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$112+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$225
(SmartFares)

One-way from

$112
(TeaFlight)

Popular in

April

Cheapest in

September

Average price

$382
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. 6% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 18, 2025.

This SmartFares deal was found by Cheapflights users on 8/17. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:26 amBZN - ONT
1 stop8h 21mAlaska Airlines
Sun 9/146:00 amONT - BZN
1 stop7h 14mAlaska Airlines
Deal found 8/17$225
This Vliegwinkel deal was found by Cheapflights users on 8/17. 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 9/1111:26 amBZN - ONT
1 stop8h 21mHawaiian Airlines
Sun 9/146:00 amONT - BZN
1 stop7h 14mHawaiian Airlines
Deal found 8/17$226
This Alaska Airlines deal was found by Cheapflights users on 8/15. 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.
Tue 12/911:30 amBZN - ONT
1 stop7h 47mAlaska Airlines
Tue 12/166:00 pmONT - BZN
1 stop4h 58mAlaska Airlines
Deal found 8/15$237
This Alaska Airlines deal was found by Cheapflights users on 8/16. 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.
Sat 10/47:34 pmBZN - ONT
1 stop5h 29mAlaska Airlines
Tue 10/76:00 amONT - BZN
1 stop7h 10mAlaska Airlines
Deal found 8/16$239
This Hawaiian Airlines deal was found by Cheapflights users on 8/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:35 pmFCA - ONT
1 stop6h 28mHawaiian Airlines
Mon 11/36:00 amONT - FCA
1 stop5h 24mHawaiian Airlines
Deal found 8/16$240
This Alaska Airlines deal was found by Cheapflights users on 8/16. 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.
Mon 9/157:23 pmBZN - ONT
1 stop5h 40mAlaska Airlines
Mon 9/226:00 amONT - BZN
1 stop7h 14mAlaska Airlines
Deal found 8/16$240
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:00 amBIL - ONT
1 stop6h 19mAlaska Airlines
Tue 12/167:10 amONT - BIL
1 stop5h 12mAlaska Airlines
Deal found 8/17$240
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:40 pmMSO - ONT
1 stop17h 04mAlaska Airlines
Mon 9/223:06 pmONT - MSO
1 stop8h 21mAlaska Airlines
Deal found 8/17$240
This Delta deal was found by Cheapflights users on 8/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:20 amFCA - ONT
1 stop4h 35mDelta
Sun 9/146:00 amONT - FCA
1 stop4h 14mDelta
Deal found 8/17$241
This Delta deal was found by Cheapflights users on 8/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:30 pmBZN - ONT
1 stop6h 11mDelta
Mon 10/136:00 amONT - BZN
1 stop3h 44mDelta
Deal found 8/17$241
This Delta deal was found by Cheapflights users on 8/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:59 pmBIL - ONT
1 stop6h 47mDelta
Sun 12/145:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 8/17$241
This Delta deal was found by Cheapflights users on 8/15. 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.
Fri 9/125:30 amMSO - ONT
1 stop4h 27mDelta
Mon 9/159:50 amONT - MSO
1 stop6h 50mDelta
Deal found 8/15$241

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 August 18, 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

Thu 9/11

11:26 am-6:47 pm

1 stop8h 21m

Ontario

Sun 9/14

6:00 am-2:14 pm

1 stop7h 14m

$225

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 9/11

11:26 am-6:47 pm

1 stop8h 21m

Ontario

Sun 9/14

6:00 am-2:14 pm

1 stop7h 14m

$226

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 12/9

11:30 am-6:17 pm

1 stop7h 47m

Ontario

Tue 12/16

6:00 pm-11:58 pm

1 stop4h 58m

$237

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Wed 10/29

3:02 pm-8:53 pm

1 stop6h 51m

Ontario

Sat 11/1

7:20 am-1:02 pm

1 stop4h 42m

$239

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sat 10/4

7:34 pm-12:03 am

1 stop5h 29m

Ontario

Tue 10/7

6:00 am-2:10 pm

1 stop7h 10m

$239

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 10/16

6:35 pm-12:03 am

1 stop6h 28m

Ontario

Mon 11/3

6:00 am-12:24 pm

1 stop5h 24m

$240

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Mon 9/15

7:23 pm-12:03 am

1 stop5h 40m

Ontario

Mon 9/22

6:00 am-2:14 pm

1 stop7h 14m

$240

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sun 2/1

3:25 pm-10:37 pm

1 stop8h 12m

Ontario

Sat 2/7

4:05 pm-10:48 pm

1 stop5h 43m

$240

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Mon 10/20

8:00 am-12:37 pm

1 stop5h 37m

Ontario

Sun 10/26

6:00 am-2:08 pm

1 stop7h 08m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 12/10

3:36 pm-8:03 pm

1 stop5h 27m

Ontario

Tue 12/16

6:00 am-2:56 pm

1 stop7h 56m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

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 $328). 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 August 18, 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.

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

    The cheapest airlines for a one-way flight from Montana to Ontario are Hawaiian Airlines ($112), Delta ($119), and Alaska Airlines ($120).

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

    When deciding which route to take from Montana to Ontario consider Billings Logan Intl - Ontario, Bozeman Gallatin Field - Ontario or Missoula Johnson-Bell Field - 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 $328). 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$82Average$356FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$232Average$472FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$343FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$256Average$350FlexibilityNo cancel feeOn-time63%

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