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Missoula

$131+ 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 6/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
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 21, 2026.

This Delta deal was found by Cheapflights users on 1/20. 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 2/266:00 am
ONT
-
MSO
1 stop5h 26m
Delta
Mon 3/26:10 pm
MSO
-
ONT
1 stop6h 39m
Delta
Deal found 1/20$261
This Delta deal was found by Cheapflights users on 1/20. 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 2/45:10 pm
ONT
-
MSO
1 stop6h 18m
Delta
Tue 2/106:18 pm
MSO
-
ONT
1 stop6h 40m
Delta
Deal found 1/20$269
This Delta deal was found by Cheapflights users on 1/19. 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 2/165:00 pm
ONT
-
MSO
1 stop5h 30m
Delta
Mon 2/236:10 pm
MSO
-
ONT
1 stop6h 39m
Delta
Deal found 1/19$286
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/145:00 am
ONT
-
MSO
1 stop7h 32m
United Airlines
Sat 2/286:15 am
MSO
-
ONT
1 stop7h 28m
United Airlines
Deal found 1/19$287
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 7/15:33 pm
ONT
-
MSO
1 stop5h 46m
Alaska Airlines
Tue 7/76:36 pm
MSO
-
ONT
1 stop6h 20m
Alaska Airlines
Deal found 1/19$296
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/185:00 am
ONT
-
MSO
1 stop7h 32m
United Airlines
Fri 2/202:34 pm
MSO
-
ONT
1 stop7h 16m
United Airlines
Deal found 1/19$309
This Delta deal was found by Cheapflights users on 1/20. 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 5/155:05 pm
ONT
-
MSO
1 stop6h 19m
Delta
Sun 5/175:40 am
MSO
-
ONT
1 stop4h 21m
Delta
Deal found 1/20$315
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 2/267:00 am
ONT
-
MSO
1 stop4h 59m
Alaska Airlines
Mon 3/26:23 am
MSO
-
ONT
2 stops13h 34m
Alaska Airlines
Deal found 1/20$318
This Delta deal was found by Cheapflights users on 1/20. 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 2/65:10 pm
ONT
-
MSO
1 stop6h 18m
Delta
Tue 2/106:18 pm
MSO
-
ONT
1 stop6h 40m
Delta
Deal found 1/20$319
This Delta deal was found by Cheapflights users on 1/19. 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 2/126:00 am
ONT
-
MSO
1 stop5h 26m
Delta
Tue 2/176:10 pm
MSO
-
ONT
1 stop6h 39m
Delta
Deal found 1/19$320
This Delta deal was found by Cheapflights users on 1/20. 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 2/46:00 am
ONT
-
MSO
1 stop5h 35m
Delta
Mon 2/96:18 pm
MSO
-
ONT
1 stop6h 40m
Delta
Deal found 1/20$321

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 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$261
(Delta)

One-way from

$131
(Alaska Airlines)

Popular in

December

Cheapest in

April

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. 1% potential increase in price ($6 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 January 2026
Search Deals

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 21, 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

6:10 pm-11:49 pm

1 stop6h 39m

$261

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 2/5

6:00 am-12:35 pm

1 stop5h 35m

Missoula Johnson-Bell Field

Tue 2/10

6:18 pm-11:58 pm

1 stop6h 40m

$269

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 2/4

5:10 pm-12:28 am

1 stop6h 18m

Missoula Johnson-Bell Field

Tue 2/10

6:18 pm-11:58 pm

1 stop6h 40m

$269

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 2/16

5:00 pm-11:30 pm

1 stop5h 30m

Missoula Johnson-Bell Field

Mon 2/23

6:10 pm-11:49 pm

1 stop6h 39m

$286

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 7/1

5:33 pm-12:19 am

1 stop5h 46m

Missoula Johnson-Bell Field

Tue 7/7

6:36 pm-11:56 pm

1 stop6h 20m

$296

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 2/18

5:00 am-1:32 pm

1 stop7h 32m

Missoula Johnson-Bell Field

Fri 2/20

2:34 pm-8:50 pm

1 stop7h 16m

$309

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Fri 5/15

5:05 pm-12:24 am

1 stop6h 19m

Missoula Johnson-Bell Field

Sun 5/17

5:40 am-9:01 am

1 stop4h 21m

$315

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 2/26

7:00 am-12:59 pm

1 stop4h 59m

Missoula Johnson-Bell Field

Mon 3/2

6:23 am-6:57 pm

2 stops13h 34m

$318

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Fri 2/6

5:10 pm-12:28 am

1 stop6h 18m

Missoula Johnson-Bell Field

Tue 2/10

6:18 pm-11:58 pm

1 stop6h 40m

$319

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 2/5

6:00 am-12:35 pm

1 stop5h 35m

Missoula Johnson-Bell Field

Mon 2/9

6:18 pm-11:58 pm

1 stop6h 40m

$321

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 19 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

*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 Expedia the most. Expedia 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 October is currently the most expensive (average of $262). 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 21, 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
11,768 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,768 reviews
Alaska Airlines
8.0
Very good
11,768 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,086 reviews
Alaska Airlines
8.0
Very good
11,768 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 20m. 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 $240, 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 41% 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 October is currently the most expensive (average of $262). 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 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 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$240Average$408FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$244Average$405FlexibilityNo cancel feeOn-time75%

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