What is the cheapest airline that flies from Montana to Chicago O'Hare Intl?

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Montana to Chicago O'Hare Intl

How many flights depart from Montana to Chicago O'Hare Intl Airport on average per week?

The number of flights available between Montana and Chicago O'Hare Intl Airport is 14 per week as of November 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

How many flights depart from Montana to Chicago O'Hare Intl Airport on average per day?

2 flights are operational daily from Montana to Chicago O'Hare Intl Airport as of November 2025. The most popular departure time for this route is 12:00PM, with 90% of flights per day taking off in the afternoon.

How long does it take to fly to Chicago O'Hare Intl Airport?

On average, it takes 2h 59m to fly from Montana to Chicago O'Hare Intl Airport if you fly out of Bozeman (the most popular airport in Montana) and into Chicago O'Hare Intl Airport (the most popular airport in Chicago O'Hare Intl Airport). If you’re flying out of Kalispell and into Chicago O'Hare Intl Airport, then the flight time is around 3h 19m.

What airlines fly to Chicago O'Hare Intl Airport?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Montana according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 4 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Montana to Chicago O'Hare Intl Airport?

Prices for flights from Montana to Chicago O'Hare Intl Airport are updated daily.

How many operators does momondo search for flights from Montana to Chicago O'Hare Intl Airport?

As of November 2025, there are 4 operators available to choose from for flights from Montana to Chicago O'Hare Intl Airport.

How old do you have to be to fly from Montana to Chicago O'Hare Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to Chicago O'Hare Intl Airport.

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$84 Cheap Flights from Montana to Chicago O'Hare Intl Airport in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Montana to Chicago

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 11:14 amBZN-ORD

3h 14mnonstop

10:24 am - 12:50 pmORD-BZN

3h 26mnonstop

$199American Airlines

Find Deal

Fri, Jan 30 - Tue, Feb 3

5:15 am - 12:41 pmBZN-ORD

6h 26m1 stop

6:43 pm - 11:17 pmORD-BZN

5h 34m1 stop

$219Delta

Find Deal

Fri, Jan 30 - Tue, Feb 3

7:00 am - 11:14 amBZN-ORD

3h 14mnonstop

7:37 pm - 10:02 pmORD-BZN

3h 25mnonstop

$223American Airlines

Find Deal

Mon, Jan 26 - Fri, Jan 30

8:00 am - 5:50 pmBZN-ORD

8h 50m1 stop

7:45 am - 2:25 pmORD-BZN

7h 40m1 stop

$230Alaska Airlines

Find Deal

Wed, Feb 18 - Sat, Feb 21

3:02 pm - 11:56 pmBZN-ORD

7h 54m1 stop

7:00 am - 2:08 pmORD-BZN

8h 08m1 stop

$234Alaska Airlines

Find Deal

Thu, Feb 26 - Mon, Mar 2

10:46 am - 6:05 amBZN-ORD

42h 19m2 stops

12:59 pm - 5:02 pmORD-BZN

29h 03m1 stop

$238Multiple Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 8

7:15 am - 11:34 amBZN-ORD

3h 19mnonstop

7:58 pm - 10:29 pmORD-BZN

3h 31mnonstop

$271United Airlines

Find Deal

Fri, Dec 26 - Fri, Jan 2

2:40 pm - 11:59 pmBZN-ORD

8h 19m1 stop

8:15 pm - 10:46 pmORD-BZN

3h 31mnonstop

$281United Airlines

Find Deal

Fri, Dec 26 - Sat, Jan 3

4:00 pm - 11:59 pmGTF-ORD

6h 59m1 stop

7:45 am - 3:20 pmORD-GTF

8h 35m1 stop

$301Hawaiian Airlines

Find Deal

Mon, Mar 9 - Fri, Mar 13

9:02 pm - 11:42 amMSO-ORD

13h 40m1 stop

9:06 pm - 9:31 amORD-MSO

37h 25m2 stops

$325Multiple Airlines

Find Deal

Sat, Dec 6 - Wed, Dec 10

American Airlines flights from Montana to Chicago O'Hare Intl Airport

Our best American Airlines deals on Montana to Chicago O'Hare Intl Airport flight tickets

