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$120+ Cheap flights from Missoula to Ontario (MSO - 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Missoula to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Missoula (MSO) 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 June 12, 2025.

Round-trip from

$240
(Alaska Airlines)

One-way from

$120
(Hawaiian Airlines)

Popular in

December

Cheapest in

August

Average price

$327
From Missoula Johnson-Bell Field to Ontario
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One-way flight from Missoula Johnson-Bell Field to Ontario
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Highest demand for flights based on searches. 26% potential increase in price ($147 potential increase over avg. RT price).
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Cheapest flight prices on average. 17% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Missoula to Ontario

Cheapest flights from Missoula to Ontario
Explore the most affordable flight options available from Missoula to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:40 pmMSO - ONT
1 stop6h 19mAlaska Airlines
Tue 9/235:49 pmONT - MSO
1 stop5h 10mAlaska Airlines
Deal found 6/10$240
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/125:35 amMSO - ONT
1 stop4h 31mDelta
Wed 9/175:05 pmONT - MSO
1 stop6h 26mDelta
Deal found 6/10$241
This Hawaiian Airlines 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/105:45 amMSO - ONT
1 stop4h 38mHawaiian Airlines
Thu 7/174:00 pmONT - MSO
1 stop7h 19mHawaiian Airlines
Deal found 6/10$325
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1412:40 pmMSO - ONT
1 stop12h 10mFrontier
Thu 7/1712:59 amONT - MSO
1 stop9h 55mFrontier
Deal found 6/10$336
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/286:30 amMSO - ONT
2 stops12h 07mUnited Airlines
Mon 9/15:10 amONT - MSO
1 stop7h 24mUnited Airlines
Deal found 6/11$393
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/171:54 pmMSO - ONT
1 stop10h 08mAmerican Airlines
Wed 6/1810:54 amONT - MSO
1 stop9h 49mAmerican Airlines
Deal found 6/10$471
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/196:20 amMSO - ONT
1 stop7h 11mMultiple Airlines
Thu 6/196:10 pmONT - MSO
1 stop4h 44mMultiple Airlines
Deal found 6/10$656

Cheapflights Fare Finder

Customize your flight search to find flights from Missoula 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 12, 2025.
Use the filters below to find and compare flights from Missoula to Ontario that are best for you.

Fly from

Missoula

Fly to

Ontario

Route

Depart

Return

Price

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 9/15

6:40 pm-11:59 pm

1 stop6h 19m

Ontario

Tue 9/23

5:49 pm-11:59 pm

1 stop5h 10m

$240

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 9/12

5:35 am-9:06 am

1 stop4h 31m

Ontario

Wed 9/17

5:05 pm-12:31 am

1 stop6h 26m

$241

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 7/10

5:45 am-9:23 am

1 stop4h 38m

Ontario

Thu 7/17

4:00 pm-12:19 am

1 stop7h 19m

$325

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 7/14

12:40 pm-11:50 pm

1 stop12h 10m

Ontario

Thu 7/17

12:59 am-11:54 am

1 stop9h 55m

$336

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 8/28

6:30 am-5:37 pm

2 stops12h 07m

Ontario

Mon 9/1

5:10 am-1:34 pm

1 stop7h 24m

$393

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 6/26

1:54 pm-11:02 pm

1 stop10h 08m

Ontario

Sun 6/29

12:59 am-9:43 pm

1 stop19h 44m

$518

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 7/10

5:45 am-9:23 am

1 stop4h 38m

$120

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 10/6

5:35 am-9:06 am

1 stop4h 31m

$121

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sun 8/31

1:12 pm-11:59 pm

2 stops11h 47m

$197

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 6/19

1:54 pm-9:38 pm

2 stops8h 44m

$206

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 12 results
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Best time to book a flight from Missoula to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Missoula to Ontario (average of $246). Flying from Missoula to Ontario in March is currently the most expensive (average of $328). 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 MSO to ONT?

Find hourly flight availability from Missoula 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 June 12, 2025.

It’s optimal to fly from Missoula to Ontario in the afternoon. By choosing this option you can save up to 32% on the cost of your flight, compared to a flight in the morning.

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 June 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and Hawaiian Airlines from Missoula to Ontario. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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 Missoula to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Missoula to Ontario round-trip?

    According to our current data, Alaska Airlines ($240), Delta ($241), and Hawaiian Airlines ($325) offers the cheapest pricing from Missoula to Ontario. Users have found that Alaska Airlines is 40% cheaper than the other options available to this destination.

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

    The cheapest airline one-way is Hawaiian Airlines, with whom users have recently found tickets for as low as $120. However, be on the lookout for offers from Delta and Alaska Airlines, as they are both options that can get you from Missoula to Ontario for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Missoula to Ontario (average of $246). Flying from Missoula to Ontario in March is currently the most expensive (average of $328). 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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Top 2 airlines flying from Missoula to Ontario

Discover the top 2 airlines that operate flights from Missoula 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$229Average$362FlexibilityNo cancel feeOn-time75%
DeltaCheapest$254Average$309FlexibilityNo cancel feeOn-timeN/A

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