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Cheap flights from Montana to Chicago from $99

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 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Montana to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
3:40 pm - 11:46 pmBZN  Bozeman Gallatin Field-ORD Chicago O'Hare Intl
7h 06m1 stop Seattle/Tacoma Intl
Delta Logo
6:59 pm - 12:10 amORD  Chicago O'Hare Intl-BZN Bozeman Gallatin Field
6h 11m1 stop Salt Lake City
$217Delta
Mon, Jan 25 - Tue, Jan 26
Delta Logo
8:25 am - 6:00 pmBZN  Bozeman Gallatin Field-ORD Chicago O'Hare Intl
8h 35m1 stop Seattle/Tacoma Intl
Delta Logo
6:40 am - 1:38 pmORD  Chicago O'Hare Intl-BZN Bozeman Gallatin Field
7h 58m1 stop Atlanta Hartsfield-Jackson
$217Delta
Sat, Sep 26 - Sat, Oct 3
United Airlines Logo
2:28 pm - 9:52 pmBIL  Billings Logan Intl-ORD Chicago O'Hare Intl
6h 24m1 stop Denver Intl
United Airlines Logo
5:00 am - 9:46 amORD  Chicago O'Hare Intl-BIL Billings Logan Intl
5h 46m1 stop Denver Intl
$292United Airlines
Sat, Sep 26 - Wed, Sep 30
United Airlines Logo
12:53 pm - 5:00 pmBZN  Bozeman Gallatin Field-ORD Chicago O'Hare Intl
3h 07mnonstop
United Airlines Logo
9:07 am - 11:45 amORD  Chicago O'Hare Intl-BZN Bozeman Gallatin Field
3h 38mnonstop
$295United Airlines
Fri, Oct 23 - Mon, Oct 26
American Airlines Logo
1:15 pm - 5:29 pmBZN  Bozeman Gallatin Field-ORD Chicago O'Hare Intl
3h 14mnonstop
American Airlines Logo
9:58 am - 12:25 pmORD  Chicago O'Hare Intl-BZN Bozeman Gallatin Field
3h 27mnonstop
$295American Airlines
Thu, Oct 8 - Mon, Oct 12
American Airlines Logo
1:43 pm - 5:52 pmBZN  Bozeman Gallatin Field-ORD Chicago O'Hare Intl
3h 09mnonstop
American Airlines Logo
10:16 am - 12:43 pmORD  Chicago O'Hare Intl-BZN Bozeman Gallatin Field
3h 27mnonstop
$295American Airlines
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
2:40 pm - 5:38 amMSO  Missoula Johnson-Bell Field-ORD Chicago O'Hare Intl
13h 58m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
1:21 pm - 9:27 amORD  Chicago O'Hare Intl-MSO Missoula Johnson-Bell Field
21h 06m1 stop Las Vegas Harry Reid Intl
$322Multiple Airlines
Thu, Oct 1 - Wed, Oct 7
Alaska Airlines Logo
5:19 pm - 6:20 amGTF  Great Falls-ORD Chicago O'Hare Intl
12h 01m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
8:00 am - 4:39 pmORD  Chicago O'Hare Intl-GTF Great Falls
9h 39m1 stop Seattle/Tacoma Intl
$328Alaska Airlines
Fri, Sep 25 - Fri, Oct 2
Alaska Airlines Logo
7:03 am - 5:37 pmMSO  Missoula Johnson-Bell Field-ORD Chicago O'Hare Intl
9h 34m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
9:30 am - 9:18 pmORD  Chicago O'Hare Intl-MSO Missoula Johnson-Bell Field
12h 48m1 stop Seattle/Tacoma Intl
$339Alaska Airlines
Thu, Nov 12 - Sun, Nov 15
Multiple Airlines Logo
6:05 pm - 9:39 pmMSO  Missoula Johnson-Bell Field-ORD Chicago O'Hare Intl
26h 34m2 stops Las Vegas Harry Reid Intl Houston George Bush Intcntl
Multiple Airlines Logo
1:21 pm - 9:27 amORD  Chicago O'Hare Intl-MSO Missoula Johnson-Bell Field
21h 06m1 stop Las Vegas Harry Reid Intl
$339Multiple Airlines
Sun, Oct 4 - Wed, Oct 7

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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
Sep 17
BZN1:43 pmBozeman Gallatin Field
3h 09m
ORD5:52 pmChicago O'Hare Intl
Sep 21
ORD10:16 amChicago O'Hare Intl
3h 27m
BZN12:43 pmBozeman Gallatin Field
$295
American Airlines
Sep 11
BZN4:16 pmBozeman Gallatin Field
6h 58m
1 stop
ORD12:14 amChicago O'Hare Intl
Sep 21
ORD10:16 amChicago O'Hare Intl
3h 27m
BZN12:43 pmBozeman Gallatin Field
$305
American Airlines
Sep 24
BZN4:16 pmBozeman Gallatin Field
6h 58m
1 stop
ORD12:14 amChicago O'Hare Intl
Sep 28
ORD10:16 amChicago O'Hare Intl
3h 27m
BZN12:43 pmBozeman Gallatin Field
$306

