HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$123+ Cheap flights from Montana to Chicago (CHI)

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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — CHI
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Montana to Chicago 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.

Cheap flight deals from Montana to Chicago

Keep the following information in mind while searching for Montana to Chicago flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(Delta)

One-way from

$123
(Mytrip)

Popular in

November

Cheapest in

January

Average price

$409

Good round-trip deal

$460 or less

Good one-way deal

$216 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 Montana to Chicago (CHI)
Search Deals
One-way flight from Montana to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
Price to beat on a round-trip flight from Montana to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Montana to Chicago (CHI).
Search Deals

Find flight deals from Montana to Chicago

Cheapest flights from Montana to Chicago
Explore the most affordable flight options available from Montana to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Delta deal was found by Cheapflights users on 2/18. 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 3/186:29 amBIL - MDW
1 stop6h 46mDelta
Tue 3/257:09 pmMDW - BIL
1 stop5h 01mDelta
Deal found 2/18$249
This Delta deal was found by Cheapflights users on 2/18. 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 3/1811:35 amBIL - ORD
1 stop5h 11mDelta
Tue 3/257:15 pmORD - BIL
1 stop6h 01mDelta
Deal found 2/18$249
This Trip.com deal was found by Cheapflights users on 2/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/152:55 pmBZN - ORD
1 stop8h 04mAlaska Airlines
Sat 11/17:45 amORD - BZN
1 stop7h 20mAlaska Airlines
Deal found 2/20$251
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 3/206:00 amBZN - MDW
1 stop7h 15mDelta
Thu 3/277:09 pmMDW - BZN
1 stop5h 23mDelta
Deal found 2/20$269
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/196:42 amMSO - ORD
1 stop9h 11mHawaiian Airlines
Wed 3/265:53 pmORD - MSO
1 stop7h 04mHawaiian Airlines
Deal found 2/19$269
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/21:20 pmBZN - ORD
1 stop7h 25mDelta
Mon 4/146:55 pmORD - BZN
1 stop6h 00mDelta
Deal found 2/19$269
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/106:38 pmMSO - ORD
1 stop10h 15mAlaska Airlines
Thu 3/134:05 pmORD - MSO
1 stop23h 54mAlaska Airlines
Deal found 2/20$289
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Fri 5/212:40 pmBZN - ORD
Nonstop3h 07mUnited Airlines
Sun 5/49:20 pmORD - BZN
Nonstop3h 25mUnited Airlines
Deal found 2/19$290
This American Airlines deal was found by Cheapflights users on 2/20. 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 3/211:57 pmBZN - ORD
Nonstop2h 57mAmerican Airlines
Tue 3/255:00 amORD - BZN
1 stop8h 07mAmerican Airlines
Deal found 2/20$299
This United Airlines deal was found by Cheapflights users on 2/19. 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 8/712:46 pmMSO - ORD
Nonstop3h 24mUnited Airlines
Sun 8/105:00 amORD - MSO
1 stop5h 58mUnited Airlines
Deal found 2/19$302
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/69:53 pmFCA - ORD
1 stop14h 46mMultiple Airlines
Sun 4/138:00 amORD - FCA
1 stop13h 58mMultiple Airlines
Deal found 2/20$303
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/21:15 pmHLN - ORD
1 stop7h 30mDelta
Tue 4/87:45 amORD - HLN
1 stop5h 50mDelta
Deal found 2/19$305

Find flights from Montana to Chicago within your budget

Customize your flight search to find flights from Montana to Chicago 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 20, 2025.

Fly from

Montana

Fly to

Chicago

Route

Depart

Return

Price

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Tue 3/18

6:29 am-2:15 pm

1 stop6h 46m

Chicago Midway

Tue 3/25

7:09 pm-11:10 pm

1 stop5h 01m

$249

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Tue 3/18

11:35 am-5:46 pm

1 stop5h 11m

Chicago O'Hare Intl

Tue 3/25

7:15 pm-12:16 am

1 stop6h 01m

$249

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Wed 3/19

6:42 am-4:53 pm

1 stop9h 11m

Chicago O'Hare Intl

Wed 3/26

5:53 pm-11:57 pm

1 stop7h 04m

$269

BozemanChicago

BZN - MDW

BZNMDW

Bozeman Gallatin Field

Thu 3/20

6:00 am-2:15 pm

1 stop7h 15m

Chicago Midway

Thu 3/27

7:09 pm-11:32 pm

1 stop5h 23m

$269

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 4/2

1:20 pm-9:45 pm

1 stop7h 25m

Chicago O'Hare Intl

Mon 4/14

6:55 pm-11:55 pm

1 stop6h 00m

$269

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Mon 3/10

6:38 pm-5:53 am

1 stop10h 15m

Chicago O'Hare Intl

Thu 3/13

4:05 pm-2:59 pm

1 stop23h 54m

$289

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 4/11

12:40 pm-4:47 pm

Nonstop3h 07m

Chicago O'Hare Intl

Tue 4/15

9:09 am-11:37 am

Nonstop3h 28m

$290

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 3/6

1:58 pm-5:55 pm

Nonstop2h 57m

Chicago O'Hare Intl

Tue 5/6

5:00 am-12:56 pm

1 stop8h 56m

$299

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Thu 8/7

12:46 pm-5:10 pm

Nonstop3h 24m

Chicago O'Hare Intl

Sun 8/10

5:00 am-9:58 am

1 stop5h 58m

$302

KalispellChicago

FCA - ORD

FCAORD

Kalispell Glacier Park

Sun 4/6

9:53 pm-1:39 pm

1 stop14h 46m

Chicago O'Hare Intl

Sun 4/13

8:00 am-8:58 pm

1 stop13h 58m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 59 results
1
2
3
...
6

