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O'Hare Intl

$96+ Cheap flights from Montana to O'Hare Intl (ORD)

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 Montana to O'Hare Intl

Cheapest flights from Montana to O'Hare Intl
Explore the most affordable flight options available from Montana to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

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.
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 Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/246:23 am
MSO
-
ORD
1 stop9h 10m
Alaska Airlines
Wed 3/45:29 pm
ORD
-
MSO
1 stop7h 30m
Alaska Airlines
Deal found 1/20$237
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
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:30 am
BZN
-
ORD
1 stop5h 49m
Delta
Tue 2/172:20 pm
ORD
-
BZN
1 stop9h 05m
Delta
Deal found 1/21$249
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.
Thu 5/281:23 pm
FCA
-
ORD
Nonstop3h 35m
American Airlines
Mon 6/19:45 am
ORD
-
FCA
Nonstop3h 45m
American Airlines
Deal found 1/20$249
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/195:10 am
BIL
-
ORD
1 stop6h 09m
Delta
Mon 2/233:59 pm
ORD
-
BIL
1 stop4h 40m
Delta
Deal found 1/19$249
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.
Thu 6/1812:51 pm
BZN
-
ORD
Nonstop3h 21m
American Airlines
Sun 6/211:49 pm
ORD
-
BZN
Nonstop3h 20m
American Airlines
Deal found 1/21$250

Find flight deals from Montana to O'Hare Intl

Keep the following information in mind while searching for Montana to O'Hare Intl flight deals. Data was last updated January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$217
(Delta)

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.
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From Montana to Chicago O'Hare Intl
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One-way flight from Montana to Chicago O'Hare Intl
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
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Price to beat on a round-trip flight from Montana to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Montana to Chicago O'Hare Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Montana to O'Hare Intl 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 Montana to Chicago O'Hare Intl Airport that are best for you.

Fly from

Montana

Fly to

O'Hare Intl

Route

Depart

Return

Price

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

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 2/13

4:29 pm-11:59 pm

1 stop6h 30m

Chicago O'Hare Intl

Mon 2/16

4:20 pm-6:59 pm

Nonstop3h 39m

$239

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 3/5

4:30 pm-10:55 pm

1 stop5h 25m

Chicago O'Hare Intl

Sun 3/8

7:41 pm-10:12 pm

Nonstop3h 31m

$239

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 2/18

2:41 pm-10:53 pm

1 stop7h 12m

Chicago O'Hare Intl

Sat 2/21

4:20 pm-6:59 pm

Nonstop3h 39m

$239

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 2/11

3:00 pm-11:53 pm

1 stop7h 53m

Chicago O'Hare Intl

Wed 2/18

2:20 pm-10:25 pm

1 stop9h 05m

$249

KalispellChicago

FCA - ORD

FCAORD

Kalispell Glacier Park

Thu 5/28

1:23 pm-5:58 pm

Nonstop3h 35m

Chicago O'Hare Intl

Mon 6/1

9:45 am-12:30 pm

Nonstop3h 45m

$249

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 2/12

2:39 pm-11:56 pm

1 stop8h 17m

Chicago O'Hare Intl

Tue 2/17

2:20 pm-10:25 pm

1 stop9h 05m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 60 results
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Best time to book a flight from Montana to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl 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.

Cheapflights Insights

Everything you need to know about your flight from Montana to Chicago O'Hare Intl Airport

What is the cheapest month to book a flight from Montana to Chicago O'Hare Intl Airport?

Currently, October is the cheapest month in which you can book a flight from Montana to Chicago O'Hare Intl Airport (average of $169). Flying from Montana to Chicago O'Hare Intl Airport in November is currently the most expensive (average of $298). 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 ORD?

Find hourly flight availability from Montana to O'Hare Intl. 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 Montana to Chicago O'Hare Intl Airport, 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 O'Hare Intl Airport

Explore weekly flight availability from Montana to O'Hare Intl. 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 USMT to ORD 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).

Related info for your journey

Find useful and relevant information for your journey from Montana to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Montana to Chicago O'Hare Intl Airport?

    A quick flight from Montana to Chicago O'Hare Intl Airport can take about 3h 11m. United Airlines provides one of the quickest options available for as low as $229. Montana and Chicago O'Hare Intl Airport are separated by a distance of 1182 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Montana to Chicago O'Hare Intl Airport one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $105. Users have also found prices from $116 and $124 on Alaska Airlines and United Airlines, respectively.

  • What are the most popular routes from Montana to Chicago O'Hare Intl Airport?

    The most popular route from Montana to Chicago O'Hare Intl Airport is Bozeman Gallatin Field - Chicago O'Hare Intl. You may also consider Missoula Johnson-Bell Field - Chicago O'Hare Intl or Billings Logan Intl - Chicago O'Hare Intl.

  • What are the most reliable airlines from Montana to Chicago O'Hare Intl Airport?

    The top 3 most reliable airlines when flying from Montana to Chicago O'Hare Intl Airport are United Airlines (79%), Lufthansa (78%) and Qatar Airways (76%).

  • What are the cheapest flights from Montana to Chicago O'Hare Intl Airport?

    The cheapest flight price from Montana to Chicago O'Hare Intl Airport 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 Montana to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Montana to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montana to O'Hare Intl?

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

  • Can I find deals for business class flights from Montana to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Montana to O'Hare Intl 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 O'Hare Intl Airport?

    Currently, October is the cheapest month in which you can book a flight from Montana to Chicago O'Hare Intl Airport (average of $169). Flying from Montana to Chicago O'Hare Intl Airport in November is currently the most expensive (average of $298). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Naperville
Gurnee
Elgin
Hoffman Estates
Beloit
Delavan
Oak Brook
Downers Grove
Des Plaines
Elk Grove Village
Skokie
Libertyville
Lake Geneva
Bridgeview
Kenosha
Warrenville
Waukegan
Aurora

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Montana to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Los Angeles to Midway flights
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Santa Ana to O'Hare Intl flights
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Orlando to O'Hare Intl flights
George Bush Intcntl to O'Hare Intl flights
LaGuardia to Midway flights
San Diego to O'Hare Intl flights
Fort Lauderdale to O'Hare Intl flights
Hartford to O'Hare Intl flights
Hobby to Midway flights
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Philadelphia to Midway flights
Miami to O'Hare Intl flights
Denver to Midway flights
Cleveland to O'Hare Intl flights
Detroit to O'Hare Intl flights
Minneapolis to Midway flights
Reagan-National to Midway flights
Sacramento to O'Hare Intl flights
San Jose to O'Hare Intl flights
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San Antonio to O'Hare Intl flights

Top 4 airlines flying from Montana to O'Hare Intl

Discover the top 4 airlines that operate flights from Montana to O'Hare Intl. 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$356FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$191Average$336FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$229Average$451FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$349Average$455FlexibilityNo cancel feeOn-time75%

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