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

Our best Alaska Airlines deals on Montana to Chicago O'Hare Intl Airport flight tickets
Alaska Airlines
Nov 7
MSO2:02 pmMissoula Johnson-Bell Field
8h 57m
1 stop
ORD11:59 pmChicago O'Hare Intl
Nov 10
ORD7:00 amChicago O'Hare Intl
9h 27m
1 stop
MSO3:27 pmMissoula Johnson-Bell Field
$369
Alaska Airlines
Oct 1
MSO4:16 pmMissoula Johnson-Bell Field
6h 43m
1 stop
ORD11:59 pmChicago O'Hare Intl
Oct 5
ORD6:00 amChicago O'Hare Intl
9h 50m
1 stop
MSO2:50 pmMissoula Johnson-Bell Field
$399
Alaska Airlines
Aug 28
BZN9:20 amBozeman Gallatin Field
9h 01m
1 stop
ORD7:21 pmChicago O'Hare Intl
Sep 5
ORD1:03 pmChicago O'Hare Intl
10h 56m
1 stop
BZN10:59 pmBozeman Gallatin Field
$406

momondo Fare Finder

 
Customize your flight search to find flights from Montana to Chicago O'Hare Intl Airport 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, momondo users made 832,500 searches. Data last updated August 14, 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BozemanChicago

BZN Bozeman Gallatin Field - ORD Chicago O'Hare Intl

BZNORD

Bozeman Gallatin Field

Mon 1/25

3:40 pm-11:46 pm

1 stop7h 06m

Chicago O'Hare Intl

Tue 1/26

6:59 pm-12:10 am

1 stop6h 11m

$217

BozemanChicago

BZN Bozeman Gallatin Field - ORD Chicago O'Hare Intl

BZNORD

Bozeman Gallatin Field

Sat 9/26

8:25 am-6:00 pm

1 stop8h 35m

Chicago O'Hare Intl

Sat 10/3

6:40 am-1:38 pm

1 stop7h 58m

$217

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Sat 9/26

2:28 pm-9:52 pm

1 stop6h 24m

Chicago O'Hare Intl

Wed 9/30

5:00 am-9:46 am

1 stop5h 46m

$292

BozemanChicago

BZN Bozeman Gallatin Field - ORD Chicago O'Hare Intl

BZNORD

Bozeman Gallatin Field

Fri 10/23

12:53 pm-5:00 pm

Nonstop3h 07m

Chicago O'Hare Intl

Mon 10/26

9:07 am-11:45 am

Nonstop3h 38m

$295

BozemanChicago

BZN Bozeman Gallatin Field - ORD Chicago O'Hare Intl

BZNORD

Bozeman Gallatin Field

Thu 10/8

1:15 pm-5:29 pm

Nonstop3h 14m

Chicago O'Hare Intl

Mon 10/12

9:58 am-12:25 pm

Nonstop3h 27m

$295
Quickest round-trip

BozemanChicago

BZN Bozeman Gallatin Field - ORD Chicago O'Hare Intl

BZNORD

Bozeman Gallatin Field

Thu 9/17

1:43 pm-5:52 pm

Nonstop3h 09m

Chicago O'Hare Intl

Mon 9/21

10:16 am-12:43 pm

Nonstop3h 27m

$295

MissoulaChicago

MSO Missoula Johnson-Bell Field - ORD Chicago O'Hare Intl

MSOORD

Missoula Johnson-Bell Field

Thu 10/1

2:40 pm-5:38 am

1 stop13h 58m

Chicago O'Hare Intl

Wed 10/7

1:21 pm-9:27 am

1 stop21h 06m

$322

Great FallsChicago

GTF Great Falls - ORD Chicago O'Hare Intl

GTFORD

Great Falls

Fri 9/25

5:19 pm-6:20 am

1 stop12h 01m

Chicago O'Hare Intl

Fri 10/2

8:00 am-4:39 pm

1 stop9h 39m

$328

MissoulaChicago

MSO Missoula Johnson-Bell Field - ORD Chicago O'Hare Intl

MSOORD

Missoula Johnson-Bell Field

Thu 11/12

7:03 am-5:37 pm

1 stop9h 34m

Chicago O'Hare Intl

Sun 11/15

9:30 am-9:18 pm

1 stop12h 48m

$339

MissoulaChicago

MSO Missoula Johnson-Bell Field - ORD Chicago O'Hare Intl

MSOORD

Missoula Johnson-Bell Field

Sun 10/4

6:05 pm-9:39 pm

2 stops26h 34m

Chicago O'Hare Intl

Wed 10/7

1:21 pm-9:27 am

1 stop21h 06m

$339

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 May is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Montana averaging around $341.

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 Thursday when prices can be found for as low as $415. 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 $598.

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 $430 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around $472. 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 from Montana 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 $363 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 $294 on momondo.

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

There are 4 cabin classes available to choose from on Montana to Chicago O'Hare Intl Airport 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 22% 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

$246

Fastest flight time

2h 59m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Montana in the past 72 hours is $246. The best round-trip flight deal from Montana to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $430.
The fastest flight from Montana to Chicago O'Hare Intl Airport takes 2h 59m
Direct flights go from Montana to Chicago O'Hare Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Montana to Chicago O'Hare Intl Airport

  • 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?

  • 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?

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 AirlinesPriceFrom $215Free CancellationRating
7.1
11,939 reviews
Search American Airlines flights
United AirlinesPriceFrom $229Free CancellationRating
7.4
10,112 reviews
Search United Airlines flights
DeltaPriceFrom $230Free CancellationRating
7.8
8,509 reviews
Search Delta flights
Alaska AirlinesPriceFrom $350Free CancellationRating
7.9
12,811 reviews
Search Alaska Airlines flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
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Schaumburg
Merrillville
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Gurnee
Rosemont
Oak Brook
Orland Park
Naperville
Joliet
New Buffalo
Kenosha
Hammond
Racine
Aurora
Janesville
Elgin
South Holland
Evanston

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.

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