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$119+ Cheap flights from Ontario (ONT) to Montana

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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BZN
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Ontario to Montana

Keep the following information in mind while searching for Ontario to Montana flight deals. Data was last updated May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$242
(Delta)

One-way from

$119
(Hawaiian Airlines)

Popular in

November

Cheapest in

January

Average price

$389
Provider with most accurate pricing for Los Angeles-Bozeman Gallatin Field flight deals.
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From Ontario to Montana
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One-way flight from Ontario to Montana
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Highest demand for flights based on searches. 10% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Ontario to Montana

Cheapest flights from Ontario to Montana
Explore the most affordable flight options available from Ontario to Montana. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This Delta deal was found by Cheapflights users on 4/29. 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.
Tue 5/2710:01 amONT - WYS
1 stop3h 36mDelta
Mon 6/212:53 pmWYS - ONT
2 stops10h 42mDelta
Deal found 4/29$242
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 5/206:00 amONT - BZN
1 stop5h 32mAlaska Airlines
Wed 6/43:59 pmBZN - ONT
1 stop7h 47mAlaska Airlines
Deal found 4/29$244
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/214:45 pmONT - MSO
1 stop5h 51mHawaiian Airlines
Mon 5/266:42 amMSO - ONT
1 stop5h 15mHawaiian Airlines
Deal found 4/29$251
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:00 amONT - FCA
1 stop4h 13mDelta
Sun 6/15:25 amFCA - ONT
1 stop4h 46mDelta
Deal found 4/30$252
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/311:44 amONT - BZN
2 stops11h 20mDelta
Fri 6/65:40 amBZN - ONT
1 stop4h 31mDelta
Deal found 4/30$260
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/296:00 amONT - MSO
1 stop5h 13mAlaska Airlines
Sun 6/16:42 amMSO - ONT
1 stop5h 15mAlaska Airlines
Deal found 4/30$264
This Gotogate deal was found by Cheapflights users on 4/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/55:21 pmONT - MSO
1 stop17h 34mFrontier
Mon 6/912:40 pmMSO - ONT
1 stop12h 10mFrontier
Deal found 4/30$266
This Hawaiian Airlines deal was found by Cheapflights users on 4/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/34:45 pmONT - BIL
1 stop6h 14mHawaiian Airlines
Wed 7/97:17 pmBIL - ONT
1 stop5h 56mHawaiian Airlines
Deal found 4/30$267
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/54:57 pmONT - MSO
1 stop6h 24mDelta
Mon 6/91:08 pmMSO - ONT
2 stops10h 38mDelta
Deal found 4/30$270
This Hawaiian Airlines deal was found by Cheapflights users on 4/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/267:10 amONT - BZN
1 stop5h 04mHawaiian Airlines
Sat 8/3011:26 amBZN - ONT
1 stop8h 02mHawaiian Airlines
Deal found 4/30$270
This Southwest deal was found by Cheapflights users on 4/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/263:45 pmONT - BZN
1 stop6h 40mSouthwest
Wed 7/304:15 pmBZN - ONT
2 stops6h 50mSouthwest
Deal found 4/29$286
This Hawaiian Airlines deal was found by Cheapflights users on 4/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2211:51 amONT - FCA
1 stop5h 01mHawaiian Airlines
Sun 5/256:44 amFCA - ONT
1 stop5h 13mHawaiian Airlines
Deal found 4/30$297

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Montana 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 May 1, 2025.
Use the filters below to find and compare flights from Ontario to Montana that are best for you.

Fly from

Ontario

Fly to

Montana

Route

Depart

Return

Price

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Tue 5/27

10:01 am-2:37 pm

1 stop3h 36m

West Yellowstone

Mon 6/2

12:53 pm-10:35 pm

2 stops10h 42m

$242

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Tue 5/20

6:00 am-12:32 pm

1 stop5h 32m

Bozeman Gallatin Field

Wed 6/4

3:59 pm-10:46 pm

1 stop7h 47m

$244

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 5/21

4:45 pm-11:36 pm

1 stop5h 51m

Missoula Johnson-Bell Field

Mon 5/26

6:42 am-10:57 am

1 stop5h 15m

$251

OntarioKalispell

ONT - FCA

ONTFCA

Ontario

Wed 5/28

6:00 am-11:13 am

1 stop4h 13m

Kalispell Glacier Park

Sun 6/1

5:25 am-9:11 am

1 stop4h 46m

$252

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Tue 6/3

11:44 am-12:04 am

2 stops11h 20m

Bozeman Gallatin Field

Fri 6/6

5:40 am-9:11 am

1 stop4h 31m

$260

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 5/29

6:00 am-12:13 pm

1 stop5h 13m

Missoula Johnson-Bell Field

Sun 6/1

6:42 am-10:57 am

1 stop5h 15m

$264

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 6/5

5:21 pm-11:55 am

1 stop17h 34m

Missoula Johnson-Bell Field

Mon 6/9

12:40 pm-11:50 pm

1 stop12h 10m

$266

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 6/3

4:45 pm-11:59 pm

1 stop6h 14m

Billings Logan Intl

Wed 7/9

7:17 pm-12:13 am

1 stop5h 56m

$267

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Tue 8/26

7:10 am-1:14 pm

1 stop5h 04m

Bozeman Gallatin Field

Sat 8/30

11:26 am-6:28 pm

1 stop8h 02m

$270

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 6/5

4:57 pm-12:21 am

1 stop6h 24m

Missoula Johnson-Bell Field

Mon 6/9

1:08 pm-10:46 pm

2 stops10h 38m

$270

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 53 results
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Best time to book a flight from Ontario to Montana

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Montana (average of $371). Flying from Ontario to Montana in June is currently the most expensive (average of $510). 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 ONT to MT?

Find hourly flight availability from Ontario to Montana. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Montana as you normally would.

Rainfall in Montana by month

Plan your trip to Montana by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Montana ranges from 0.4 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Montana when rainfall is around 0.4 in.

Temperature in Montana by month

Plan your trip to Montana by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Montana, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

Reviews of airlines servicing Montana

Get insights into the airlines that provide service to Montana. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Montana. Reviews last updated May 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Ontario to Montana. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,409 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

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

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

    One-way options have recently been found by users for as low as $119 on Hawaiian Airlines. Other airlines that offer cheap prices include Delta from $123 and Alaska Airlines from $135 one-way.

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

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

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Ontario to Montana (average of $371). Flying from Ontario to Montana in June is currently the most expensive (average of $510). 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 Ontario to Montana

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Montana

Discover the top 5 airlines that operate flights from Ontario to Montana. 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$168Average$254FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$219Average$402FlexibilityNo cancel feeOn-time75%
DeltaCheapest$229Average$405FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$250Average$463FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$274Average$395FlexibilityNo cancel feeOn-time63%

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