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$106+ 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Feb 22 — Mar 11
Sun 2/22
Sun 3/1
1 adult, Economy
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Cheap 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 January 23, 2026.

This United Airlines deal was found by Cheapflights users on 1/21. 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 2/54:16 pm
BZN
-
ONT
1 stop5h 42m
United Airlines
Mon 2/96:00 am
ONT
-
BZN
1 stop7h 43m
United Airlines
Deal found 1/21$211
This Delta deal was found by Cheapflights users on 1/21. 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 3/275:56 pm
FCA
-
ONT
1 stop6h 55m
Delta
Sat 4/46:00 am
ONT
-
FCA
1 stop4h 21m
Delta
Deal found 1/21$217
This Delta deal was found by Cheapflights users on 1/21. 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 2/186:10 pm
MSO
-
ONT
1 stop6h 39m
Delta
Tue 2/246:00 am
ONT
-
MSO
1 stop5h 26m
Delta
Deal found 1/21$217
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 2/51:46 pm
BZN
-
ONT
1 stop6h 30m
Alaska Airlines
Sun 2/86:00 am
ONT
-
BZN
1 stop7h 09m
Alaska Airlines
Deal found 1/21$231
This Alaska Airlines deal was found by Cheapflights users on 1/22. 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 2/277:00 am
BZN
-
ONT
1 stop17h 32m
Alaska Airlines
Sat 2/286:14 am
ONT
-
BZN
1 stop6h 54m
Alaska Airlines
Deal found 1/22$238
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 4/301:43 pm
FCA
-
ONT
1 stop6h 22m
Alaska Airlines
Mon 5/410:39 am
ONT
-
FCA
1 stop7h 09m
Alaska Airlines
Deal found 1/21$239
This Delta deal was found by Cheapflights users on 1/21. 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 2/186:10 pm
MSO
-
ONT
1 stop6h 39m
Delta
Mon 2/236:00 am
ONT
-
MSO
1 stop5h 26m
Delta
Deal found 1/21$239
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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.
Sun 2/81:46 pm
BZN
-
ONT
1 stop6h 30m
Alaska Airlines
Wed 2/117:00 am
ONT
-
BZN
1 stop5h 06m
Alaska Airlines
Deal found 1/21$242
This Kiwi.com deal was found by Cheapflights users on 1/23. 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 2/95:18 pm
GTF
-
ONT
1 stop21h 34m
Multiple Airlines
Thu 2/123:24 pm
ONT
-
GTF
1 stop17h 28m
Multiple Airlines
Deal found 1/23$249
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 2/191:48 pm
BZN
-
ONT
1 stop6h 09m
Alaska Airlines
Fri 3/67:00 am
ONT
-
BZN
1 stop5h 08m
Alaska Airlines
Deal found 1/21$251
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 5/46:35 am
FCA
-
ONT
1 stop28h 10m
Alaska Airlines
Fri 5/87:59 pm
ONT
-
FCA
1 stop21h 49m
Alaska Airlines
Deal found 1/21$255
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 4/303:55 pm
MSO
-
ONT
1 stop23h 37m
Alaska Airlines
Fri 5/87:59 pm
ONT
-
MSO
1 stop15h 29m
Alaska Airlines
Deal found 1/21$255

Find flight deals from Montana to Ontario

Keep the following information in mind while searching for Montana to Ontario flight deals. Data was last updated January 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$211
(United Airlines)

One-way from

$106
(Alaska Airlines)

Popular in

March

Cheapest in

September

Average price

$333
Provider with most accurate pricing for Bozeman Gallatin Field-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Los Angeles flights.
Search Deals
From Montana to Ontario
Search Deals
One-way flight from Montana to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 23, 2026.
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 2/5

4:16 pm-8:58 pm

1 stop5h 42m

Ontario

Mon 2/9

6:00 am-2:43 pm

1 stop7h 43m

$211

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 2/18

6:10 pm-11:49 pm

1 stop6h 39m

Ontario

Wed 2/25

5:00 pm-11:30 pm

1 stop5h 30m

$217

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 3/28

6:04 pm-10:48 pm

1 stop5h 44m

Ontario

Sat 4/4

5:45 pm-11:18 pm

1 stop4h 33m

$217

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 2/18

6:10 pm-11:49 pm

1 stop6h 39m

Ontario

Tue 2/24

6:00 am-12:26 pm

1 stop5h 26m

$217

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 2/5

1:46 pm-7:16 pm

1 stop6h 30m

Ontario

Sun 2/8

6:00 am-2:09 pm

1 stop7h 09m

$231

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 2/27

7:00 am-11:32 pm

1 stop17h 32m

Ontario

Sat 2/28

6:14 am-2:08 pm

1 stop6h 54m

$238

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 4/30

1:43 pm-7:05 pm

1 stop6h 22m

Ontario

Mon 5/4

10:39 am-6:48 pm

1 stop7h 09m

$239

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 5/1

1:43 pm-7:05 pm

1 stop6h 22m

Ontario

Tue 5/5

6:00 am-12:03 pm

1 stop5h 03m

$239

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 2/18

6:10 pm-11:49 pm

1 stop6h 39m

Ontario

Mon 2/23

6:00 am-12:26 pm

1 stop5h 26m

$239

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 5/1

7:28 pm-11:59 pm

1 stop5h 31m

Ontario

Wed 5/6

3:26 pm-11:51 pm

1 stop7h 25m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

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.

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 5h 42m. Airlines will cover a distance of 877 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 Delta ($118), Southwest ($136), and Alaska Airlines ($144).

  • 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, Kalispell Glacier Park - 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, 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 January 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$160Average$349FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$227Average$321FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$241Average$376FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$276Average$353FlexibilityNo cancel feeOn-time75%

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