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$99+ Cheap flights from Ontario (ONT) to Montana

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BZN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Ontario to Montana

Keep the following information in mind while searching for Ontario to Montana flight deals. Data was last updated September 17, 2025.

Round-trip from

$232
(KAYAK)

One-way from

$99
(Trip.com)

Popular in

November

Cheapest in

January

Average price

$359
From Ontario to Montana
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One-way flight from Ontario to Montana
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Highest demand for flights based on searches. 9% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Montana

Cheapest flights from Ontario to Montana
Explore the most affordable flight options available from Ontario to Montana. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Vliegwinkel deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amONT - BZN
1 stop7h 10mHawaiian Airlines
Mon 10/207:34 pmBZN - ONT
1 stop5h 29mHawaiian Airlines
Deal found 9/17$243
This Trip.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amONT - BZN
1 stop7h 10mHawaiian Airlines
Sun 10/197:34 pmBZN - ONT
1 stop5h 29mHawaiian Airlines
Deal found 9/15$246
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:20 amONT - BZN
1 stop4h 42mAlaska Airlines
Thu 10/308:00 amBZN - ONT
1 stop8h 17mAlaska Airlines
Deal found 9/16$248
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:35 amONT - BZN
1 stop5h 46mDelta
Thu 10/303:01 pmBZN - ONT
1 stop8h 40mDelta
Deal found 9/15$249
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/286:00 amONT - MSO
1 stop5h 19mHawaiian Airlines
Wed 11/51:59 pmMSO - ONT
1 stop7h 54mHawaiian Airlines
Deal found 9/15$260
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amONT - BZN
1 stop7h 10mAlaska Airlines
Sun 10/197:34 pmBZN - ONT
1 stop5h 29mAlaska Airlines
Deal found 9/15$260
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:00 amONT - BZN
1 stop3h 44mDelta
Mon 10/205:35 amBZN - ONT
1 stop4h 30mDelta
Deal found 9/14$261
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:00 amONT - FCA
1 stop4h 26mDelta
Tue 12/26:06 pmFCA - ONT
1 stop6h 53mDelta
Deal found 9/16$261
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:35 pmONT - BIL
1 stop4h 50mDelta
Wed 10/226:15 pmBIL - ONT
1 stop6h 24mDelta
Deal found 9/16$261
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amONT - BZN
1 stop3h 44mDelta
Mon 10/206:20 pmBZN - ONT
1 stop6h 19mDelta
Deal found 9/16$262
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:48 amONT - MSO
2 stops11h 29mDelta
Wed 11/56:20 pmMSO - ONT
1 stop4h 00mDelta
Deal found 9/15$266
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:53 pmONT - BIL
2 stops7h 53mUnited Airlines
Wed 10/227:00 amBIL - ONT
1 stop6h 51mUnited Airlines
Deal found 9/16$266

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Montana 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, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Ontario to Montana that are best for you.

Fly from

Ontario

Fly to

Montana

Route

Depart

Return

Price

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 10/16

6:00 am-2:10 pm

1 stop7h 10m

Bozeman Gallatin Field

Mon 10/20

7:34 pm-12:03 am

1 stop5h 29m

$243

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 10/16

6:00 am-2:10 pm

1 stop7h 10m

Bozeman Gallatin Field

Sun 10/19

7:34 pm-12:03 am

1 stop5h 29m

$246

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Sat 11/8

4:11 pm-10:39 pm

1 stop5h 28m

Bozeman Gallatin Field

Tue 11/11

8:00 am-3:17 pm

1 stop8h 17m

$248

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Fri 11/14

6:00 am-2:08 pm

1 stop7h 08m

Bozeman Gallatin Field

Tue 11/18

3:02 pm-8:53 pm

1 stop6h 51m

$248

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 10/15

7:43 pm-12:18 pm

1 stop15h 35m

Missoula Johnson-Bell Field

Wed 11/5

1:59 pm-8:53 pm

1 stop7h 54m

$260

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 10/16

6:00 am-2:10 pm

1 stop7h 10m

Bozeman Gallatin Field

Sun 10/19

7:34 pm-12:03 am

1 stop5h 29m

$260

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 11/17

6:03 pm-12:13 am

1 stop5h 10m

Missoula Johnson-Bell Field

Mon 12/8

4:22 pm-11:29 pm

1 stop8h 07m

$260

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 10/28

6:00 am-12:19 pm

1 stop5h 19m

Missoula Johnson-Bell Field

Wed 11/5

1:59 pm-8:53 pm

1 stop7h 54m

$260

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 11/10

6:03 pm-12:13 am

1 stop5h 10m

Missoula Johnson-Bell Field

Mon 11/17

1:59 pm-8:53 pm

1 stop7h 54m

$260

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Mon 11/3

6:00 am-2:08 pm

1 stop7h 08m

Bozeman Gallatin Field

Mon 11/10

8:00 am-3:17 pm

1 stop8h 17m

$260

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Montana

Have a flexible travel schedule? Discover the best time to fly to Montana from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Montana

What is the cheapest month to book a flight from Ontario to Montana?

Currently, October is the cheapest month in which you can book a flight from Ontario to Montana (average of $371). Flying from Ontario to Montana in May is currently the most expensive (average of $476). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to MT?

Find hourly flight availability from Ontario to Montana. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Montana as you normally would.

Reviews of airlines servicing Montana

Get insights into the airlines that provide service to Montana. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Montana. Reviews last updated September 17, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Ontario to Montana have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Montana. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Montana?

    For a flight from Ontario to Montana, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

  • How long is the flight from Ontario to Montana?

    A quick flight from Ontario to Montana can take about 4h 26m. Hawaiian Airlines provides one of the quickest options available for as low as $261. Airlines will cover a distance of 999 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ontario to Montana one-way?

    One-way options have recently been found by users for as low as $118 on Hawaiian Airlines. Other airlines that offer cheap prices include Alaska Airlines from $130 and Delta from $200 one-way.

  • What are the most popular routes from Ontario to Montana?

    When deciding which route to take from Ontario to Montana consider Ontario - Bozeman Gallatin Field, Ontario - Missoula Johnson-Bell Field or Ontario - Kalispell Glacier Park as they are the most popular.

  • Can I find deals for flights from Ontario to Montana that include hotel bookings?

    Yes. In addition to deals on Ontario to Montana flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Montana?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Montana.

  • Can I find deals for business class flights from Ontario to Montana?

    Yes. Cheapflights offers flight deals from Ontario to Montana by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Montana?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Montana (average of $371). Flying from Ontario to Montana in May is currently the most expensive (average of $476). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Ontario to Montana

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Montana

Discover the top 4 airlines that operate flights from Ontario to Montana. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$178Average$371FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$189Average$408FlexibilityNo cancel feeOn-time69%
DeltaCheapest$198Average$333FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$236Average$376FlexibilityNo cancel feeOn-time63%

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