to Billings flights
St. Louis to West Yellowstone flights
Dubuque to Kalispell flights
Bloomington to Great Falls flights
Bloomington to Bozeman flights
Springfield to Missoula flights
Springfield to Bozeman flights
Peoria to Helena flights
Bloomington to Helena flights
Champaign to Billings flights
Champaign to Bozeman flights
Moline to Cody flights
Midway to West Yellowstone flights

Top 5 airlines flying from Chicago to Big Sky

Discover the top 5 airlines that operate flights from Chicago to Big Sky. 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 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$175Average$245FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$301Average$435FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$313Average$459FlexibilityNo cancel feeOn-time75%
DeltaCheapest$318Average$517FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$341Average$629FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.