American Airlines

Jan 30

BZN7:00 amBozeman Gallatin Field

3h 14m

ORD11:14 amChicago O'Hare Intl

Feb 3

ORD10:24 amChicago O'Hare Intl

3h 26m

BZN12:50 pmBozeman Gallatin Field

$199

Find similar

American Airlines

Jan 26

BZN7:00 amBozeman Gallatin Field

3h 14m

ORD11:14 amChicago O'Hare Intl

Jan 30

ORD7:37 pmChicago O'Hare Intl

3h 25m

BZN10:02 pmBozeman Gallatin Field

$223

Find similar

American Airlines

Feb 26

BZN1:36 pmBozeman Gallatin Field

3h 09m

ORD5:45 pmChicago O'Hare Intl

Mar 1

ORD5:50 pmChicago O'Hare Intl

3h 31m

BZN8:21 pmBozeman Gallatin Field

$235

Find similar

Delta flights from Montana to Chicago O'Hare Intl Airport

Our best Delta deals on Montana to Chicago O'Hare Intl Airport flight tickets

Delta

Jan 30

BZN5:15 amBozeman Gallatin Field

6h 26m

1 stop

ORD12:41 pmChicago O'Hare Intl

Feb 3

ORD6:43 pmChicago O'Hare Intl

5h 34m

1 stop

BZN11:17 pmBozeman Gallatin Field

$219

Find similar

Delta

Jan 30

BZN2:01 pmBozeman Gallatin Field

8h 56m

2 stops

ORD11:57 pmChicago O'Hare Intl

Feb 3

ORD8:50 amChicago O'Hare Intl

5h 06m

1 stop

BZN12:56 pmBozeman Gallatin Field

$224

Find similar

Delta

Apr 14

FCA5:25 amKalispell Glacier Park

5h 56m

1 stop

ORD12:21 pmChicago O'Hare Intl

Apr 18

ORD9:30 amChicago O'Hare Intl

5h 15m

1 stop

FCA1:45 pmKalispell Glacier Park

$229

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Montana to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 1/30

7:00 am-11:14 am

Nonstop3h 14m

Chicago O'Hare Intl

Tue 2/3

10:24 am-12:50 pm

Nonstop3h 26m

$199

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 1/30

5:15 am-12:41 pm

1 stop6h 26m

Chicago O'Hare Intl

Tue 2/3

6:43 pm-11:17 pm

1 stop5h 34m

$219

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Mon 1/26

7:00 am-11:14 am

Nonstop3h 14m

Chicago O'Hare Intl

Fri 1/30

7:37 pm-10:02 pm

Nonstop3h 25m

$223

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 2/18

8:00 am-5:50 pm

1 stop8h 50m

Chicago O'Hare Intl

Sat 2/21

7:45 am-2:25 pm

1 stop7h 40m

$230

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 2/26

3:02 pm-11:56 pm

1 stop7h 54m

Chicago O'Hare Intl

Mon 3/2

7:00 am-2:08 pm

1 stop8h 08m

$234

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 12/5

10:46 am-6:05 am

2 stops42h 19m

Chicago O'Hare Intl

Mon 12/8

12:59 pm-5:02 pm

1 stop29h 03m

$238

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 12/26

7:15 am-11:34 am

Nonstop3h 19m

Chicago O'Hare Intl

Fri 1/2

7:58 pm-10:29 pm

Nonstop3h 31m

$271

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 12/26

2:40 pm-11:59 pm

1 stop8h 19m

Chicago O'Hare Intl

Sat 1/3

8:15 pm-10:46 pm

Nonstop3h 31m

$281

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Mon 3/9

4:00 pm-11:59 pm

1 stop6h 59m

Chicago O'Hare Intl

Fri 3/13

7:45 am-3:20 pm

1 stop8h 35m

$301

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Sat 12/6

9:02 pm-11:42 am

1 stop13h 40m

Chicago O'Hare Intl

Wed 12/10

9:06 pm-9:31 am

2 stops37h 25m

$325

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Montana to Chicago O'Hare Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Montana averaging around $304.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Wednesday when prices can be found for as low as $460. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Montana because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $645.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from Montana in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $389 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around $538. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Montana to Chicago O'Hare Intl flight route?

Fly from Bozeman Gallatin Field to Chicago O'Hare Intl for the best Montana - Chicago O'Hare Intl flight prices

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Montana when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $403 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Montana for as low as $247 on momondo.

What cabin class options are available on Montana to Chicago O'Hare Intl flights?

There are 4 cabin classes available to choose from on Montana to Chicago O'Hare Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Montana to Chicago O'Hare Intl Airport flights?

You could potentially save up to 29% on your flight if you consider stops on a Montana to Chicago O'Hare Intl Airport flight.

Cheap Montana to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montana to Chicago O'Hare Intl Airport

Best Price Found	$210
Fastest flight time	2h 57m
Direct flights	Every day

The best one-way flight to Chicago O'Hare Intl Airport from Montana in the past 72 hours is $210. The best round-trip flight deal from Montana to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $301.

The fastest flight from Montana to Chicago O'Hare Intl Airport takes 2h 57m

Direct flights go from Montana to Chicago O'Hare Intl Airport every day.

Search flight deals

When did momondo last update prices for flights from Montana to Chicago O'Hare Intl Airport?
Prices for flights from Montana to Chicago O'Hare Intl Airport are updated daily.
How many operators does momondo search for flights from Montana to Chicago O'Hare Intl Airport?
As of November 2025, there are 4 operators available to choose from for flights from Montana to Chicago O'Hare Intl Airport.
How old do you have to be to fly from Montana to Chicago O'Hare Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Montana to Chicago O'Hare Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from Montana to Chicago O'Hare Intl Airport is Boeing 737-800, representing 28.33% of all bookings. The subsequent popular models are Embraer 175 at 26.95%, Boeing 737 MAX 8 at 13.17%, and Embraer 175 (Enhanced Winglets) at 11.79%.

