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Cheap flights from Montana to Chicago from $129

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 7/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Montana to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
11:35 am - 5:57 pm
BIL
-
ORD
5h 22m
1 stop
Delta Logo
3:50 pm - 7:48 pm
ORD
-
BIL
4h 58m
1 stop
$271Delta
Wed, Oct 21 - Sat, Oct 24
Delta Logo
11:35 am - 5:57 pm
BIL
-
ORD
5h 22m
1 stop
Delta Logo
1:35 pm - 10:32 pm
ORD
-
BIL
9h 57m
2 stops
$276Delta
Wed, Oct 21 - Sat, Oct 24
American Airlines Logo
5:03 pm - 9:30 pm
BZN
-
ORD
3h 27mnonstop
American Airlines Logo
10:09 am - 12:34 pm
ORD
-
BZN
3h 25mnonstop
$285American Airlines
Wed, Jul 29 - Tue, Aug 4
United Airlines Logo
2:37 pm - 10:44 pm
BZN
-
ORD
7h 07m
1 stop
United Airlines Logo
9:10 am - 11:33 am
ORD
-
BZN
3h 23mnonstop
$291United Airlines
Wed, Nov 4 - Tue, Nov 10
United Airlines Logo
12:48 pm - 4:57 pm
BZN
-
ORD
3h 09mnonstop
United Airlines Logo
5:00 am - 9:37 am
ORD
-
BZN
5h 37m
1 stop
$295United Airlines
Thu, Jun 11 - Mon, Jun 15
Delta Logo
5:20 am - 11:59 am
BIL
-
ORD
5h 39m
1 stop
Delta Logo
5:54 pm - 11:20 pm
ORD
-
BIL
6h 26m
1 stop
$298Delta
Sat, Jul 11 - Mon, Jul 13
American Airlines Logo
1:29 pm - 6:00 pm
MSO
-
ORD
3h 31mnonstop
American Airlines Logo
9:50 am - 12:39 pm
ORD
-
MSO
3h 49mnonstop
$309American Airlines
Thu, Oct 22 - Mon, Oct 26
Alaska Airlines Logo
7:00 am - 4:50 pm
MSO
-
ORD
8h 50m
1 stop
Alaska Airlines Logo
7:00 am - 3:34 pm
ORD
-
MSO
9h 34m
1 stop
$329Alaska Airlines
Thu, Oct 29 - Mon, Nov 2
Multiple Airlines Logo
10:24 am - 5:28 am
MSO
-
ORD
18h 04m
1 stop
Multiple Airlines Logo
5:30 pm - 9:02 pm
ORD
-
MSO
52h 32m
2 stops
$332Multiple Airlines
Thu, Aug 13 - Tue, Aug 18
Alaska Airlines Logo
6:52 pm - 6:20 am
GTF
-
ORD
10h 28m
1 stop
Alaska Airlines Logo
7:49 pm - 6:12 pm
ORD
-
GTF
23h 23m
1 stop
$393Alaska Airlines
Tue, Jun 2 - Fri, Jun 5

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
Jul 29
BZN5:03 pmBozeman Gallatin Field
3h 27m
ORD9:30 pmChicago O'Hare Intl
Aug 4
ORD10:09 amChicago O'Hare Intl
3h 25m
BZN12:34 pmBozeman Gallatin Field
$285
American Airlines
Oct 22
MSO1:29 pmMissoula Johnson-Bell Field
3h 31m
ORD6:00 pmChicago O'Hare Intl
Oct 26
ORD9:50 amChicago O'Hare Intl
3h 49m
MSO12:39 pmMissoula Johnson-Bell Field
$309
American Airlines
Aug 27
MSO1:25 pmMissoula Johnson-Bell Field
9h 33m
1 stop
ORD11:58 pmChicago O'Hare Intl
Aug 31
ORD9:54 amChicago O'Hare Intl
3h 51m
MSO12:45 pmMissoula Johnson-Bell Field
$318

