HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Montana

$96+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BZN
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Montana 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 Ontario to Montana

Keep the following information in mind while searching for Ontario to Montana flight deals. Data was last updated July 29, 2025.

Round-trip from

$218
(Frontier)

One-way from

$96
(Trip.com)

Popular in

November

Cheapest in

January

Average price

$414
From Ontario to Montana
Search Deals
One-way flight from Ontario to Montana
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 29, 2025.

This Frontier deal was found by Cheapflights users on 7/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/312:59 amONT - MSO
1 stop9h 55mFrontier
Fri 8/812:40 pmMSO - ONT
1 stop12h 10mFrontier
Deal found 7/27$218
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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 9/96:00 amONT - BZN
1 stop7h 14mHawaiian Airlines
Wed 9/1711:26 amBZN - ONT
1 stop8h 21mHawaiian Airlines
Deal found 7/28$236
This Delta deal was found by Cheapflights users on 7/28. 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 8/189:50 amONT - WYS
1 stop4h 00mDelta
Wed 8/203:25 pmWYS - ONT
2 stops8h 17mDelta
Deal found 7/28$236
This Delta deal was found by Cheapflights users on 7/28. 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 8/266:05 amONT - BZN
1 stop3h 48mDelta
Tue 9/25:30 amBZN - ONT
1 stop4h 25mDelta
Deal found 7/28$237
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 9/63:06 pmONT - BZN
1 stop6h 32mAlaska Airlines
Thu 9/188:00 amBZN - ONT
1 stop7h 12mAlaska Airlines
Deal found 7/28$238
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 9/85:49 pmONT - MSO
1 stop5h 10mAlaska Airlines
Mon 9/155:45 amMSO - ONT
1 stop4h 41mAlaska Airlines
Deal found 7/28$240
This Hawaiian Airlines deal was found by Cheapflights users on 7/27. 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 10/156:00 amONT - FCA
1 stop5h 22mHawaiian Airlines
Wed 10/226:31 amFCA - ONT
1 stop7h 06mHawaiian Airlines
Deal found 7/27$240
This Delta deal was found by Cheapflights users on 7/27. 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 9/246:00 amONT - FCA
1 stop4h 14mDelta
Mon 9/295:20 amFCA - ONT
1 stop4h 37mDelta
Deal found 7/27$241
This Delta deal was found by Cheapflights users on 7/29. 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.
Wed 8/274:50 pmONT - BIL
1 stop4h 57mDelta
Wed 9/36:08 pmBIL - ONT
1 stop5h 32mDelta
Deal found 7/29$241
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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.
Sat 9/276:00 amONT - MSO
1 stop8h 18mHawaiian Airlines
Wed 10/85:40 amMSO - ONT
1 stop5h 21mHawaiian Airlines
Deal found 7/28$259
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 9/2011:39 amONT - BIL
1 stop5h 59mAlaska Airlines
Wed 9/246:00 amBIL - ONT
1 stop5h 44mAlaska Airlines
Deal found 7/27$259
This Delta deal was found by Cheapflights users on 7/27. 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 9/139:50 amONT - MSO
1 stop6h 17mDelta
Wed 9/175:30 amMSO - ONT
1 stop4h 27mDelta
Deal found 7/27$260

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 July 29, 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

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 8/3

12:59 am-11:54 am

1 stop9h 55m

Missoula Johnson-Bell Field

Fri 8/8

12:40 pm-11:50 pm

1 stop12h 10m

$218

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Tue 9/9

6:00 am-2:14 pm

1 stop7h 14m

Bozeman Gallatin Field

Wed 9/17

11:26 am-6:47 pm

1 stop8h 21m

$236

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Mon 8/18

9:50 am-2:50 pm

1 stop4h 00m

West Yellowstone

Wed 8/20

3:25 pm-10:42 pm

2 stops8h 17m

$236

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Tue 8/26

6:05 am-10:53 am

1 stop3h 48m

Bozeman Gallatin Field

Tue 9/2

5:30 am-8:55 am

1 stop4h 25m

$237

OntarioKalispell

ONT - FCA

ONTFCA

Ontario

Wed 10/15

6:00 am-12:22 pm

1 stop5h 22m

Kalispell Glacier Park

Wed 10/22

6:31 am-12:37 pm

1 stop7h 06m

$240

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 9/8

5:49 pm-11:59 pm

1 stop5h 10m

Missoula Johnson-Bell Field

Mon 9/15

5:45 am-9:26 am

1 stop4h 41m

$240

OntarioKalispell

ONT - FCA

ONTFCA

Ontario

Wed 9/24

6:00 am-11:14 am

1 stop4h 14m

Kalispell Glacier Park

Mon 9/29

5:20 am-8:57 am

1 stop4h 37m

$241

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 8/27

4:50 pm-10:47 pm

1 stop4h 57m

Billings Logan Intl

Wed 9/3

6:08 pm-10:40 pm

1 stop5h 32m

$241

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 9/27

6:00 am-3:18 pm

1 stop8h 18m

Missoula Johnson-Bell Field

Wed 10/8

5:40 am-10:01 am

1 stop5h 21m

$259

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 9/20

11:39 am-6:38 pm

1 stop5h 59m

Billings Logan Intl

Wed 9/24

6:00 am-10:44 am

1 stop5h 44m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 52 results
1
2
3
...
6

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 May is currently the most expensive (average of $478). 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 July 29, 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.

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 July 29, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Ontario to Montana have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

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
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

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
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

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
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

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 $115 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $118 and Delta from $119 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 May is currently the most expensive (average of $478). 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 Ontario to Montana

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to Newark flights
San Francisco to Seattle flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to LaGuardia flights
Ontario to San Francisco flights
Los Angeles to Las Vegas flights
Los Angeles to O'Hare Intl flights
Ontario to Seattle flights
Los Angeles to San Francisco flights
Burbank to Las Vegas flights
San Francisco to Honolulu flights
Ontario to John F Kennedy Intl flights
Santa Ana to Las Vegas flights
San Francisco to LaGuardia flights
Los Angeles to Boston flights
San Francisco to Los Angeles flights
San Jose to Seattle flights
San Francisco to Las Vegas flights
Santa Ana to San Francisco flights
San Jose to Los Angeles flights
Los Angeles to San Jose flights
San Francisco to Ontario flights
San Jose to Las Vegas flights
Ontario to Honolulu flights
Los Angeles to Portland flights
Santa Ana to Seattle flights
San Francisco to O'Hare Intl flights
Burbank to Newark flights
Oakland to Las Vegas flights
Los Angeles to Miami flights
Ontario to Newark flights
Los Angeles to Hobby flights
Los Angeles to Oakland flights
San Francisco to Santa Ana flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to Kahului flights
San Francisco to Boston flights
Oakland to Los Angeles flights
Los Angeles to Orlando flights
Santa Ana to Newark flights
Oakland to Santa Ana flights
San Diego to John F Kennedy Intl flights
San Diego to Newark flights
Burbank to Seattle flights
Ontario to O'Hare Intl flights

Top 4 airlines flying from Ontario to Montana

Discover the top 4 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$198Average$335FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$219Average$381FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$224Average$432FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$236Average$378FlexibilityNo 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.