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$101+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Dec 30 — Jan 61
Tue 12/30
Tue 1/6
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 November 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$173
(Kiwi.com)

One-way from

$101
(Trip.com)

Popular in

April

Cheapest in

September

Average price

$359
Provider with most accurate pricing for Bozeman Gallatin Field-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Los Angeles flights.
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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. 11% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1510:21 amMSO - ONT
1 stop11h 56mMultiple Airlines
Fri 12/196:00 amONT - MSO
1 stop5h 21mMultiple Airlines
Deal found 11/30$227
This Delta deal was found by Cheapflights users on 11/28. 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 12/306:16 pmBZN - ONT
1 stop6h 38mDelta
Thu 1/16:00 amONT - BZN
1 stop4h 17mDelta
Deal found 11/28$238
This Delta deal was found by Cheapflights users on 11/28. 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 12/46:33 pmBZN - ONT
1 stop6h 25mDelta
Sun 12/76:00 amONT - BZN
1 stop3h 50mDelta
Deal found 11/28$259
This United Airlines deal was found by Cheapflights users on 11/28. 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.
Mon 12/154:30 pmBZN - ONT
1 stop5h 12mUnited Airlines
Thu 12/185:05 amONT - BZN
1 stop7h 32mUnited Airlines
Deal found 11/28$281
This Alaska Airlines deal was found by Cheapflights users on 11/29. 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 12/174:22 pmMSO - ONT
1 stop18h 28mAlaska Airlines
Wed 12/246:05 pmONT - MSO
1 stop5h 04mAlaska Airlines
Deal found 11/29$290
This United Airlines deal was found by Cheapflights users on 11/28. 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.
Thu 12/114:07 pmBZN - ONT
1 stop7h 42mUnited Airlines
Fri 12/125:05 amONT - BZN
1 stop7h 30mUnited Airlines
Deal found 11/28$305
This United Airlines deal was found by Cheapflights users on 11/29. 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.
Sat 12/202:38 pmFCA - ONT
1 stop7h 29mUnited Airlines
Thu 1/15:05 amONT - FCA
1 stop7h 31mUnited Airlines
Deal found 11/29$335
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/191:11 pmMSO - ONT
1 stop4h 58mMultiple Airlines
Sun 1/46:37 pmONT - MSO
1 stop19h 53mMultiple Airlines
Deal found 11/30$335
This Delta deal was found by Cheapflights users on 11/29. 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 12/276:16 pmBZN - ONT
1 stop5h 12mDelta
Wed 12/316:00 amONT - BZN
1 stop4h 17mDelta
Deal found 11/29$338
This United Airlines deal was found by Cheapflights users on 11/28. 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 12/312:38 pmMSO - ONT
1 stop7h 29mUnited Airlines
Sun 1/45:05 amONT - MSO
1 stop7h 31mUnited Airlines
Deal found 11/28$359
This Alaska Airlines deal was found by Cheapflights users on 11/28. 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 12/184:21 pmMSO - ONT
1 stop8h 53mAlaska Airlines
Mon 12/2210:44 amONT - MSO
1 stop11h 58mAlaska Airlines
Deal found 11/28$369
This Delta deal was found by Cheapflights users on 11/28. 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 12/136:22 pmBIL - ONT
1 stop4h 33mDelta
Mon 12/154:49 pmONT - BIL
1 stop6h 34mDelta
Deal found 11/28$371

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 November 30, 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

3:05 pm-10:37 pm

1 stop8h 32m

Ontario

Sun 3/1

5:00 pm-11:15 pm

1 stop5h 15m

$217

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 1/15

6:30 pm-10:38 pm

1 stop5h 08m

Ontario

Sun 1/18

6:00 am-11:00 am

1 stop4h 00m

$217

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 2/27

6:25 pm-11:49 pm

1 stop6h 24m

Ontario

Sun 3/1

5:00 pm-11:15 pm

1 stop5h 15m

$217

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sat 2/28

3:05 pm-10:37 pm

1 stop8h 32m

Ontario

Tue 3/3

3:30 pm-10:25 pm

1 stop5h 55m

$217

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 2/27

6:25 pm-11:49 pm

1 stop6h 24m

Ontario

Mon 3/2

3:30 pm-10:25 pm

1 stop5h 55m

$217

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sat 2/28

3:05 pm-10:37 pm

1 stop8h 32m

Ontario

Mon 3/2

3:30 pm-10:25 pm

1 stop5h 55m

$217

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 2/27

6:25 pm-11:49 pm

1 stop6h 24m

Ontario

Tue 3/3

5:00 pm-11:15 pm

1 stop5h 15m

$217

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Sat 1/17

1:54 pm-8:36 pm

1 stop7h 42m

Ontario

Wed 1/21

11:53 am-7:06 pm

1 stop6h 13m

$224

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 12/30

6:16 pm-11:54 pm

1 stop6h 38m

Ontario

Thu 1/1

6:00 am-11:17 am

1 stop4h 17m

$238

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Thu 1/8

3:35 pm-8:10 pm

1 stop5h 35m

Ontario

Wed 1/14

4:03 pm-11:36 pm

1 stop6h 33m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/29

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, March is the cheapest month in which you can book a flight from Montana to Ontario (average of $45). Flying from Montana to Ontario in September is currently the most expensive (average of $229). 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 November 30, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 27% on flights from Montana to Ontario by exploring options for tickets in the evening.

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 7h 42m. Airlines will cover a distance of 999 mi. This flight may include one or multiple stops.

  • 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 Alaska Airlines ($105), United Airlines ($176), and Delta ($195).

  • 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 Kalispell Glacier Park - 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, March is the cheapest month in which you can book a flight from Montana to Ontario (average of $45). Flying from Montana to Ontario in September is currently the most expensive (average of $229). 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 November 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$203Average$349FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$227Average$321FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$229Average$352FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$232Average$446FlexibilityNo cancel feeOn-time69%

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