What airlines fly to Montana?

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Montana from Ontario according to our data. United Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Montana. Keep in mind that there are 6 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 Ontario to Montana?

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

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

Prices for flights from Ontario Airport to Montana were last updated today.

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

As of August 2026, there are 4 operators available to choose from for flights from Ontario Airport to Montana.

How old do you have to be to fly from Ontario Airport to Montana?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Montana.

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

The travel and health documents required for your trip to Montana can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Montana. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$109 Cheap Flights from Ontario to Montana in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Montana

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 7:18 pmONT Ontario-FCA Kalispell Glacier Park

10h 18m1 stop Las Vegas Harry Reid Intl

8:08 pm - 10:21 amFCA Kalispell Glacier Park-ONT Ontario

15h 13m1 stop Las Vegas Harry Reid Intl

$215Multiple Airlines

Mon, Oct 12 - Mon, Oct 19

1:50 pm - 10:25 pmONT Ontario-BZN Bozeman Gallatin Field

7h 35m1 stop Denver Intl

6:55 am - 12:40 pmBZN Bozeman Gallatin Field-ONT Ontario

6h 45m1 stop Las Vegas Harry Reid Intl

$217Southwest

Tue, Sep 1 - Wed, Sep 2

5:15 pm - 12:19 amONT Ontario-BZN Bozeman Gallatin Field

6h 04m1 stop Salt Lake City

6:00 am - 9:02 amBZN Bozeman Gallatin Field-ONT Ontario

4h 02m1 stop Salt Lake City

$217Delta

Mon, Sep 14 - Thu, Sep 17

2:30 pm - 8:52 pmONT Ontario-BZN Bozeman Gallatin Field

5h 22m1 stop Las Vegas Harry Reid Intl

9:42 pm - 7:04 amBZN Bozeman Gallatin Field-ONT Ontario

10h 22m1 stop Las Vegas Harry Reid Intl

$218Multiple Airlines

Thu, Sep 24 - Sun, Sep 27

1:50 pm - 10:25 pmONT Ontario-BZN Bozeman Gallatin Field

7h 35m1 stop Denver Intl

6:55 am - 1:10 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 15m2 stops Las Vegas Harry Reid Intl Sacramento Intl

$222Southwest

Tue, Sep 1 - Wed, Sep 2

5:03 pm - 10:38 pmONT Ontario-BZN Bozeman Gallatin Field

4h 35m1 stop Salt Lake City

5:30 am - 8:55 amBZN Bozeman Gallatin Field-ONT Ontario

4h 25m1 stop Salt Lake City

$279Delta

Sat, Oct 10 - Mon, Oct 12

3:14 pm - 10:59 pmONT Ontario-BZN Bozeman Gallatin Field

6h 45m1 stop Seattle/Tacoma Intl

2:21 pm - 7:03 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 42m1 stop Seattle/Tacoma Intl

$287Alaska Airlines

Thu, Sep 17 - Tue, Sep 22

2:13 pm - 10:59 pmONT Ontario-FCA Kalispell Glacier Park

7h 46m1 stop Seattle/Tacoma Intl

7:45 pm - 11:42 pmFCA Kalispell Glacier Park-ONT Ontario

4h 57m1 stop Seattle/Tacoma Intl

$287Alaska Airlines

Tue, Oct 27 - Fri, Oct 30

1:18 pm - 9:19 pmONT Ontario-BZN Bozeman Gallatin Field

7h 01m1 stop Denver Intl

6:30 am - 12:50 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 20m1 stop Denver Intl

$297United Airlines

Tue, Sep 1 - Thu, Sep 10

5:00 am - 1:24 pmONT Ontario-BZN Bozeman Gallatin Field

7h 24m1 stop Denver Intl

4:32 pm - 8:53 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 21m1 stop Denver Intl

$297United Airlines

Mon, Aug 31 - Thu, Sep 10

Cheap last minute flights

Enter your travel dates to find the best prices.

