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

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Illinois to Montana

How long is the flight from Illinois to Montana?

If you’re flying from a popular airport in Illinois, such as Chicago or Moline, and flying into Montana, then you can expect flight times to average 3h 14m and 6h 09m, respectively.

What airlines fly to Montana?

American Airlines, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Montana from Illinois according to our data. American Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Montana. Keep in mind that there are 5 different airlines that fly to Montana on a routine basis, so you have a few additional options to choose from.

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

As of September 2025, 22 flights take off from Illinois and land in Montana each day. The most common flight departure time for this route is 9:00AM, with 62% of daily flights taking off at noon.

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

As of September 2025, there are 160 flights per week flying from Illinois to Montana. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.

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

Prices for flights from Illinois to Montana were last updated today.

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

As of September 2025, there are 5 operators available to choose from for flights from Illinois to Montana.

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

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 Illinois to Montana.

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

The travel and health documents you'll need for your trip to Montana 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 Montana. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$110 Cheap Flights from Illinois to Montana in 2025/26

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Find the cheapest flights from Illinois to Montana

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

5:00 am - 1:08 pmORD-BZN

9h 08m1 stop

3:02 pm - 12:24 amBZN-ORD

8h 22m1 stop

$227Hawaiian Airlines

Find Deal

Sun, Nov 2 - Sun, Nov 9

7:00 am - 1:02 pmORD-BZN

7h 02m1 stop

8:00 am - 5:03 pmBZN-ORD

8h 03m1 stop

$228Alaska Airlines

Find Deal

Sat, Oct 11 - Sat, Oct 18

6:00 am - 12:12 pmSTL-BZN

7h 12m1 stop

7:00 am - 4:10 pmBZN-STL

8h 10m1 stop

$229American Airlines

Find Deal

Tue, Feb 3 - Tue, Feb 10

8:55 am - 11:16 amORD-BIL

3h 21mnonstop

11:58 am - 3:58 pmBIL-ORD

3h 00mnonstop

$229United Airlines

Find Deal

Thu, Oct 9 - Mon, Oct 13

7:30 am - 2:13 pmORD-BZN

7h 43m1 stop

3:00 pm - 11:44 pmBZN-ORD

7h 44m1 stop

$237Delta

Find Deal

Thu, Jan 29 - Mon, Feb 2

5:01 am - 9:35 amORD-BIL

5h 34m1 stop

11:58 am - 3:58 pmBIL-ORD

3h 00mnonstop

$239United Airlines

Find Deal

Thu, Oct 9 - Mon, Oct 13

5:18 am - 1:30 pmORD-BIL

9h 12m1 stop

2:00 pm - 11:37 pmBIL-ORD

8h 37m1 stop

$249American Airlines

Find Deal

Wed, Nov 12 - Sat, Nov 15

7:30 am - 2:13 pmORD-BZN

7h 43m1 stop

3:00 pm - 11:44 pmBZN-ORD

7h 44m1 stop

$253Delta

Find Deal

Thu, Feb 5 - Tue, Feb 10

5:15 am - 9:35 amMDW-BZN

5h 20m1 stop

5:45 pm - 12:05 amBZN-MDW

5h 20m1 stop

$280Southwest

Find Deal

Sun, Nov 2 - Sun, Nov 9

5:00 pm - 12:10 amMDW-BZN

8h 10m2 stops

6:15 pm - 12:35 amBZN-MDW

5h 20m1 stop

$285Southwest

Find Deal

Fri, Oct 24 - Sun, Oct 26

American Airlines flights from Illinois to Montana

