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$94+ Cheap flights from Montana to Ontario (ONT)

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Nov 2 — Nov 91
Sun 11/2
Sun 11/9
1 adult, Economy
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Cheap flight deals from Montana to Ontario

Keep the following information in mind while searching for Montana to Ontario flight deals. Data was last updated October 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$189
(Hawaiian Airlines)

One-way from

$94
(Alaska Airlines)

Popular in

April

Cheapest in

September

Average price

$338
Provider with most accurate pricing for Bozeman Gallatin Field-Los Angeles flight deals.
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From Montana to Ontario
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One-way flight from Montana to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Montana to Ontario

Cheapest flights from Montana to Ontario
Explore the most affordable flight options available from Montana to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 3, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/1. 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.
Wed 11/1211:16 amBZN - ONT
1 stop10h 37mAlaska Airlines
Fri 11/144:11 pmONT - BZN
1 stop5h 28mAlaska Airlines
Deal found 10/1$189
This Trip.com deal was found by Cheapflights users on 10/2. 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.
Fri 10/311:06 pmFCA - ONT
1 stop4h 57mHawaiian Airlines
Tue 11/46:00 amONT - FCA
1 stop5h 24mHawaiian Airlines
Deal found 10/2$193
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 10/217:34 pmBZN - ONT
1 stop5h 29mAlaska Airlines
Sat 10/257:10 amONT - BZN
1 stop4h 52mAlaska Airlines
Deal found 10/1$199
This KAYAK deal was found by Cheapflights users on 10/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:46 amBZN - ONT
1 stop7h 47mAlaska Airlines
Thu 12/116:00 amONT - BZN
1 stop7h 04mAlaska Airlines
Deal found 10/1$200
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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.
Fri 11/141:06 pmFCA - ONT
1 stop5h 03mAlaska Airlines
Mon 11/177:20 amONT - FCA
1 stop5h 07mAlaska Airlines
Deal found 10/2$210
This KAYAK deal was found by Cheapflights users on 10/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/171:06 pmFCA - ONT
1 stop5h 03mAlaska Airlines
Wed 11/194:11 pmONT - FCA
1 stop6h 46mAlaska Airlines
Deal found 10/1$214
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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 11/113:02 pmBZN - ONT
1 stop6h 51mAlaska Airlines
Thu 11/136:00 amONT - BZN
1 stop7h 08mAlaska Airlines
Deal found 10/2$230
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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 11/136:33 amFCA - ONT
1 stop5h 32mAlaska Airlines
Sun 11/167:20 amONT - FCA
1 stop5h 07mAlaska Airlines
Deal found 10/2$235
This Delta deal was found by Cheapflights users on 10/2. 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 10/246:10 pmFCA - ONT
1 stop6h 29mDelta
Mon 10/274:35 pmONT - FCA
1 stop5h 34mDelta
Deal found 10/2$237
This Delta deal was found by Cheapflights users on 10/3. 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 10/245:35 amBZN - ONT
1 stop4h 30mDelta
Sun 10/266:00 amONT - BZN
1 stop3h 44mDelta
Deal found 10/3$237
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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.
Sat 11/18:00 amBZN - ONT
1 stop8h 17mAlaska Airlines
Mon 11/36:00 amONT - BZN
1 stop7h 08mAlaska Airlines
Deal found 10/1$251
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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 10/285:30 amMSO - ONT
1 stop5h 28mAlaska Airlines
Wed 10/295:50 pmONT - MSO
1 stop5h 23mAlaska Airlines
Deal found 10/2$260

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montana to Ontario 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 October 3, 2025.
Use the filters below to find and compare flights from Montana to Ontario that are best for you.

Fly from

Montana

Fly to

Ontario

Route

Depart

Return

Price

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sat 2/28

3:25 pm-10:37 pm

1 stop8h 12m

Ontario

Tue 3/3

6:00 am-2:25 pm

1 stop7h 25m

$189

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Wed 11/12

11:16 am-8:53 pm

1 stop10h 37m

Ontario

Fri 11/14

4:11 pm-10:39 pm

1 stop5h 28m

$189

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 10/31

1:06 pm-5:03 pm

1 stop4h 57m

Ontario

Tue 11/4

6:00 am-12:24 pm

1 stop5h 24m

$193

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 10/21

7:34 pm-12:03 am

1 stop5h 29m

Ontario

Sat 10/25

7:10 am-1:02 pm

1 stop4h 52m

$199

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 11/14

1:06 pm-5:09 pm

1 stop5h 03m

Ontario

Sun 11/16

7:20 am-1:27 pm

1 stop5h 07m

$210

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 11/14

1:06 pm-5:09 pm

1 stop5h 03m

Ontario

Mon 11/17

7:20 am-1:27 pm

1 stop5h 07m

$210

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Mon 11/17

1:06 pm-5:09 pm

1 stop5h 03m

Ontario

Wed 11/19

4:11 pm-11:57 pm

1 stop6h 46m

$214

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 11/11

3:02 pm-8:53 pm

1 stop6h 51m

Ontario

Thu 11/13

6:00 am-2:08 pm

1 stop7h 08m

$230

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sat 11/22

7:59 pm-9:55 am

1 stop14h 56m

Ontario

Wed 12/3

12:13 pm-11:17 pm

1 stop10h 04m

$230

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 11/13

6:33 am-11:05 am

1 stop5h 32m

Ontario

Mon 11/17

7:20 am-1:27 pm

1 stop5h 07m

$235

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/30

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from Montana 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 Montana to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Montana to Ontario (average of $246). Flying from Montana to Ontario in March is currently the most expensive (average of $327). 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 MT to ONT?

Find hourly flight availability from Montana to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 3, 2025.

When flying from Montana to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Montana to Ontario. 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 into for flights to Ontario from Montana?

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

  • How long is the flight from Montana to Ontario?

    Departing from Montana to Ontario will take you 8h 12m. Airlines will cover a distance of 877 mi. This flight may include one or multiple stops.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montana to Ontario 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 Montana to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Montana to Ontario (average of $246). Flying from Montana to Ontario in March is currently the most expensive (average of $327). 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.

See more FAQs

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Alternative routes for Montana to Ontario

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

Discover the top 4 airlines that operate flights from Montana to Ontario. 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 October 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$229Average$345FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$232Average$472FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$340FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$256Average$321FlexibilityNo cancel feeOn-time63%

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