2:05 pm - 11:19 pmONT Ontario-BZN Bozeman Gallatin Field

8h 14m1 stop Seattle/Tacoma Intl

7:03 am - 2:09 pmBZN Bozeman Gallatin Field-ONT Ontario

8h 06m1 stop Seattle/Tacoma Intl

$389Alaska Airlines

Tue, Aug 18 - Wed, Aug 19

2:05 pm - 11:19 pmONT Ontario-BZN Bozeman Gallatin Field

8h 14m1 stop Seattle/Tacoma Intl

7:03 am - 2:09 pmBZN Bozeman Gallatin Field-ONT Ontario

8h 06m1 stop Seattle/Tacoma Intl

$389Alaska Airlines

Mon, Aug 17 - Fri, Aug 21

6:15 am - 1:05 pmONT Ontario-BZN Bozeman Gallatin Field

5h 50m1 stop Phoenix Sky Harbor Intl

4:15 pm - 10:59 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 44m1 stop Dallas/Fort Worth

$404American Airlines

Tue, Aug 18 - Mon, Aug 24

6:00 am - 11:09 amONT Ontario-FCA Kalispell Glacier Park

4h 09m1 stop Salt Lake City

5:15 am - 8:52 amFCA Kalispell Glacier Park-ONT Ontario

4h 37m1 stop Salt Lake City

$420Delta

Tue, Aug 18 - Tue, Aug 25

6:00 am - 11:45 amONT Ontario-FCA Kalispell Glacier Park

4h 45m1 stop Salt Lake City

5:15 am - 8:52 amFCA Kalispell Glacier Park-ONT Ontario

4h 37m1 stop Salt Lake City

$469Delta

Sat, Aug 15 - Mon, Aug 17

5:40 am - 11:45 amONT Ontario-BZN Bozeman Gallatin Field

5h 05m1 stop Las Vegas Harry Reid Intl

2:35 pm - 8:50 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 15m1 stop Denver Intl

$479Southwest

Fri, Aug 14 - Sat, Aug 15

1:18 pm - 9:21 pmONT Ontario-FCA Kalispell Glacier Park

7h 03m1 stop Denver Intl

7:15 am - 12:12 pmFCA Kalispell Glacier Park-ONT Ontario

5h 57m1 stop San Francisco

$489United Airlines

Tue, Aug 18 - Wed, Aug 19

1:56 pm - 7:51 pmONT Ontario-FCA Kalispell Glacier Park

4h 55m1 stop San Francisco

4:17 pm - 10:59 pmFCA Kalispell Glacier Park-ONT Ontario

7h 42m1 stop San Francisco

$489United Airlines

Tue, Aug 18 - Fri, Aug 21

6:00 am - 2:34 pmONT Ontario-FCA Kalispell Glacier Park

7h 34m1 stop Dallas/Fort Worth

3:45 pm - 10:59 pmFCA Kalispell Glacier Park-ONT Ontario

8h 14m1 stop Dallas/Fort Worth

$489American Airlines

Tue, Aug 18 - Tue, Aug 25

5:45 pm - 11:40 pmONT Ontario-BZN Bozeman Gallatin Field

4h 55m1 stop Las Vegas Harry Reid Intl

8:35 am - 3:15 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 40m2 stops Denver Intl Phoenix Sky Harbor Intl

$494Southwest

Fri, Aug 14 - Sat, Aug 15

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Southwest flights from Ontario to Montana