Our best American Airlines deals on Illinois to Montana flight tickets

American Airlines

Feb 3

STL6:00 amLambert-St Louis

7h 12m

1 stop

BZN12:12 pmBozeman Gallatin Field

Feb 10

BZN7:00 amBozeman Gallatin Field

8h 10m

1 stop

STL4:10 pmLambert-St Louis

$229

Find similar

American Airlines

Nov 12

ORD5:18 amChicago O'Hare Intl

9h 12m

1 stop

BIL1:30 pmBillings Logan Intl

Nov 15

BIL2:00 pmBillings Logan Intl

8h 37m

1 stop

ORD11:37 pmChicago O'Hare Intl

$249

Find similar

American Airlines

Jan 5

ORD6:00 amChicago O'Hare Intl

8h 56m

1 stop

BZN1:56 pmBozeman Gallatin Field

Jan 10

BZN12:52 pmBozeman Gallatin Field

3h 03m

ORD4:55 pmChicago O'Hare Intl

$259

Find similar

Southwest flights from Illinois to Montana

Our best Southwest deals on Illinois to Montana flight tickets

Southwest

Nov 2

MDW5:15 amChicago Midway

5h 20m

1 stop

BZN9:35 amBozeman Gallatin Field

Nov 9

BZN5:45 pmBozeman Gallatin Field

5h 20m

1 stop

MDW12:05 amChicago Midway

$280

Find similar

Southwest

Oct 24

MDW5:00 pmChicago Midway

8h 10m

2 stops

BZN12:10 amBozeman Gallatin Field

Oct 26

BZN6:15 pmBozeman Gallatin Field

5h 20m

1 stop

MDW12:35 amChicago Midway

$285

Find similar

Southwest

Nov 3

MDW5:30 amChicago Midway

5h 25m

1 stop

BZN9:55 amBozeman Gallatin Field

Nov 7

BZN5:45 pmBozeman Gallatin Field

5h 20m

1 stop

MDW12:05 amChicago Midway

$290

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sun 11/2

5:00 am-1:08 pm

1 stop9h 08m

Bozeman Gallatin Field

Sun 11/9

3:02 pm-12:24 am

1 stop8h 22m

$227

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sat 10/11

7:00 am-1:02 pm

1 stop7h 02m

Bozeman Gallatin Field

Sat 10/18

8:00 am-5:03 pm

1 stop8h 03m

$228

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Tue 2/3

6:00 am-12:12 pm

1 stop7h 12m

Bozeman Gallatin Field

Tue 2/10

7:00 am-4:10 pm

1 stop8h 10m

$229

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Thu 10/9

8:55 am-11:16 am

Nonstop3h 21m

Billings Logan Intl

Mon 10/13

11:58 am-3:58 pm

Nonstop3h 00m

$229

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 1/29

7:30 am-2:13 pm

1 stop7h 43m

Bozeman Gallatin Field

Mon 2/2

3:00 pm-11:44 pm

1 stop7h 44m

$237

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Thu 10/9

5:01 am-9:35 am

1 stop5h 34m

Billings Logan Intl

Mon 10/13

11:58 am-3:58 pm

Nonstop3h 00m

$239

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Wed 11/12

5:18 am-1:30 pm

1 stop9h 12m

Billings Logan Intl

Sat 11/15

2:00 pm-11:37 pm

1 stop8h 37m

$249

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 2/5

7:30 am-2:13 pm

1 stop7h 43m

Bozeman Gallatin Field

Tue 2/10

3:00 pm-11:44 pm

1 stop7h 44m

$253

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Sun 11/2

5:15 am-9:35 am

1 stop5h 20m

Bozeman Gallatin Field

Sun 11/9

5:45 pm-12:05 am

1 stop5h 20m

$280

ChicagoBozeman

MDW - BZN

MDWBZN

Chicago Midway

Fri 10/24

5:00 pm-12:10 am

2 stops8h 10m

Bozeman Gallatin Field

Sun 10/26

6:15 pm-12:35 am

1 stop5h 20m

$285

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 Illinois to Montana

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 Montana?

The cheapest month to fly to Montana from Illinois is in September. Flight prices, which tend to average around $316, are often lower during this time because this is during the off-season. The month of August is another great option to travel to Montana, with average flight prices from Illinois averaging around $330.

