How many flights depart from Montana to Illinois on average per day?

As of August 2025, 21 flights take off from Montana and land in Illinois each day. The most common flight departure time for this route is 12:00PM, with 74% of daily flights taking off in the afternoon.

What is the cheapest airline that flies from Montana to Illinois?

Southwest, American Airlines, and Hawaiian Airlines are the most popular carriers operating from Montana to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Montana according to our data. United Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How long is the flight from Montana to Illinois?

The flight from Montana to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Billings (a popular airport in Montana) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 2h 54m on average. If you fly from Bozeman (another popular airport in Montana) to Chicago O'Hare Intl Airport, then the average flight time is 2h 59m.

How many flights depart from Montana to Illinois on average per week?

As of August 2025, 152 flights take off from Montana and land in Illinois each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

When did momondo last update prices for flights from Montana to Illinois?

Prices for flights from Montana to Illinois are refreshed on a daily basis.

How many operators does momondo search for flights from Montana to Illinois?

The number of operators available for flights from Montana to Illinois is 5 as of August 2025.

How old do you have to be to fly from Montana to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montana to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$75 Cheap Flights from Montana to Illinois in 2025

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Find the cheapest flights from Montana to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

8:00 pm - 5:15 amBZN-MDW

8h 15m1 stop

5:15 am - 9:35 amMDW-BZN

5h 20m1 stop

$174Southwest

Find Deal

Thu, Oct 30 - Sun, Nov 2

4:40 pm - 8:49 pmBZN-ORD

3h 09mnonstop

1:36 pm - 3:50 pmORD-BZN

3h 14mnonstop

$201American Airlines

Find Deal

Wed, Aug 20 - Fri, Aug 22

3:08 pm - 12:03 amBZN-ORD

7h 55m1 stop

8:00 am - 2:14 pmORD-BZN

7h 14m1 stop

$207Hawaiian Airlines

Find Deal

Tue, Sep 16 - Tue, Sep 23

3:02 pm - 12:24 amBZN-ORD

8h 22m1 stop

5:00 am - 1:08 pmORD-BZN

9h 08m1 stop

$219Hawaiian Airlines

Find Deal

Fri, Oct 31 - Sun, Nov 2

12:45 pm - 4:44 pmBZN-ORD

2h 59mnonstop

9:15 am - 11:43 amORD-BZN

3h 28mnonstop

$223United Airlines

Find Deal

Sat, Nov 1 - Mon, Nov 3

12:45 pm - 4:44 pmBZN-ORD

2h 59mnonstop

9:15 am - 11:43 amORD-BZN

3h 28mnonstop

$233United Airlines

Find Deal

Fri, Oct 31 - Sun, Nov 2

6:05 am - 12:04 pmBZN-ORD

4h 59m1 stop

7:20 pm - 11:59 pmORD-BZN

5h 39m1 stop

$237Delta

Find Deal

Wed, Aug 20 - Fri, Aug 22

7:35 am - 5:30 pmBZN-ORD

8h 55m2 stops

8:25 am - 2:27 pmORD-BZN

7h 02m1 stop

$242Delta

Find Deal

Tue, Aug 26 - Wed, Aug 27

3:02 pm - 12:24 amBZN-ORD

8h 22m1 stop

5:00 am - 1:08 pmORD-BZN

9h 08m1 stop

$245Alaska Airlines

Find Deal

Thu, Oct 30 - Sun, Nov 2

6:40 pm - 12:04 amMSO-ORD

28h 24m2 stops

8:00 am - 3:18 pmORD-MSO

8h 18m1 stop

$306Alaska Airlines

Find Deal

Fri, Sep 12 - Sun, Sep 14

Alaska Airlines flights from Montana to Illinois

