HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$118+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Montana to Ontario with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Montana to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Montana (USMT) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$307
(United Airlines)

One-way from

$118
(Alaska Airlines)

Popular in

November

Cheapest in

February

Average price

$298
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. 11% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2025
Search Deals

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 January 30, 2025.

This United Airlines deal was found by Cheapflights users on 1/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/204:26 pmBZN - ONT
1 stop5h 26mUnited Airlines
Mon 3/36:00 amONT - BZN
1 stop7h 40mUnited Airlines
Deal found 1/30$307
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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.
Mon 3/2411:24 amBZN - ONT
1 stop7h 59mAlaska Airlines
Fri 3/286:00 amONT - BZN
1 stop6h 59mAlaska Airlines
Deal found 1/30$312
This Delta deal was found by Cheapflights users on 1/29. 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.
Mon 3/311:55 amGTF - ONT
1 stop5h 33mDelta
Fri 3/75:10 pmONT - GTF
1 stop4h 30mDelta
Deal found 1/29$318
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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.
Sat 5/33:47 pmBIL - ONT
1 stop5h 32mAlaska Airlines
Wed 5/77:00 amONT - BIL
1 stop7h 07mAlaska Airlines
Deal found 1/30$325
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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.
Fri 3/76:38 pmMSO - ONT
1 stop5h 46mAlaska Airlines
Tue 3/116:00 amONT - MSO
1 stop6h 40mAlaska Airlines
Deal found 1/30$328
This Delta deal was found by Cheapflights users on 1/30. 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.
Fri 2/2111:40 amBIL - ONT
1 stop5h 48mDelta
Sat 2/226:00 amONT - BIL
1 stop4h 00mDelta
Deal found 1/30$329
This Delta deal was found by Cheapflights users on 1/30. 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.
Sun 3/912:00 pmMSO - ONT
1 stop5h 34mDelta
Mon 3/176:00 amONT - MSO
1 stop4h 20mDelta
Deal found 1/30$329
This Delta deal was found by Cheapflights users on 1/30. 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 6/35:25 amFCA - ONT
1 stop4h 40mDelta
Wed 6/115:05 pmONT - FCA
1 stop4h 54mDelta
Deal found 1/30$340
This Delta deal was found by Cheapflights users on 1/29. 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 6/105:45 amHLN - ONT
1 stop4h 13mDelta
Tue 6/246:00 amONT - HLN
1 stop5h 35mDelta
Deal found 1/29$340
This United deal was found by Cheapflights users on 1/30. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/48:41 amCOD - ONT
2 stops12h 59mUnited Airlines
Sat 3/85:05 amONT - COD
1 stop7h 04mUnited Airlines
Deal found 1/30$344
This Delta deal was found by Cheapflights users on 1/30. 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.
Sat 2/226:41 pmBZN - ONT
1 stop5h 45mDelta
Sun 3/96:00 amONT - BZN
1 stop5h 25mDelta
Deal found 1/30$349
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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.
Tue 6/36:32 pmFCA - ONT
1 stop5h 09mAlaska Airlines
Sat 6/74:43 pmONT - FCA
1 stop6h 15mAlaska Airlines
Deal found 1/30$353

Find flights from Montana to Ontario within your budget

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 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 2/20

4:26 pm-8:52 pm

1 stop5h 26m

Ontario

Tue 3/4

1:44 pm-9:29 pm

1 stop6h 45m

$307

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Mon 3/24

11:24 am-6:23 pm

1 stop7h 59m

Ontario

Fri 3/28

6:00 am-1:59 pm

1 stop6h 59m

$312

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 3/3

11:55 am-4:28 pm

1 stop5h 33m

Ontario

Fri 3/7

5:10 pm-10:40 pm

1 stop4h 30m

$318

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sat 5/3

3:47 pm-8:19 pm

1 stop5h 32m

Ontario

Wed 5/7

7:00 am-3:07 pm

1 stop7h 07m

$325

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 3/7

6:38 pm-11:24 pm

1 stop5h 46m

Ontario

Tue 3/11

6:00 am-1:40 pm

1 stop6h 40m

$328

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 2/21

11:40 am-4:28 pm

1 stop5h 48m

Ontario

Sat 2/22

6:00 am-11:00 am

1 stop4h 00m

$329

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sun 3/9

12:00 pm-4:34 pm

1 stop5h 34m

Ontario

Mon 3/17

6:00 am-11:20 am

1 stop4h 20m

$329

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Tue 6/3

5:25 am-9:05 am

1 stop4h 40m

Ontario

Wed 6/11

5:05 pm-10:59 pm

1 stop4h 54m

$340

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 6/10

5:45 am-8:58 am

1 stop4h 13m

Ontario

Tue 6/24

6:00 am-12:35 pm

1 stop5h 35m

$340

CodyOntario

COD - ONT

CODONT

Cody E.E. Faust

Tue 3/4

8:41 am-8:40 pm

2 stops12h 59m

Ontario

Sat 3/8

5:05 am-1:09 pm

1 stop7h 04m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 36 results
1
2
3
4

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.

Travel insights for flights from Montana to Ontario

Get recent, data-driven insights about flights from Montana to Ontario including ideal travel times, pricing trends, and more.

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 $310). 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 January 30, 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.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated January 30, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Montana to Ontario to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Entertainment

7.7

Food

7.1

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Entertainment

7.7

Food

7.1

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Entertainment

7.7

Food

7.1

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Entertainment

7.7

Food

7.1

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Entertainment

7.7

Food

7.1

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,585 reviews

Boarding

8.2

Entertainment

7.7

Food

7.1

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

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 Alaska Airlines ($118), United Airlines ($154), and Delta ($175).

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

    When deciding which route to take from Montana to Ontario consider Kalispell Glacier Park - 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 $310). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Montana to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Las Vegas flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
Newark to Las Vegas flights
Newark to Los Angeles flights
John F Kennedy Intl to San Francisco flights
Minneapolis to Las Vegas flights
Seattle to Las Vegas flights
San Francisco to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Dulles Intl to Las Vegas flights
Denver to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to Las Vegas flights
LaGuardia to Las Vegas flights
Seattle to Los Angeles flights
Detroit to Las Vegas flights
LaGuardia to Los Angeles flights
Atlanta to Las Vegas flights
Seattle to San Diego flights
Boston to Las Vegas flights
Newark to San Francisco flights
Santa Ana to Las Vegas flights
Los Angeles to San Francisco flights
Seattle to Santa Ana flights
Seattle to San Francisco flights
Midway to Las Vegas flights
Philadelphia to Las Vegas flights
Reagan-National to Los Angeles flights
O'Hare Intl to San Francisco flights
Hobby to Las Vegas flights
Burbank to Las Vegas flights
Baltimore to Los Angeles flights
San Jose to Las Vegas flights
Boston to Los Angeles flights
Los Angeles to Oakland flights
O'Hare Intl to Los Angeles flights
Dallas/Fort Worth to San Francisco flights
Reagan-National to Las Vegas flights
Portland to Los Angeles flights
Baltimore to Las Vegas flights
Fort Lauderdale to Las Vegas flights
Oakland to Las Vegas flights
Orlando to Las Vegas flights
San Jose to Los Angeles flights
Los Angeles to San Jose flights
Newark to Burbank flights
George Bush Intcntl to Las Vegas flights
Oakland to Los Angeles flights

Top 3 airlines flying from Montana to Ontario

Discover the top 3 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$82Average$338FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$232Average$501FlexibilityNo cancel feeOn-time69%
DeltaCheapest$232Average$468FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.