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Missoula

$129+ Cheap flights from Ontario to Missoula (ONT - MSO)

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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
May 17 — May 241
Sat 5/17
Sat 5/24
1 adult, Economy
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Cheap flight deals from Ontario to Missoula

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

Priceline
3 stars

Round-trip from

$240
(Frontier)

One-way from

$129
(Alaska Airlines)

Popular in

February

Cheapest in

May

Average price

$215
Provider with most accurate pricing for Ontario-Missoula Johnson-Bell Field flight deals.
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Provider most trusted by Cheapflights users for Ontario-Missoula Johnson-Bell Field flights.
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From Ontario to Missoula Johnson-Bell Field
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One-way flight from Ontario to Missoula Johnson-Bell Field
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Highest demand for flights based on searches. 19% potential increase in price ($92 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($35 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 Missoula

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

This Frontier deal was found by Cheapflights users on 5/10. 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.
Sun 6/812:59 amONT - MSO
1 stop9h 56mFrontier
Mon 6/1612:40 pmMSO - ONT
1 stop12h 10mFrontier
Deal found 5/10$240
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:10 amONT - MSO
1 stop5h 24mAlaska Airlines
Tue 9/166:40 pmMSO - ONT
1 stop6h 19mAlaska Airlines
Deal found 5/11$258
This Hawaiian Airlines deal was found by Cheapflights users on 5/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/235:49 pmONT - MSO
1 stop5h 10mHawaiian Airlines
Sat 8/305:45 amMSO - ONT
1 stop4h 41mHawaiian Airlines
Deal found 5/11$267
This Delta deal was found by Cheapflights users on 5/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/911:29 amONT - MSO
2 stops12h 02mDelta
Tue 9/166:10 pmMSO - ONT
1 stop6h 36mDelta
Deal found 5/11$278
This American Airlines deal was found by Cheapflights users on 5/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:04 pmONT - MSO
2 stops15h 16mAmerican Airlines
Tue 9/165:07 amMSO - ONT
2 stops10h 44mAmerican Airlines
Deal found 5/11$301
This Orbitz deal was found by Cheapflights users on 5/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1712:59 amONT - MSO
1 stop9h 55mMultiple Airlines
Tue 7/226:36 pmMSO - ONT
1 stop6h 37mMultiple Airlines
Deal found 5/11$325
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Sat 6/281:34 pmONT - MSO
1 stop6h 49mUnited Airlines
Thu 7/34:23 pmMSO - ONT
1 stop7h 29mUnited Airlines
Deal found 5/11$340

Cheapflights Fare Finder

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

Fly from

Ontario

Fly to

Missoula

Route

Depart

Return

Price

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 6/8

12:59 am-11:55 am

1 stop9h 56m

Missoula Johnson-Bell Field

Mon 6/16

12:40 pm-11:50 pm

1 stop12h 10m

$240

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 9/9

7:10 am-1:34 pm

1 stop5h 24m

Missoula Johnson-Bell Field

Tue 9/16

6:40 pm-11:59 pm

1 stop6h 19m

$258

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 8/23

5:49 pm-11:59 pm

1 stop5h 10m

Missoula Johnson-Bell Field

Sat 8/30

5:45 am-9:26 am

1 stop4h 41m

$267

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 9/9

11:29 am-12:31 am

2 stops12h 02m

Missoula Johnson-Bell Field

Tue 9/16

6:10 pm-11:46 pm

1 stop6h 36m

$278

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 9/9

8:04 pm-12:20 pm

2 stops15h 16m

Missoula Johnson-Bell Field

Tue 9/16

5:07 am-2:51 pm

2 stops10h 44m

$301

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 7/17

12:59 am-11:54 am

1 stop9h 55m

Missoula Johnson-Bell Field

Tue 7/22

6:36 pm-12:13 am

1 stop6h 37m

$325

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 6/28

1:34 pm-9:23 pm

1 stop6h 49m

Missoula Johnson-Bell Field

Thu 7/3

4:23 pm-10:52 pm

1 stop7h 29m

$340

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 8/20

7:10 am-1:34 pm

1 stop5h 24m

$129

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 7/16

4:00 pm-12:19 am

1 stop7h 19m

$140

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 8/25

11:29 am-12:24 am

2 stops11h 55m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 12 results
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Compare providers for flights from Ontario to Missoula

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Missoula in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Missoula flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Missoula flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Missoula flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Missoula flights, Cheapflights users trust Priceline the most. Priceline has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Missoula flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Missoula

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Missoula (average of $365). Flying from Ontario to Missoula in March is currently the most expensive (average of $506). 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 MSO?

Find hourly flight availability from Ontario to Missoula. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Missoula in the evening. If you’re flexible enough to do this you can expect to save up to 55% on your trip compared to booking a flight at noon.

Rainfall in Missoula by month

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

In terms of precipitation, rainfall in Missoula ranges from 0.7 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Missoula when rainfall is around 0.7 in.

Temperature in Missoula by month

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

If weather is an important factor for your trip to Missoula, 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 68.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.8 F).

Reviews of airlines servicing Missoula

Get insights into the airlines that provide service to Missoula. 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 Missoula. Reviews last updated May 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

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

Comfort

7.9

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

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

Comfort

7.9

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

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
2,431 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

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
8,724 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

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

Comfort

7.9

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

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 Ontario to Missoula. 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 Ontario to Missoula round-trip?

    Frontier, at $240, was found to be the cheapest airline from Ontario to Missoula.Alternate airlines to your destination round-trip include Alaska Airlines and Hawaiian Airlines. Frontier is priced at 37% lower than the current average price of a flight leaving 3 months from now.

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

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $129. Users have also found prices from $140 and $149 on Hawaiian Airlines and Delta, respectively.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Ontario to Missoula (average of $365). Flying from Ontario to Missoula in March is currently the most expensive (average of $506). 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 3 airlines flying from Ontario to Missoula

Discover the top 3 airlines that operate flights from Ontario to Missoula. 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$181Average$276FlexibilityNo cancel feeOn-time62%
DeltaCheapest$236Average$343FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$273Average$424FlexibilityNo cancel feeOn-time75%

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