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$115+ 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 6/27. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Apr 11 — Apr 181
Sat 4/11
Sat 4/18
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 March 12, 2026.

This Delta deal was found by Cheapflights users on 3/11. 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 4/293:15 pm
BZN
-
ONT
1 stop27h 00m
Delta
Fri 5/85:50 pm
ONT
-
BZN
1 stop20h 24m
Delta
Deal found 3/11$225
This Delta deal was found by Cheapflights users on 3/9. 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 10/95:45 am
BZN
-
ONT
1 stop4h 22m
Delta
Sun 10/115:05 pm
ONT
-
BZN
1 stop6h 05m
Delta
Deal found 3/9$231
This Delta deal was found by Cheapflights users on 3/9. 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 5/225:13 am
FCA
-
ONT
1 stop4h 40m
Delta
Tue 5/266:00 am
ONT
-
FCA
1 stop4h 25m
Delta
Deal found 3/9$237
This Delta deal was found by Cheapflights users on 3/11. 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 4/297:18 am
BZN
-
ONT
1 stop10h 57m
Delta
Sun 5/36:00 am
ONT
-
BZN
1 stop4h 04m
Delta
Deal found 3/11$238
This Delta deal was found by Cheapflights users on 3/11. 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 4/76:30 pm
BZN
-
ONT
1 stop6h 21m
Delta
Thu 4/95:09 pm
ONT
-
BZN
1 stop5h 01m
Delta
Deal found 3/11$251
This Southwest deal was found by Cheapflights users on 3/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:10 pm
BZN
-
ONT
1 stop3h 55m
Southwest
Mon 4/66:30 pm
ONT
-
BZN
1 stop4h 40m
Southwest
Deal found 3/7$255
This Delta deal was found by Cheapflights users on 3/11. 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 5/13:15 pm
BZN
-
ONT
1 stop8h 22m
Delta
Mon 5/46:00 am
ONT
-
BZN
1 stop4h 04m
Delta
Deal found 3/11$262
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 4/256:22 pm
HLN
-
ONT
1 stop16h 23m
Alaska Airlines
Wed 4/2910:39 am
ONT
-
HLN
1 stop6h 06m
Alaska Airlines
Deal found 3/8$263
This Delta deal was found by Cheapflights users on 3/9. 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 5/26:20 pm
GTF
-
ONT
1 stop5h 23m
Delta
Tue 5/55:05 pm
ONT
-
GTF
1 stop4h 24m
Delta
Deal found 3/9$266
This Delta deal was found by Cheapflights users on 3/11. 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.
Sun 5/37:18 am
BZN
-
ONT
1 stop7h 21m
Delta
Tue 5/56:00 am
ONT
-
BZN
1 stop4h 04m
Delta
Deal found 3/11$275
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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 4/298:00 am
BZN
-
ONT
1 stop7h 32m
Alaska Airlines
Thu 5/77:59 pm
ONT
-
BZN
1 stop26h 59m
Alaska Airlines
Deal found 3/11$277
This Delta deal was found by Cheapflights users on 3/7. 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 4/76:21 pm
BIL
-
ONT
1 stop6h 30m
Delta
Wed 4/155:05 pm
ONT
-
BIL
1 stop4h 19m
Delta
Deal found 3/7$277

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 March 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$225
(Delta)

One-way from

$113
(Delta)

Popular in

May

Cheapest in

January

Average price

$329
Provider with most accurate pricing for Bozeman Gallatin Field-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Los Angeles 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. 3% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 12, 2026.
Use the filters below to find and compare flights from Montana to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Wed 4/29

7:18 am-1:39 pm

1 stop7h 21m

Ontario

Sat 5/9

6:45 am-3:14 pm

1 stop7h 29m

$225

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 3/31

1:50 pm-5:45 pm

1 stop4h 55m

Ontario

Wed 4/1

10:33 am-6:46 pm

1 stop7h 13m

$231

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Wed 4/22

6:34 pm-11:44 pm

1 stop6h 10m

Ontario

Sun 4/26

6:00 am-11:04 am

1 stop4h 04m

$231

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 4/14

4:04 pm-8:23 pm

1 stop5h 19m

Ontario

Thu 4/23

6:00 am-2:55 pm

1 stop7h 55m

$251

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 4/25

6:22 pm-9:45 am

1 stop16h 23m

Ontario

Wed 4/29

6:00 am-5:45 pm

1 stop10h 45m

$263
Quickest round-trip

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/2

6:20 pm-10:43 pm

1 stop5h 23m

Ontario

Tue 5/5

5:05 pm-10:29 pm

1 stop4h 24m

$266

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sat 4/25

7:00 am-2:32 pm

1 stop8h 32m

Ontario

Wed 4/29

7:00 am-1:26 pm

1 stop5h 26m

$277

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 4/7

6:21 pm-11:51 pm

1 stop6h 30m

Ontario

Wed 4/15

5:05 pm-10:24 pm

1 stop4h 19m

$277

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 5/2

1:08 pm-11:48 pm

1 stop11h 40m

Ontario

Tue 5/5

7:00 am-1:19 pm

1 stop5h 19m

$283

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 4/17

6:15 am-12:37 pm

1 stop7h 22m

Ontario

Wed 4/22

5:10 am-1:32 pm

1 stop7h 22m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, April is the cheapest month in which you can book a flight from Montana to Ontario (average of $98). 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 3h 55m. 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, Kalispell Glacier Park - 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, April is the cheapest month in which you can book a flight from Montana to Ontario (average of $98). 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 March 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$108Average$331FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$164Average$373FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$227Average$360FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$276Average$353FlexibilityNo cancel feeOn-time75%

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