Our best Alaska Airlines deals on Montana to Illinois flight tickets

Alaska Airlines

Oct 30

BZN3:02 pmBozeman Gallatin Field

8h 22m

1 stop

ORD12:24 amChicago O'Hare Intl

Nov 2

ORD5:00 amChicago O'Hare Intl

9h 08m

1 stop

BZN1:08 pmBozeman Gallatin Field

$245

Find similar

Alaska Airlines

Sep 12

MSO6:40 pmMissoula Johnson-Bell Field

28h 24m

2 stops

ORD12:04 amChicago O'Hare Intl

Sep 14

ORD8:00 amChicago O'Hare Intl

8h 18m

1 stop

MSO3:18 pmMissoula Johnson-Bell Field

$306

Find similar

Alaska Airlines

Oct 24

MSO6:40 pmMissoula Johnson-Bell Field

28h 26m

1 stop

ORD12:06 amChicago O'Hare Intl

Oct 26

ORD6:00 amChicago O'Hare Intl

7h 19m

1 stop

MSO12:19 pmMissoula Johnson-Bell Field

$309

Find similar

United Airlines flights from Montana to Illinois

Our best United Airlines deals on Montana to Illinois flight tickets

United Airlines

Nov 1

BZN12:45 pmBozeman Gallatin Field

2h 59m

ORD4:44 pmChicago O'Hare Intl

Nov 3

ORD9:15 amChicago O'Hare Intl

3h 28m

BZN11:43 amBozeman Gallatin Field

$223

Find similar

United Airlines

Oct 31

BZN12:45 pmBozeman Gallatin Field

2h 59m

ORD4:44 pmChicago O'Hare Intl

Nov 2

ORD9:15 amChicago O'Hare Intl

3h 28m

BZN11:43 amBozeman Gallatin Field

$233

Find similar

United Airlines

Sep 5

BIL12:00 pmBillings Logan Intl

3h 00m

ORD4:00 pmChicago O'Hare Intl

Sep 9

ORD6:21 pmChicago O'Hare Intl

5h 25m

1 stop

BIL10:46 pmBillings Logan Intl

$239

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BozemanChicago

BZN - MDW

BZNMDW

Bozeman Gallatin Field

Thu 10/30

8:00 pm-5:15 am

1 stop8h 15m

Chicago Midway

Sun 11/2

5:15 am-9:35 am

1 stop5h 20m

$174

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 8/20

4:40 pm-8:49 pm

Nonstop3h 09m

Chicago O'Hare Intl

Fri 8/22

1:36 pm-3:50 pm

Nonstop3h 14m

$201

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Tue 9/16

3:08 pm-12:03 am

1 stop7h 55m

Chicago O'Hare Intl

Tue 9/23

8:00 am-2:14 pm

1 stop7h 14m

$207

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 10/31

3:02 pm-12:24 am

1 stop8h 22m

Chicago O'Hare Intl

Sun 11/2

5:00 am-1:08 pm

1 stop9h 08m

$219

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Sat 11/1

12:45 pm-4:44 pm

Nonstop2h 59m

Chicago O'Hare Intl

Mon 11/3

9:15 am-11:43 am

Nonstop3h 28m

$223

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Fri 10/31

12:45 pm-4:44 pm

Nonstop2h 59m

Chicago O'Hare Intl

Sun 11/2

9:15 am-11:43 am

Nonstop3h 28m

$233

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Wed 8/20

6:05 am-12:04 pm

1 stop4h 59m

Chicago O'Hare Intl

Fri 8/22

7:20 pm-11:59 pm

1 stop5h 39m

$237

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Tue 8/26

7:35 am-5:30 pm

2 stops8h 55m

Chicago O'Hare Intl

Wed 8/27

8:25 am-2:27 pm

1 stop7h 02m

$242

BozemanChicago

BZN - ORD

BZNORD

Bozeman Gallatin Field

Thu 10/30

3:02 pm-12:24 am

1 stop8h 22m

Chicago O'Hare Intl

Sun 11/2

5:00 am-1:08 pm

1 stop9h 08m

$245

MissoulaChicago

MSO - ORD

MSOORD

Missoula Johnson-Bell Field

Fri 9/12

6:40 pm-12:04 am

2 stops28h 24m

Chicago O'Hare Intl

Sun 9/14

8:00 am-3:18 pm

1 stop8h 18m

$306

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 Illinois

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 Illinois?