Best time to book a flight from Montana to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Montana 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 Montana to Chicago

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

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

Currently, August is the cheapest month in which you can book a flight from Montana to Chicago (average of $245). Flying from Montana to Chicago in March is currently the most expensive (average of $321). 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 MT to CHI?

Find hourly flight availability from Montana to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

When flying from Montana to Chicago, 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 Montana to Chicago

Explore weekly flight availability from Montana to Chicago. 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 20, 2025.

The most flights from USMT to CHI are scheduled on a Monday (7 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Chicago by month

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

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

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

If weather is an important factor for your trip to Chicago, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated February 20, 2025.
To help decide which airline to fly from Montana to Chicago, see what other customers have to say about Southwest, Alaska Airlines and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Related info for your journey

Find useful and relevant information for your journey from Montana to Chicago. 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 Montana to Chicago one-way?

    The cheapest airlines for a one-way flight from Montana to Chicago are Delta ($135), Alaska Airlines ($135), and American Airlines ($145).

  • What are the most popular routes from Montana to Chicago?

    When deciding which route to take from Montana to Chicago consider Missoula Johnson-Bell Field - Chicago O'Hare Intl, Kalispell Glacier Park - Chicago O'Hare Intl or Bozeman Gallatin Field - Chicago O'Hare Intl as they are the most popular.

  • What are the most reliable airlines from Montana to Chicago?

    No one likes to see their flight delayed. When booking a flight from Montana to Chicago consider choosing Lufthansa (82%), United Airlines (82%) or Emirates (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Montana to Chicago?

    On average you can expect to pay $612 for a flight from Montana to Chicago. The cheapest flight overall is $148 while the most popular route, (Missoula Johnson-Bell Field - Chicago O'Hare Intl) is currently priced at $269.

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

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

  • How can I find direct flights from Montana to Chicago?

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

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

    Yes. Cheapflights offers flight deals from Montana to Chicago 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 Montana to Chicago?

    Currently, August is the cheapest month in which you can book a flight from Montana to Chicago (average of $245). Flying from Montana to Chicago in March is currently the most expensive (average of $321). 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

Traveling to a place near Montana?

Book flights to Montana if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Porter
Lansing
Valparaiso
Chesterton

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 Montana to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to O'Hare Intl flights
Dallas/Fort Worth to O'Hare Intl flights
Los Angeles to O'Hare Intl flights
Newark to O'Hare Intl flights
LaGuardia to O'Hare Intl flights
Dulles Intl to O'Hare Intl flights
Boston to O'Hare Intl flights
Seattle to O'Hare Intl flights
Baltimore to O'Hare Intl flights
San Francisco to O'Hare Intl flights
Reagan-National to O'Hare Intl flights
Newark to Midway flights
John F Kennedy Intl to Midway flights
Philadelphia to O'Hare Intl flights
Denver to O'Hare Intl flights
Sky Harbor Intl to O'Hare Intl flights
Minneapolis to O'Hare Intl flights
Dallas/Fort Worth to Midway flights
LaGuardia to Midway flights
Los Angeles to Midway flights
Baltimore to Midway flights
Austin to O'Hare Intl flights
Fort Lauderdale to O'Hare Intl flights
Ontario to O'Hare Intl flights
Santa Ana to O'Hare Intl flights
Atlanta to O'Hare Intl flights
Reagan-National to Midway flights
Raleigh to O'Hare Intl flights
Burbank to O'Hare Intl flights
San Diego to O'Hare Intl flights
Dulles Intl to Midway flights
Charlotte to O'Hare Intl flights
San Francisco to Midway flights
Orlando to O'Hare Intl flights
Love Field to O'Hare Intl flights
Miami to O'Hare Intl flights
Seattle to Midway flights
Atlanta to Midway flights
Newark to St. Louis flights
Portland to O'Hare Intl flights
George Bush Intcntl to O'Hare Intl flights
Minneapolis to Midway flights
LaGuardia to St. Louis flights
Philadelphia to Midway flights
Tampa to O'Hare Intl flights
Cleveland to O'Hare Intl flights
Hobby to O'Hare Intl flights
Oakland to O'Hare Intl flights
Dulles Intl to St. Louis flights
Denver to Midway flights

Top 5 airlines flying from Montana to Chicago

Discover the top 5 airlines that operate flights from Montana to Chicago. 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 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$205Average$457FlexibilityNo cancel feeOn-time75%
DeltaCheapest$226Average$445FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$229Average$466FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$238Average$547FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$388Average$390FlexibilityNo cancel feeOn-time63%
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.