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$161+ 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — ONT
Apr 24 — May 11
Fri 4/24
Fri 5/1
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 March 25, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:54 pm
MSO
-
ONT
1 stop14h 50m
Multiple Airlines
Fri 4/2411:44 am
ONT
-
MSO
1 stop7h 20m
Multiple Airlines
Deal found 3/24$241
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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.
Sat 4/253:55 pm
MSO
-
ONT
1 stop7h 37m
Alaska Airlines
Wed 4/296:00 am
ONT
-
MSO
1 stop7h 59m
Alaska Airlines
Deal found 3/23$329
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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 4/211:11 pm
MSO
-
ONT
1 stop4h 58m
Alaska Airlines
Wed 4/226:00 am
ONT
-
MSO
1 stop7h 59m
Alaska Airlines
Deal found 3/23$350
This Delta deal was found by Cheapflights users on 3/21. 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 5/26:18 pm
MSO
-
ONT
1 stop5h 25m
Delta
Mon 5/45:05 pm
ONT
-
MSO
1 stop6h 11m
Delta
Deal found 3/21$353
This CheapOair deal was found by Cheapflights users on 3/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:00 am
MSO
-
ONT
1 stop17h 59m
Alaska Airlines
Wed 4/226:00 am
ONT
-
MSO
1 stop7h 59m
Alaska Airlines
Deal found 3/24$365
This United Airlines deal was found by Cheapflights users on 3/23. 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 4/182:38 pm
MSO
-
ONT
1 stop6h 58m
United Airlines
Sat 5/231:18 pm
ONT
-
MSO
1 stop7h 16m
United Airlines
Deal found 3/23$369
This Delta deal was found by Cheapflights users on 3/21. 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 4/226:18 pm
MSO
-
ONT
1 stop6h 26m
Delta
Sun 4/266:00 am
ONT
-
MSO
1 stop6h 22m
Delta
Deal found 3/21$403
This American Airlines deal was found by Cheapflights users on 3/23. 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.
Sat 4/186:45 am
MSO
-
ONT
2 stops13h 49m
American Airlines
Sat 5/2312:41 pm
ONT
-
MSO
1 stop8h 57m
American Airlines
Deal found 3/23$406

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 March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$241
(Kiwi.com)

One-way from

$161
(Delta)

Popular in

July

Cheapest in

January

Average price

$428
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. 13% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 25, 2026.
Use the filters below to find and compare flights from Missoula to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 4/25

3:55 pm-10:32 pm

1 stop7h 37m

Ontario

Wed 4/29

6:00 am-12:28 pm

1 stop5h 28m

$329

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Tue 4/21

1:11 pm-5:09 pm

1 stop4h 58m

Ontario

Wed 4/22

6:00 am-2:59 pm

1 stop7h 59m

$350
Quickest round-trip

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 5/2

6:18 pm-10:43 pm

1 stop5h 25m

Ontario

Mon 5/4

5:05 pm-12:16 am

1 stop6h 11m

$353

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Tue 5/26

8:02 pm-11:58 pm

1 stop4h 56m

Ontario

Sat 5/30

4:03 pm-11:59 pm

1 stop6h 56m

$365

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 4/13

4:23 pm-11:59 pm

1 stop8h 36m

Ontario

Tue 4/14

6:00 am-12:31 pm

1 stop5h 31m

$412
Cheapest one-way
Quickest one-way

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 5/25

5:30 am-8:53 am

1 stop4h 23m

$161

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sun 8/23

9:52 pm-3:09 pm

1 stop18h 17m

$168

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 5/8

5:30 am-8:53 am

1 stop4h 23m

$185

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 5/9

3:55 pm-10:32 pm

1 stop7h 37m

$205

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 5/22

8:02 pm-11:58 pm

1 stop4h 56m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 15 resultsSorted by cheapest first
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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Missoula-Ontario flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, August is the cheapest month in which you can book a flight from Missoula to Ontario (average of $129). Flying from Missoula to Ontario in December is currently the most expensive (average of $248). 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 March 25, 2026.
Read through reviews of airlines operating flights from Missoula to Ontario, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,108 reviews

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
Alaska Airlines
7.9
Good
12,108 reviews
Alaska Airlines
7.9
Good
12,108 reviews

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
Delta
7.9
Good
8,326 reviews
Alaska Airlines
7.9
Good
12,108 reviews

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
United Airlines
7.4
Good
9,477 reviews
Alaska Airlines
7.9
Good
12,108 reviews

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

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 7h 37m. 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), United Airlines ($259), and Alaska Airlines ($276) offers the cheapest pricing from Missoula to Ontario. Users have found that Delta is 56% 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, August is the cheapest month in which you can book a flight from Missoula to Ontario (average of $129). Flying from Missoula to Ontario in December is currently the most expensive (average of $248). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Missoula to Ontario

Discover the top 3 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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$160Average$340FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$259Average$288FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$276Average$353FlexibilityNo cancel feeOn-time75%

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