The cheapest month to fly to Illinois from Montana is in July. Flight prices, which tend to average around $309, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of July, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $336.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Montana to Illinois is on a Wednesday when prices can be found for as low as $483. Flights from Montana to Illinois on a Sunday will generally be more expensive and average around $688. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Montana to Illinois during this time can be as low as $399. Flights in the morning are often more expensive with an average ticket price of $574.

What is the cheapest Montana to Illinois flight route?

Fly from Bozeman Gallatin Field to Chicago Midway for the best Montana - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Montana when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $408 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Montana for as low as $247 on momondo.

What cabin class options are available on Montana to Illinois flights?

There are 4 cabin classes available to choose from on Montana to Illinois 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 Illinois flights?

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

Cheap Montana to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montana to Illinois

Best Price Found	$75
Fastest flight time	2h 50m
Direct flights	Every day
Airports in Illinois	2 airports

The best one-way flight to Illinois from Montana in the past 72 hours is $75. The best round-trip flight deal from Montana to Illinois found on momondo in the last 72 hours is $174.

The fastest flight from Montana to Illinois takes 2h 50m

Direct flights go from Montana to Illinois every day.

There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)

Search flight deals

When did momondo last update prices for flights from Montana to Illinois?
Prices for flights from Montana to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Montana to Illinois?
The number of operators available for flights from Montana to Illinois is 5 as of August 2025.
How old do you have to be to fly from Montana to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montana to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Montana to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Montana to Illinois is Boeing 737-800 (32.41% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (15.25%), Embraer 175 (14.20%), and Embraer 175 (Enhanced Winglets) (12.78%).

Best airlines flying from Montana to Illinois

Compare and see reviews for airlines that fly from Montana to Illinois with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $191	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $216	Free Cancellation	Rating 8.0 7,987 reviews	Search Delta flights
United Airlines	PriceFrom $239	Free Cancellation	Rating 7.4 8,912 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $257	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $388	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights

Why use momondo?

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

Finding the right flight to Illinois from Montana is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

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

Flights from Montana to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Illinois from Montana. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Illinois from Montana. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Illinois 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.

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Find better results for your trip to Illinois

Popular cities in Illinois

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Flights to Washington, D.C.from $57

Flights to Bostonfrom $67

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Flights to Seattlefrom $94

Cheap flights from Montana to Illinois from $75

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 Illinois departing on 9/4. 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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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Find the cheapest flights from Montana to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Alaska Airlines flights from Montana to Illinois

Our best Alaska Airlines deals on Montana to Illinois flight tickets

United Airlines flights from Montana to Illinois

Our best United Airlines deals on Montana to Illinois flight tickets

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Use the filters below to find and compare flights from Montana to Illinois that are best for you.

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How to get the cheapest flight ticket from Montana to Illinois

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 Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Montana to Illinois during this time can be as low as $399. Flights in the morning are often more expensive with an average ticket price of $574.

What is the cheapest Montana to Illinois flight route?

Fly from Bozeman Gallatin Field to Chicago Midway for the best Montana - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on Montana to Illinois flights?

There are 4 cabin classes available to choose from on Montana to Illinois 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 Illinois flights?

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

What is the cheapest airline that flies from Montana to Illinois?

Southwest, American Airlines, and Hawaiian Airlines are the most popular carriers operating from Montana to Illinois

What airlines fly to Illinois?

How many flights depart from Montana to Illinois on average per day?

As of August 2025, 21 flights take off from Montana and land in Illinois each day. The most common flight departure time for this route is 12:00PM, with 74% of daily flights taking off in the afternoon.

How many flights depart from Montana to Illinois on average per week?

As of August 2025, 152 flights take off from Montana and land in Illinois each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

How long is the flight from Montana to Illinois?

Cheap Montana to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montana to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Montana to Illinois?

How many operators does momondo search for flights from Montana to Illinois?

How old do you have to be to fly from Montana to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Montana to Illinois?

Best airlines flying from Montana to Illinois

Compare and see reviews for airlines that fly from Montana to Illinois with momondo

Why use momondo?

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

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

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

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

An easier way to manage your Illinois 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 Illinois

Popular cities in Illinois

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