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$160+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
Jan 31 — Feb 71
Sat 1/31
Sat 2/7
1 adult, Economy
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Cheap 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 January 1, 2026.

This Alaska Airlines deal was found by Cheapflights users on 12/30. 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.
Wed 12/3110:44 amONT - MSO
1 stop11h 58mAlaska Airlines
Wed 1/76:23 amMSO - ONT
1 stop9h 45mAlaska Airlines
Deal found 12/30$545
This Alaska Airlines deal was found by Cheapflights users on 12/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/294:36 pmONT - MSO
1 stop6h 06mAlaska Airlines
Mon 1/512:29 pmMSO - ONT
1 stop5h 42mAlaska Airlines
Deal found 12/29$610
This Alaska Airlines deal was found by Cheapflights users on 12/30. 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.
Wed 12/314:36 pmONT - MSO
1 stop6h 06mAlaska Airlines
Tue 1/134:20 pmMSO - ONT
1 stop5h 16mAlaska Airlines
Deal found 12/30$659
This United Airlines deal was found by Cheapflights users on 12/30. 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.
Wed 12/311:40 pmONT - MSO
1 stop7h 01mUnited Airlines
Sun 1/42:38 pmMSO - ONT
1 stop7h 29mUnited Airlines
Deal found 12/30$791
This Alaska Airlines deal was found by Cheapflights users on 12/30. 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.
Wed 12/316:05 pmONT - MSO
1 stop5h 04mAlaska Airlines
Sun 1/412:29 pmMSO - ONT
2 stops12h 45mAlaska Airlines
Deal found 12/30$1,048

Find 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 January 1, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$233
(Delta)

One-way from

$160
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$264
Provider with most accurate pricing for Ontario-Missoula Johnson-Bell Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Missoula Johnson-Bell Field flights.
Search Deals
From Ontario to Missoula Johnson-Bell Field
Search Deals
One-way flight from Ontario to Missoula Johnson-Bell Field
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 1, 2026.
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

Thu 2/26

6:00 am-12:26 pm

1 stop5h 26m

Missoula Johnson-Bell Field

Mon 3/2

1:16 pm-10:37 pm

2 stops10h 21m

$238

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 2/26

6:08 pm-12:59 pm

1 stop17h 51m

Missoula Johnson-Bell Field

Mon 3/2

6:23 am-11:08 am

1 stop5h 45m

$260

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 1/15

10:18 pm-10:03 am

1 stop10h 45m

Missoula Johnson-Bell Field

Mon 1/19

10:53 am-3:07 pm

2 stops29h 14m

$268

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 1/31

4:03 pm-11:55 pm

1 stop6h 52m

Missoula Johnson-Bell Field

Tue 2/3

4:20 pm-8:36 pm

1 stop5h 16m

$269

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 1/15

6:00 am-11:59 am

1 stop4h 59m

Missoula Johnson-Bell Field

Wed 1/28

1:25 pm-10:51 pm

2 stops10h 26m

$282

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 3/2

6:00 am-12:26 pm

1 stop5h 26m

Missoula Johnson-Bell Field

Mon 3/16

1:07 pm-4:28 pm

1 stop4h 21m

$304

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 1/14

4:03 pm-11:55 pm

1 stop6h 52m

$160

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 1/15

4:34 pm-10:03 am

1 stop16h 29m

$164

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 3/21

6:00 am-12:31 pm

1 stop5h 31m

$167

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 1/5

6:00 am-3:30 pm

1 stop8h 30m

$255

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

Showing 1-10 of 14 results
1
2

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Missoula flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, May is the cheapest month in which you can book a flight from Ontario to Missoula (average of $90). Flying from Ontario to Missoula in September is currently the most expensive (average of $289). 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.

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 January 1, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines and Delta from Ontario to Missoula to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,596 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,596 reviews
Alaska Airlines
8.0
Very good
11,596 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Delta
7.9
Good
8,017 reviews
Alaska Airlines
8.0
Very good
11,596 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

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.

  • How long is the flight from Ontario to Missoula?

    Delta and Alaska Airlines can get you from Ontario to Missoula in just under 5h 26m. Your travel time can differ by up to 12h 25m. Airlines will cover a distance of 907 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Delta, at $236, was found to be the cheapest airline from Ontario to Missoula. An alternate airline flying to your destination would be Alaska Airlines. Delta is priced at 42% lower than the current average price of a flight leaving 3 months from now.

  • 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, May is the cheapest month in which you can book a flight from Ontario to Missoula (average of $90). Flying from Ontario to Missoula in September is currently the most expensive (average of $289). 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.

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Top 2 airlines flying from Ontario to Missoula

Discover the top 2 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 January 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$236Average$394FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$244Average$405FlexibilityNo cancel feeOn-time75%

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