What airlines fly to Montana?

American Airlines, United Airlines and Delta 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 53% 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.

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

Delta, American Airlines, and United Airlines 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 11m and 5h 50m, respectively.

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

As of March 2026, 3 flights take off from Illinois and land in Montana each day. The most common flight departure time for this route is 9:00AM, with 59% of daily flights taking off at noon.

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

As of March 2026, there are 24 flights per week flying from Illinois to Montana. The most common day of the week flights depart is Mon, with 33% 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 March 2026, 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.

$103 Cheap Flights from Illinois to Montana in 2026

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Find the cheapest flights from Illinois to Montana

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:40 pm - 9:55 pm

STL

BZN

5h 15m

1 stop

3:20 pm - 11:10 pm

BZN

STL

6h 50m

1 stop

$211Southwest

Tue, Apr 14 - Tue, Apr 21

1:15 pm - 9:55 pm

STL

BZN

9h 40m

2 stops

9:55 am - 8:10 pm

BZN

STL

9h 15m

1 stop

$216Southwest

Tue, Apr 14 - Tue, Apr 21

3:50 pm - 11:57 pm

STL

BZN

9h 07m

1 stop

3:04 pm - 11:59 pm

BZN

STL

7h 55m

1 stop

$225Alaska Airlines

Tue, Apr 7 - Thu, Apr 9

7:41 pm - 10:12 pm

ORD

BZN

3h 31mnonstop

8:00 am - 12:03 pm

BZN

ORD

3h 03mnonstop

$229United Airlines

Mon, Mar 23 - Sat, Mar 28

7:09 pm - 9:38 pm

ORD

BZN

3h 29mnonstop

7:00 am - 11:11 am

BZN

ORD

3h 11mnonstop

$230American Airlines

Mon, Mar 23 - Sun, Mar 29

8:55 am - 1:06 pm

ORD

BZN

5h 11m

1 stop

3:19 pm - 11:52 pm

BZN

ORD

7h 33m

1 stop

$233Delta

Sun, Apr 5 - Sat, Apr 11

9:05 am - 11:31 am

ORD

BZN

3h 26mnonstop

2:40 pm - 10:58 pm

BZN

ORD

7h 18m

1 stop

$235United Airlines

Wed, Apr 22 - Sat, Apr 25

6:00 am - 2:10 pm

ORD

BZN

9h 10m

1 stop

7:26 pm - 6:39 am

BZN

ORD

10h 13m

1 stop

$237Alaska Airlines

Thu, Apr 16 - Mon, Apr 20

6:25 am - 2:35 pm

ORD

BZN

9h 10m

2 stops

1:12 pm - 9:50 pm

BZN

ORD

7h 38m

1 stop

$238Delta

Tue, May 5 - Tue, May 12

7:09 pm - 9:38 pm

ORD

BZN

3h 29mnonstop

3:36 pm - 11:36 pm

BZN

ORD

7h 00m

1 stop

$239American Airlines

Thu, Mar 26 - Mon, Mar 30

Southwest flights from Illinois to Montana

Our best Southwest deals on Illinois to Montana flight tickets

Southwest

Apr 14

STL5:40 pmLambert-St Louis

5h 15m

1 stop

BZN9:55 pmBozeman Gallatin Field

Apr 21

BZN3:20 pmBozeman Gallatin Field

6h 50m

1 stop

STL11:10 pmLambert-St Louis

$211

Southwest

Apr 14

STL1:15 pmLambert-St Louis

9h 40m

2 stops

BZN9:55 pmBozeman Gallatin Field

Apr 21

BZN9:55 amBozeman Gallatin Field

9h 15m

1 stop

STL8:10 pmLambert-St Louis

$216

Southwest

Apr 14

STL2:30 pmLambert-St Louis

8h 25m

2 stops

BZN9:55 pmBozeman Gallatin Field

Apr 21

BZN8:10 amBozeman Gallatin Field

8h 45m

2 stops

STL5:55 pmLambert-St Louis

$221

American Airlines flights from Illinois to Montana

Our best American Airlines deals on Illinois to Montana flight tickets

American Airlines

Mar 26

ORD7:09 pmChicago O'Hare Intl

3h 29m

BZN9:38 pmBozeman Gallatin Field

Mar 29

BZN7:00 amBozeman Gallatin Field

3h 11m

ORD11:11 amChicago O'Hare Intl

$229

American Airlines

Mar 23

ORD7:09 pmChicago O'Hare Intl

3h 29m

BZN9:38 pmBozeman Gallatin Field

Mar 29

BZN7:00 amBozeman Gallatin Field

3h 11m

ORD11:11 amChicago O'Hare Intl

$230

American Airlines

Mar 26

ORD7:09 pmChicago O'Hare Intl

3h 29m

BZN9:38 pmBozeman Gallatin Field

Mar 30

BZN3:36 pmBozeman Gallatin Field

7h 00m

1 stop

ORD11:36 pmChicago O'Hare Intl

$239

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Tue 4/14

5:40 pm-9:55 pm

1 stop5h 15m

Bozeman Gallatin Field

Tue 4/21

3:20 pm-11:10 pm

1 stop6h 50m

$211

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Tue 4/14

1:15 pm-9:55 pm

2 stops9h 40m

Bozeman Gallatin Field

Tue 4/21

9:55 am-8:10 pm

1 stop9h 15m

$216

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Tue 4/7

3:50 pm-11:57 pm

1 stop9h 07m

Bozeman Gallatin Field

Thu 4/9

3:04 pm-11:59 pm

1 stop7h 55m

$225

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Mon 3/23

7:41 pm-10:12 pm

Nonstop3h 31m

Bozeman Gallatin Field

Sat 3/28

8:00 am-12:03 pm

Nonstop3h 03m

$229

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Mon 3/23

7:09 pm-9:38 pm

Nonstop3h 29m

Bozeman Gallatin Field

Sun 3/29

7:00 am-11:11 am

Nonstop3h 11m

$230

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Sun 4/5

8:55 am-1:06 pm

1 stop5h 11m

Bozeman Gallatin Field

Sat 4/11

3:19 pm-11:52 pm

1 stop7h 33m

$233