Best airlines flying from Montana to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Montana to Chicago O'Hare Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $191	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
United Airlines	PriceFrom $229	Free Cancellation	Rating 7.4 9,012 reviews	Search United Airlines flights
Delta	PriceFrom $236	Free Cancellation	Rating 7.9 8,004 reviews	Search Delta flights
Alaska Airlines	PriceFrom $349	Free Cancellation	Rating 8.0 11,260 reviews	Search Alaska Airlines flights

Lake Geneva

South Haven

Schaumburg

Rockford

Merrillville

Gurnee

Naperville

Rosemont

Kenosha

New Buffalo

Joliet

Oak Brook

Orland Park

Racine

Hammond

Tinley Park

Janesville

Aurora

Elgin

Benton Harbor

Why use momondo?

Why should I use momondo to find a flight deal from Montana to Chicago?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Chicago from Montana.

Can I find flights from Montana to Chicago with flexible booking policies on momondo?

All flight searches from Montana to Chicago on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Montana to Chicago?

Once all potential Montana to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Montana to Chicago right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Montana to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Chicago O'Hare Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Tue 12/9

Tue 12/16

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Chicago

Popular cities in the United States

Flights to New York John F Kennedy Intl Airportfrom $58

Flights to Newark Airportfrom $44

Flights to Dallas/Fort Worth Airportfrom $54

Flights to New York LaGuardia Airportfrom $38

Flights to Washington, D.C. Dulles Intl Airportfrom $54

Flights to Orlando Airportfrom $48

Flights to Washington, D.C. Reagan-National Airportfrom $89

Flights to Chicago Midway Airport

Flights to Dallas Love Field Airport

Montana flight routes

Flights from Bozeman Gallatin Field to Las Vegas Harry Reid Intl

Flights from Great Falls to Las Vegas Harry Reid Intl

Flights from Missoula Johnson-Bell Field to Las Vegas Harry Reid Intl

Flights from Kalispell Glacier Park to Las Vegas Harry Reid Intl

Flights from Billings Logan Intl to Las Vegas Harry Reid Intl

Flights from Bozeman Gallatin Field to Boise Air Term. Gowen Fld

Cheap flights from Montana to Chicago from $84

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montana to Chicago departing on 2/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Montana to Chicago

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

American Airlines flights from Montana to Chicago O'Hare Intl Airport

Our best American Airlines deals on Montana to Chicago O'Hare Intl Airport flight tickets

Delta flights from Montana to Chicago O'Hare Intl Airport

Our best Delta deals on Montana to Chicago O'Hare Intl Airport flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Montana to Chicago O'Hare Intl Airport that are best for you.

See travel insights to Chicago from

How to get the cheapest flight ticket from Montana to Chicago O'Hare Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Montana averaging around $304.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

What is the cheapest Montana to Chicago O'Hare Intl flight route?

Fly from Bozeman Gallatin Field to Chicago O'Hare Intl for the best Montana - Chicago O'Hare Intl flight prices

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

What cabin class options are available on Montana to Chicago O'Hare Intl flights?

There are 4 cabin classes available to choose from on Montana to Chicago O'Hare Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Montana to Chicago O'Hare Intl Airport flights?

You could potentially save up to 29% on your flight if you consider stops on a Montana to Chicago O'Hare Intl Airport flight.

What is the cheapest airline that flies from Montana to Chicago O'Hare Intl?

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Montana to Chicago O'Hare Intl

What airlines fly to Chicago O'Hare Intl Airport?

How many flights depart from Montana to Chicago O'Hare Intl Airport on average per day?

2 flights are operational daily from Montana to Chicago O'Hare Intl Airport as of November 2025. The most popular departure time for this route is 12:00PM, with 90% of flights per day taking off in the afternoon.

How many flights depart from Montana to Chicago O'Hare Intl Airport on average per week?

The number of flights available between Montana and Chicago O'Hare Intl Airport is 14 per week as of November 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

How long does it take to fly to Chicago O'Hare Intl Airport?

Cheap Montana to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montana to Chicago O'Hare Intl Airport

Best Price Found

Fastest flight time

Direct flights

When did momondo last update prices for flights from Montana to Chicago O'Hare Intl Airport?

How many operators does momondo search for flights from Montana to Chicago O'Hare Intl Airport?

How old do you have to be to fly from Montana to Chicago O'Hare Intl Airport?

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

What is the most popular plane model from Montana to Chicago O'Hare Intl Airport?

Best airlines flying from Montana to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Montana to Chicago O'Hare Intl Airport with momondo

Traveling to a place near Chicago?

Why use momondo?

Why should I use momondo to find a flight deal from Montana to Chicago?

Can I find flights from Montana to Chicago with flexible booking policies on momondo?

How can momondo help me find flights from Montana to Chicago?

I’m not ready to book a flight from Montana to Chicago right now. Can momondo alert me if prices change?

An easier way to manage your Chicago O'Hare Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Chicago

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo