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$130+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/17. 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 12/182:38 pmMSO - ONT
1 stop7h 29mUnited Airlines
Thu 12/255:05 amONT - MSO
1 stop7h 31mUnited Airlines
Deal found 12/17$531
This Delta deal was found by Cheapflights users on 12/17. 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 12/186:16 pmMSO - ONT
1 stop6h 42mDelta
Mon 12/226:00 amONT - MSO
1 stop4h 54mDelta
Deal found 12/17$571
This Delta deal was found by Cheapflights users on 12/15. 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 12/296:15 pmMSO - ONT
1 stop6h 39mDelta
Sat 1/35:10 pmONT - MSO
1 stop5h 56mDelta
Deal found 12/15$577
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/202:38 pmMSO - ONT
1 stop7h 29mUnited Airlines
Wed 12/245:05 amONT - MSO
1 stop7h 31mUnited Airlines
Deal found 12/17$581
This Delta deal was found by Cheapflights users on 12/17. 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 12/186:16 pmMSO - ONT
1 stop6h 42mDelta
Sun 12/215:10 pmONT - MSO
1 stop6h 23mDelta
Deal found 12/17$601
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Fri 12/196:00 amMSO - ONT
1 stop7h 38mUnited Airlines
Tue 12/235:05 amONT - MSO
1 stop7h 31mUnited Airlines
Deal found 12/17$611
This Delta deal was found by Cheapflights users on 12/17. 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 12/186:16 pmMSO - ONT
1 stop6h 42mDelta
Fri 12/194:49 pmONT - MSO
1 stop6h 47mDelta
Deal found 12/17$621
This Delta deal was found by Cheapflights users on 12/15. 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 12/296:15 pmMSO - ONT
1 stop6h 39mDelta
Fri 1/26:00 amONT - MSO
1 stop4h 54mDelta
Deal found 12/15$646
This Delta deal was found by Cheapflights users on 12/17. 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 12/206:15 pmMSO - ONT
1 stop5h 13mDelta
Sun 12/215:10 pmONT - MSO
1 stop6h 23mDelta
Deal found 12/17$651
This Delta deal was found by Cheapflights users on 12/15. 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 12/306:15 pmMSO - ONT
1 stop6h 39mDelta
Sat 1/36:00 amONT - MSO
1 stop4h 54mDelta
Deal found 12/15$662
This Delta deal was found by Cheapflights users on 12/17. 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 12/196:16 pmMSO - ONT
1 stop6h 42mDelta
Mon 12/225:10 pmONT - MSO
1 stop6h 23mDelta
Deal found 12/17$666
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/315:15 pmMSO - ONT
1 stop20h 23mUnited Airlines
Sun 1/45:05 amONT - MSO
1 stop7h 31mUnited Airlines
Deal found 12/16$689

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$243
(Alaska Airlines)

One-way from

$130
(Alaska Airlines)

Popular in

March

Cheapest in

January

Average price

$454
Provider with most accurate pricing for Missoula Johnson-Bell Field-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Missoula Johnson-Bell Field-Ontario flights.
Search Deals
From Missoula Johnson-Bell Field to Ontario
Search Deals
One-way flight from Missoula Johnson-Bell Field to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

Sat 2/28

6:23 am-11:32 pm

1 stop18h 09m

Ontario

Sat 3/7

7:00 am-12:59 pm

1 stop4h 59m

$243

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 1/31

4:20 pm-8:36 pm

1 stop5h 16m

Ontario

Mon 2/2

7:00 am-1:23 pm

1 stop5h 23m

$248

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 1/21

4:20 pm-8:36 pm

1 stop5h 16m

Ontario

Mon 1/26

6:00 am-12:23 pm

1 stop5h 23m

$248

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 1/10

1:03 pm-8:10 pm

1 stop8h 07m

Ontario

Sun 1/18

6:00 am-12:23 pm

1 stop5h 23m

$273

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 1/26

6:23 am-10:59 am

1 stop5h 36m

Ontario

Thu 1/29

4:03 pm-11:55 pm

1 stop6h 52m

$289

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 1/8

6:23 am-10:59 am

1 stop5h 36m

$130

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 1/8

2:37 pm-8:58 pm

1 stop7h 21m

$166

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 12/25

7:00 am-1:52 pm

1 stop7h 52m

$246

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 12/29

4:20 pm-9:17 pm

1 stop5h 57m

$274

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 12/26

6:00 am-12:38 pm

1 stop7h 38m

$366

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 14 results
1
2

Compare providers for flights from Missoula to Ontario

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 Missoula to Ontario in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust 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 Missoula-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Missoula-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Missoula-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Missoula-Ontario 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 Missoula-Ontario 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 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, May is the cheapest month in which you can book a flight from Missoula to Ontario (average of $110). Flying from Missoula to Ontario in September is currently the most expensive (average of $258). 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 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 December 18, 2025.
Read through reviews of airlines operating flights from Missoula to Ontario, such as Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,478 reviews
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
7.9
Good
8,009 reviews
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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.

  • How long is the flight from Missoula to Ontario?

    Airlines like Alaska Airlines fly from Missoula to Ontario in about 18h 09m. The time it takes to get you to your destination can typically vary by up to . The distance from Missoula to Ontario is about 907 mi.

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

    According to our current data, Delta ($160), and Alaska Airlines ($229) offers the cheapest pricing from Missoula to Ontario. Users have found that Delta is 54% cheaper than the other options available to this destination.

  • 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, May is the cheapest month in which you can book a flight from Missoula to Ontario (average of $110). Flying from Missoula to Ontario in September is currently the most expensive (average of $258). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$229Average$327FlexibilityNo cancel feeOn-time75%
DeltaCheapest$236Average$336FlexibilityNo cancel feeOn-timeN/A

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