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Wed 4/22

9:05 am-11:31 am

Nonstop3h 26m

Bozeman Gallatin Field

Sat 4/25

2:40 pm-10:58 pm

1 stop7h 18m

$235

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 4/16

6:00 am-2:10 pm

1 stop9h 10m

Bozeman Gallatin Field

Mon 4/20

7:26 pm-6:39 am

1 stop10h 13m

$237

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Tue 5/5

6:25 am-2:35 pm

2 stops9h 10m

Bozeman Gallatin Field

Tue 5/12

1:12 pm-9:50 pm

1 stop7h 38m

$238

ChicagoBozeman

ORD - BZN

ORDBZN

Chicago O'Hare Intl

Thu 3/26

7:09 pm-9:38 pm

Nonstop3h 29m

Bozeman Gallatin Field

Mon 3/30

3:36 pm-11:36 pm

1 stop7h 00m

$239

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 $302, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Montana, with average flight prices from Illinois averaging around $309.

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 $306. The most expensive day to fly to Montana is Thursday, with ticket prices averaging around $392.

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 $298. In the afternoon is when there is more demand to fly to Montana, so prices are often more expensive at around $399 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 $373 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 $282 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.

Can stopping save me money on Illinois to Montana flights?

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

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	$176
Fastest flight time	3h 05m
Direct flights	Every day
Airports in Montana	32 airports

The best one-way flight to Montana from Illinois in the past 72 hours is $176. The best round-trip flight deal from Illinois to Montana found on momondo in the last 72 hours is $254.

The fastest flight from Illinois to Montana takes 3h 05m

Direct flights go from Illinois to Montana every day.

There are 32 airports in Montana. From Illinois there are direct flights to 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 March 2026, 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 40.05% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 19.02%, Embraer 175 (Enhanced Winglets) at 12.12%, and Boeing 737 MAX 9 at 9.05%.

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
Delta	PriceFrom $169	Free Cancellation	Rating 7.9 8,245 reviews	Search Delta flights
American Airlines	PriceFrom $210	Free Cancellation	Rating 7.1 11,378 reviews	Search American Airlines flights
Southwest	PriceFrom $210	Free Cancellation	Rating 8.0 4,304 reviews	Search Southwest flights
United Airlines	PriceFrom $231	Free Cancellation	Rating 7.4 9,382 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $291	Free Cancellation	Rating 8.0 11,982 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.

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Popular cities in Montana

Flights to New Yorkfrom $37

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Flights to Orlandofrom $36

Flights to Chicagofrom $56

Flights to San Franciscofrom $58

Flights to Las Vegasfrom $55

Flights to Washington, D.C.from $56

Flights to Bostonfrom $77

Flights to Atlantafrom $49

Flights to Dallasfrom $60

Flights to Seattlefrom $55

Cheap flights from Illinois to Montana from $103

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 4/29. 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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Southwest flights from Illinois to Montana

Our best Southwest deals on Illinois to Montana flight tickets

American Airlines flights from Illinois to Montana

Our best American Airlines deals on Illinois to Montana flight tickets

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How to get the cheapest flight ticket from Illinois to Montana

What is the cheapest month to fly to Montana?

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

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

What is the cheapest Illinois to Montana flight route?

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

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

Can stopping save me money on Illinois to Montana flights?

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

What airlines fly to Montana?

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

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

How long is the flight from Illinois to Montana?

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

Best airlines flying from Illinois to Montana

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

Why use momondo?

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

Illinois flight routes

According to popular flight searches on momondo this year

Montana flight routes

According to popular flight searches on momondo this year

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