HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$98+ 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
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

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 June 10, 2026.

This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:00 pm
BZN
-
ONT
1 stop5h 48m
Delta
Mon 11/25:05 pm
ONT
-
BZN
1 stop6h 05m
Delta
Deal found 6/8$233
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:00 pm
BZN
-
ONT
1 stop5h 48m
Delta
Sun 11/16:00 am
ONT
-
BZN
1 stop5h 23m
Delta
Deal found 6/8$260
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 8/186:03 am
BZN
-
ONT
1 stop6h 11m
Alaska Airlines
Tue 8/253:07 pm
ONT
-
BZN
1 stop6h 52m
Alaska Airlines
Deal found 6/6$271
This Southwest deal was found by Cheapflights users on 6/10. 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.
Thu 7/96:10 am
BZN
-
ONT
2 stops6h 10m
Southwest
Sun 7/127:00 pm
ONT
-
BZN
1 stop4h 15m
Southwest
Deal found 6/10$276
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:03 pm
FCA
-
ONT
1 stop4h 47m
Alaska Airlines
Tue 11/37:15 am
ONT
-
FCA
1 stop5h 10m
Alaska Airlines
Deal found 6/9$277
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 7/216:03 am
BZN
-
ONT
1 stop6h 11m
Alaska Airlines
Tue 7/212:05 pm
ONT
-
BZN
1 stop8h 14m
Alaska Airlines
Deal found 6/6$288
This Delta deal was found by Cheapflights users on 6/6. 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 6/245:15 am
BZN
-
ONT
1 stop4h 35m
Delta
Mon 7/65:21 pm
ONT
-
BZN
1 stop6h 02m
Delta
Deal found 6/6$291
This Southwest deal was found by Cheapflights users on 6/7. 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.
Thu 7/27:15 pm
BZN
-
ONT
1 stop5h 15m
Southwest
Sun 7/57:00 pm
ONT
-
BZN
1 stop4h 15m
Southwest
Deal found 6/7$294
This CheapOair deal was found by Cheapflights users on 6/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:45 pm
FCA
-
ONT
1 stop4h 57m
Alaska Airlines
Wed 10/147:23 am
ONT
-
FCA
1 stop5h 00m
Alaska Airlines
Deal found 6/9$303
This Delta deal was found by Cheapflights users on 6/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:33 pm
BIL
-
ONT
1 stop6h 01m
Delta
Mon 8/245:05 pm
ONT
-
BIL
1 stop4h 20m
Delta
Deal found 6/8$311
This Delta deal was found by Cheapflights users on 6/7. 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.
Thu 7/165:15 am
BZN
-
ONT
1 stop4h 32m
Delta
Fri 7/175:10 pm
ONT
-
BZN
1 stop6h 13m
Delta
Deal found 6/7$315
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 8/176:03 am
BZN
-
ONT
1 stop6h 11m
Alaska Airlines
Thu 8/273:07 pm
ONT
-
BZN
1 stop6h 52m
Alaska Airlines
Deal found 6/6$317

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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$233
(Delta)

One-way from

$98
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$390
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. 12% potential increase in price ($48 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 June 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 June 10, 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

Thu 9/24

3:42 pm-8:24 pm

1 stop5h 42m

Ontario

Mon 9/28

7:12 am-1:24 pm

1 stop5h 12m

$271

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Sat 10/31

2:03 pm-6:00 pm

1 stop4h 57m

Ontario

Tue 11/3

7:15 am-1:25 pm

1 stop5h 10m

$277

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Wed 6/24

5:15 am-8:50 am

1 stop4h 35m

Ontario

Fri 7/3

5:21 pm-12:23 am

1 stop6h 02m

$291

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 6/30

7:30 pm-11:49 pm

1 stop5h 19m

Ontario

Mon 7/6

5:21 pm-12:23 am

1 stop6h 02m

$291

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 6/30

7:30 pm-11:49 pm

1 stop5h 19m

Ontario

Fri 7/3

5:21 pm-12:23 am

1 stop6h 02m

$291

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 10/23

7:00 pm-11:48 pm

1 stop5h 48m

Ontario

Mon 11/2

5:05 pm-12:10 am

1 stop6h 05m

$291

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 7/2

7:15 pm-11:30 pm

1 stop5h 15m

Ontario

Sun 7/12

7:00 pm-12:15 am

1 stop4h 15m

$294

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 8/25

7:03 am-2:09 pm

1 stop8h 06m

Ontario

Sat 8/29

6:02 am-2:38 pm

1 stop7h 36m

$294

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 7/16

5:15 am-8:47 am

1 stop4h 32m

Ontario

Fri 7/17

5:10 pm-12:23 am

1 stop6h 13m

$315
Quickest round-trip

HelenaOntario

HLN - ONT

HLNONT

Helena

Mon 7/20

5:40 am-8:47 am

1 stop4h 07m

Ontario

Sat 8/1

5:10 pm-10:39 pm

1 stop4h 29m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 $108). Flying from Montana to Ontario in September is currently the most expensive (average of $260). 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.

How much does it cost to fly round-trip from Montana to Ontario?

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 4h 44m. Airlines will cover a distance of 999 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, Billings Logan Intl - Ontario or Great Falls - 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 $108). Flying from Montana to Ontario in September is currently the most expensive (average of $260). 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 San Francisco flights
Newark to San Francisco flights
LaGuardia to San Francisco flights
Newark to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
Dallas/Fort Worth to Los Angeles flights
Seattle to Las Vegas flights
Newark to Las Vegas flights
San Francisco to Las Vegas flights
O'Hare Intl to Las Vegas flights
Hobby to Las Vegas flights
Seattle to Los Angeles flights
Seattle to San Francisco flights
John F Kennedy Intl to Las Vegas flights
Los Angeles to Las Vegas flights
LaGuardia to Los Angeles flights
Atlanta to Las Vegas flights
Seattle to Ontario flights
San Francisco to Ontario flights
Dallas/Fort Worth to San Francisco flights
O'Hare Intl to Los Angeles flights
Ontario to San Francisco flights
Reagan-National to Los Angeles flights
George Bush Intcntl to Las Vegas flights
Hobby to Los Angeles flights
Dulles Intl to Las Vegas flights
Baltimore to Los Angeles flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
Dulles Intl to Los Angeles flights
John F Kennedy Intl to Ontario flights
LaGuardia to Las Vegas flights
Detroit to Las Vegas flights
Dulles Intl to San Francisco flights
Atlanta to Los Angeles flights
Newark to San Jose flights
Dallas/Fort Worth to Ontario flights
O'Hare Intl to San Francisco flights
Reagan-National to Las Vegas flights
Baltimore to Las Vegas flights
San Francisco to San Diego flights
Boston to Las Vegas flights
Denver to Las Vegas flights
George Bush Intcntl to Los Angeles flights
Orlando to Las Vegas flights
Los Angeles to San Jose flights
John F Kennedy Intl to San Jose flights
Seattle to San Diego flights
Boston to Los Angeles flights

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 June 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$108Average$337FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$163Average$357FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$164Average$321FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$223Average$360FlexibilityNo cancel feeOn-time63%

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.
Site
©2026 Cheapflights