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

Our data shows that Tuesday is the least expensive day to fly to Montana. Tickets to fly out on this day can be as low as $359. The most expensive day to fly to Montana is Sunday, with ticket prices averaging around $424.

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

The cheapest time of day to fly to Montana is at noon when flights can be purchased for as low as $290. In the morning is when there is more demand to fly to Montana, so prices are often more expensive at around $414 per ticket.

What is the cheapest Illinois to Montana flight route?

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

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

You are more likely to see cheaper flights to Montana from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Montana for around $424 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montana from Illinois for as low as $310 on momondo.

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

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

Cheap Illinois to Montana flight deals and tips

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

Best Price Found	$129
Fastest flight time	3h 00m
Direct flights	Every day
Airports in Montana	2 airports

The best one-way flight to Montana from Illinois in the past 72 hours is $129. The best round-trip flight deal from Illinois to Montana found on momondo in the last 72 hours is $244.

The fastest flight from Illinois to Montana takes 3h 00m

Direct flights go from Illinois to Montana every day.

There are 2 airports near Montana: Billings Logan Intl (BIL), Bozeman Gallatin Field (BZN)

Search flight deals

When did momondo last update prices for flights from Illinois to Montana?
Prices for flights from Illinois to Montana were last updated today.
How many operators does momondo search for flights from Illinois to Montana?
As of September 2025, there are 5 operators available to choose from for flights from Illinois to Montana.
How old do you have to be to fly from Illinois to Montana?
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 Illinois to Montana.
What documentation or ID do you need to fly to Montana?
The travel and health documents you'll need for your trip to Montana 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 Montana. 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 Illinois to Montana?
momondo data reveals that the most frequently booked plane model on the route from Illinois to Montana is Boeing 737-800, representing 43.54% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 15.27%, Embraer 175 at 9.99%, and Airbus A319 at 7.47%.

Best airlines flying from Illinois to Montana

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

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $210	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
American Airlines	PriceFrom $211	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $236	Free Cancellation	Rating 7.9 7,964 reviews	Search Delta flights
United Airlines	PriceFrom $248	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $267	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Montana for you.

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

momondo does allow users to show only those flights to Montana from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Illinois and Montana by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Illinois to Montana now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Montana and let you know when they change.

An easier way to manage your Montana 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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Sat 10/18

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Popular cities in Montana

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Cheap flights from Illinois to Montana from $110

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Montana departing on 10/16. 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

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Price Alerts

Find the cheapest flights from Illinois to Montana

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

American Airlines flights from Illinois to Montana

Our best American Airlines deals on Illinois to Montana flight tickets

Southwest flights from Illinois to Montana

Our best Southwest deals on Illinois to Montana flight tickets

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

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How to get the cheapest flight ticket from Illinois to Montana

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 Montana?

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

Our data shows that Tuesday is the least expensive day to fly to Montana. Tickets to fly out on this day can be as low as $359. The most expensive day to fly to Montana is Sunday, with ticket prices averaging around $424.

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

The cheapest time of day to fly to Montana is at noon when flights can be purchased for as low as $290. In the morning is when there is more demand to fly to Montana, so prices are often more expensive at around $414 per ticket.

What is the cheapest Illinois to Montana flight route?

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

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

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

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

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

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Illinois to Montana

What airlines fly to Montana?

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

As of September 2025, 22 flights take off from Illinois and land in Montana each day. The most common flight departure time for this route is 9:00AM, with 62% of daily flights taking off at noon.

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

As of September 2025, there are 160 flights per week flying from Illinois to Montana. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.

How long is the flight from Illinois to Montana?

If you’re flying from a popular airport in Illinois, such as Chicago or Moline, and flying into Montana, then you can expect flight times to average 3h 14m and 6h 09m, respectively.

Cheap Illinois to Montana flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Montana

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

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

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

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

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

Best airlines flying from Illinois to Montana

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

Why use momondo?

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

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

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

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

An easier way to manage your Montana 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 Montana

Popular cities in Montana

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