Our best Southwest deals on Ontario to Montana flight tickets

Southwest

Sep 1

ONT1:50 pmOntario

7h 35m

1 stop

BZN10:25 pmBozeman Gallatin Field

Sep 2

BZN6:55 amBozeman Gallatin Field

6h 45m

1 stop

ONT12:40 pmOntario

$217

Southwest

Sep 1

ONT1:50 pmOntario

7h 35m

1 stop

BZN10:25 pmBozeman Gallatin Field

Sep 2

BZN6:55 amBozeman Gallatin Field

7h 15m

2 stops

ONT1:10 pmOntario

$222

Southwest

Sep 1

ONT11:10 amOntario

7h 50m

2 stops

BZN8:00 pmBozeman Gallatin Field

Sep 2

BZN6:55 amBozeman Gallatin Field

7h 40m

2 stops

ONT1:35 pmOntario

$234

Alaska Airlines flights from Ontario to Montana

Our best Alaska Airlines deals on Ontario to Montana flight tickets

Alaska Airlines

Sep 17

ONT3:14 pmOntario

6h 45m

1 stop

BZN10:59 pmBozeman Gallatin Field

Sep 22

BZN2:21 pmBozeman Gallatin Field

5h 42m

1 stop

ONT7:03 pmOntario

$287

Alaska Airlines

Aug 31

ONT3:07 pmOntario

6h 52m

1 stop

BZN10:59 pmBozeman Gallatin Field

Sep 9

BZN7:03 amBozeman Gallatin Field

8h 13m

1 stop

ONT2:16 pmOntario

$312

Alaska Airlines

Oct 10

ONT11:13 amOntario

6h 52m

1 stop

FCA7:05 pmKalispell Glacier Park

Oct 16

FCA7:45 pmKalispell Glacier Park

4h 57m

1 stop

ONT11:42 pmOntario

$313

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioKalispell

ONT Ontario - FCA Kalispell Glacier Park

ONTFCA

Ontario

Mon 10/12

8:00 am-7:18 pm

1 stop10h 18m

Kalispell Glacier Park

Mon 10/19

8:08 pm-10:21 am

1 stop15h 13m

$215

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Tue 9/1

1:50 pm-10:25 pm

1 stop7h 35m

Bozeman Gallatin Field

Wed 9/2

6:55 am-12:40 pm

1 stop6h 45m

$217

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Mon 9/14

5:15 pm-12:19 am

1 stop6h 04m

Bozeman Gallatin Field

Thu 9/17

6:00 am-9:02 am

1 stop4h 02m

$217

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Thu 9/24

2:30 pm-8:52 pm

1 stop5h 22m

Bozeman Gallatin Field

Sun 9/27

9:42 pm-7:04 am

1 stop10h 22m

$218

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Tue 9/1

1:50 pm-10:25 pm

1 stop7h 35m

Bozeman Gallatin Field

Wed 9/2

6:55 am-1:10 pm

2 stops7h 15m

$222

Quickest round-trip

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Sat 10/10

5:03 pm-10:38 pm

1 stop4h 35m

Bozeman Gallatin Field

Mon 10/12

5:30 am-8:55 am

1 stop4h 25m

$279

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Thu 9/17

3:14 pm-10:59 pm

1 stop6h 45m

Bozeman Gallatin Field

Tue 9/22

2:21 pm-7:03 pm

1 stop5h 42m

$287

OntarioKalispell

ONT Ontario - FCA Kalispell Glacier Park

ONTFCA

Ontario

Tue 10/27

2:13 pm-10:59 pm

1 stop7h 46m

Kalispell Glacier Park

Fri 10/30

7:45 pm-11:42 pm

1 stop4h 57m

$287

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Tue 9/1

1:18 pm-9:19 pm

1 stop7h 01m

Bozeman Gallatin Field

Thu 9/10

6:30 am-12:50 pm

1 stop7h 20m

$297

OntarioBozeman

ONT Ontario - BZN Bozeman Gallatin Field

ONTBZN

Ontario

Mon 8/31

5:00 am-1:24 pm

1 stop7h 24m

Bozeman Gallatin Field

Thu 9/10

4:32 pm-8:53 pm

1 stop5h 21m

$297

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 Ontario 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

What is the cheapest month to fly to Montana?

The cheapest month to fly to Montana from Ontario is in February. Flight prices, which tend to average around $294, are often lower during this time because this is during the off-season. The month of May is another great option to travel to Montana, with average flight prices from Ontario averaging around $341.

Cheap Ontario to Montana flight deals and tips

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

Fastest flight time	3h 46m
Direct flights	None

The fastest flight from Ontario to Montana takes 3h 46m

There are no direct flights from Ontario to Montana. There are no popular flight routes from Ontario to Montana.

Search flight deals

Frequently asked questions about flying from Ontario to Montana

When did momondo last update prices for flights from Ontario Airport to Montana?
Prices for flights from Ontario Airport to Montana were last updated today.
How many operators does momondo search for flights from Ontario Airport to Montana?
As of August 2026, there are 4 operators available to choose from for flights from Ontario Airport to Montana.
How old do you have to be to fly from Ontario Airport to Montana?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Montana.
What documentation or ID do you need to fly to Montana?
The travel and health documents required for your trip to Montana can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Montana. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Montana

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

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $182	Free Cancellation	Rating 7.9 12,803 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $211	Free Cancellation	Rating 7.4 10,112 reviews	Search United Airlines flights
Delta	PriceFrom $216	Free Cancellation	Rating 7.8 8,503 reviews	Search Delta flights
Southwest	PriceFrom $230	Free Cancellation	Rating 8.0 4,219 reviews	Search Southwest flights

Why use momondo?

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

Finding the right flight to Montana from Ontario 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 Montana quick and easy, saving you time and money.

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

All flight searches from Ontario to Montana on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Ontario to Montana 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 Ontario to Montana right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Montana flights. All you need is a valid email address and we will do the rest; it is that quick and easy.