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
Oct 29
MSO7:00 amMissoula Johnson-Bell Field
8h 50m
1 stop
ORD4:50 pmChicago O'Hare Intl
Oct 31
ORD6:00 amChicago O'Hare Intl
9h 50m
1 stop
MSO2:50 pmMissoula Johnson-Bell Field
$329
Alaska Airlines
May 28
MSO2:03 pmMissoula Johnson-Bell Field
8h 56m
1 stop
ORD11:59 pmChicago O'Hare Intl
Jun 1
ORD6:00 amChicago O'Hare Intl
9h 43m
1 stop
MSO2:43 pmMissoula Johnson-Bell Field
$359
Alaska Airlines
Jun 3
BZN1:57 pmBozeman Gallatin Field
9h 02m
1 stop
ORD11:59 pmChicago O'Hare Intl
Jun 10
ORD6:00 amChicago O'Hare Intl
9h 09m
1 stop
BZN2:09 pmBozeman Gallatin Field
$365

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 May 15, 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

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Wed 10/21

11:35 am-5:57 pm

1 stop5h 22m

Chicago O'Hare Intl

Sat 10/24

3:50 pm-7:48 pm

1 stop4h 58m

$271

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Wed 10/21

11:35 am-5:57 pm

1 stop5h 22m

Chicago O'Hare Intl

Sat 10/24

1:35 pm-10:32 pm

2 stops9h 57m

$276
Quickest round-trip

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 7/29

5:03 pm-9:30 pm

Nonstop3h 27m

Chicago O'Hare Intl

Tue 8/4

10:09 am-12:34 pm

Nonstop3h 25m

$285

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 11/4

2:37 pm-10:44 pm

1 stop7h 07m

Chicago O'Hare Intl

Tue 11/10

9:10 am-11:33 am

Nonstop3h 23m

$291

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 6/11

12:48 pm-4:57 pm

Nonstop3h 09m

Chicago O'Hare Intl

Mon 6/15

5:00 am-9:37 am

1 stop5h 37m

$295

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sat 7/11

5:20 am-11:59 am

1 stop5h 39m

Chicago O'Hare Intl

Mon 7/13

5:54 pm-11:20 pm

1 stop6h 26m

$298

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Thu 10/22

1:29 pm-6:00 pm

Nonstop3h 31m

Chicago O'Hare Intl

Mon 10/26

9:50 am-12:39 pm

Nonstop3h 49m

$309

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Thu 10/29

7:00 am-4:50 pm

1 stop8h 50m

Chicago O'Hare Intl

Mon 11/2

7:00 am-3:34 pm

1 stop9h 34m

$329

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Thu 8/13

10:24 am-5:28 am

1 stop18h 04m

Chicago O'Hare Intl

Tue 8/18

5:30 pm-9:02 pm

2 stops52h 32m

$332

Great FallsChicago

GTF - ORD

GTFORD

Great Falls

Tue 6/2

6:52 pm-6:20 am

1 stop10h 28m

Chicago O'Hare Intl

Fri 6/5

7:49 pm-6:12 pm

1 stop23h 23m

$393

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 August is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Montana averaging around $133.

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 $397. 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 $590.

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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $386 when looking at flights departing at noon. Try not to purchase tickets in the morning because they tend to be around $463. 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 $341 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 $202 on momondo.

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

No. A direct flight is the cheapest option for a flight between Montana 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

$229

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 $229. The best round-trip flight deal from Montana to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $378.
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
DeltaPriceFrom $129Free CancellationRating
7.9
8,455 reviews
Search Delta flights
Alaska AirlinesPriceFrom $166Free CancellationRating
7.9
12,366 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $191Free CancellationRating
7.1
11,666 reviews
Search American Airlines flights
United AirlinesPriceFrom $229Free CancellationRating
7.4
9,718 reviews
Search United Airlines flights

Traveling to a place near Chicago?

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

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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