HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$144+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — ONT
Feb 17 — Feb 241
Tue 2/17
Tue 2/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Missoula to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 January 18, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$217
(Alaska Airlines)

One-way from

$144
(United Airlines)

Popular in

March

Cheapest in

January

Average price

$236
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. 11% potential increase in price ($44 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 January 2026
Search Deals

Find 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 January 18, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:20 pm
MSO
-
ONT
1 stop7h 24m
Alaska Airlines
Tue 3/106:14 am
ONT
-
MSO
1 stop5h 07m
Alaska Airlines
Deal found 1/17$217
This Alaska Airlines deal was found by Cheapflights users on 1/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:23 am
MSO
-
ONT
1 stop5h 45m
Alaska Airlines
Thu 2/264:02 pm
ONT
-
MSO
1 stop6h 57m
Alaska Airlines
Deal found 1/16$239
This Delta deal was found by Cheapflights users on 1/18. 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 2/206:10 pm
MSO
-
ONT
1 stop6h 39m
Delta
Mon 2/235:00 pm
ONT
-
MSO
1 stop5h 30m
Delta
Deal found 1/18$286
This Expedia deal was found by Cheapflights users on 1/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:55 pm
MSO
-
ONT
1 stop9h 04m
Alaska Airlines
Wed 5/66:00 am
ONT
-
MSO
1 stop7h 59m
Alaska Airlines
Deal found 1/17$288
This United Airlines deal was found by Cheapflights users on 1/17. 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 2/76:00 am
MSO
-
ONT
1 stop7h 47m
United Airlines
Sun 2/85:05 am
ONT
-
MSO
1 stop7h 30m
United Airlines
Deal found 1/17$309
This Delta deal was found by Cheapflights users on 1/17. 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 5/16:18 pm
MSO
-
ONT
1 stop6h 26m
Delta
Wed 5/611:53 am
ONT
-
MSO
2 stops11h 23m
Delta
Deal found 1/17$319
This Alaska Airlines deal was found by Cheapflights users on 1/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/76:23 am
MSO
-
ONT
2 stops13h 53m
Alaska Airlines
Sun 2/86:00 am
ONT
-
MSO
1 stop5h 23m
Alaska Airlines
Deal found 1/17$331
This United Airlines deal was found by Cheapflights users on 1/18. 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 2/142:34 pm
MSO
-
ONT
1 stop7h 16m
United Airlines
Tue 2/175:00 am
ONT
-
MSO
1 stop7h 32m
United Airlines
Deal found 1/18$334
This United Airlines deal was found by Cheapflights users on 1/17. 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 2/62:37 pm
MSO
-
ONT
1 stop7h 21m
United Airlines
Sat 2/76:00 am
ONT
-
MSO
1 stop7h 05m
United Airlines
Deal found 1/17$339
This Alaska Airlines deal was found by Cheapflights users on 1/18. 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 3/174:20 pm
MSO
-
ONT
1 stop7h 24m
Alaska Airlines
Sat 3/216:00 am
ONT
-
MSO
1 stop5h 31m
Alaska Airlines
Deal found 1/18$346
This Delta deal was found by Cheapflights users on 1/17. 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 2/191:16 pm
MSO
-
ONT
2 stops10h 21m
Delta
Sun 2/226:00 am
ONT
-
MSO
1 stop5h 26m
Delta
Deal found 1/17$350

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 January 18, 2026.
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

Tue 3/3

4:20 pm-10:44 pm

1 stop7h 24m

Ontario

Tue 3/10

6:14 am-12:21 pm

1 stop5h 07m

$217

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 2/25

6:23 am-11:08 am

1 stop5h 45m

Ontario

Thu 2/26

4:02 pm-11:59 pm

1 stop6h 57m

$239

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 2/20

6:10 pm-11:49 pm

1 stop6h 39m

Ontario

Mon 2/23

6:00 am-12:26 pm

1 stop5h 26m

$286

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 2/7

6:00 am-12:47 pm

1 stop7h 47m

Ontario

Sun 2/8

5:05 am-1:35 pm

1 stop7h 30m

$309

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 2/14

2:34 pm-8:50 pm

1 stop7h 16m

Ontario

Tue 2/17

5:00 am-1:32 pm

1 stop7h 32m

$334

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 2/6

2:37 pm-8:58 pm

1 stop7h 21m

Ontario

Sat 2/7

6:00 am-2:05 pm

1 stop7h 05m

$339

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Tue 3/17

4:20 pm-10:44 pm

1 stop7h 24m

Ontario

Sat 3/21

6:00 am-12:31 pm

1 stop5h 31m

$346

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 2/19

1:16 pm-10:37 pm

2 stops10h 21m

Ontario

Sun 2/22

6:00 am-12:26 pm

1 stop5h 26m

$350

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 4/18

2:38 pm-8:36 pm

1 stop6h 58m

$144

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 2/20

6:10 pm-11:49 pm

1 stop6h 39m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Showing 1-10 of 15 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 January.
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 $130). 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 January 18, 2026.
Read through reviews of airlines operating flights from Missoula to Ontario, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,740 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

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
11,740 reviews
Alaska Airlines
8.0
Very good
11,740 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

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
8,075 reviews
Alaska Airlines
8.0
Very good
11,740 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

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
United Airlines
7.4
Good
9,176 reviews
Alaska Airlines
8.0
Very good
11,740 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

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 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 and Delta fly from Missoula to Ontario in about 6h 39m. The time it takes to get you to your destination can typically vary by up to 45m. The distance from Missoula to Ontario is about 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 Missoula to Ontario round-trip?

    According to our current data, Delta ($160), United Airlines ($273), and Alaska Airlines ($276) offers the cheapest pricing from Missoula to Ontario. Users have found that Delta is 55% 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 $130). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Missoula to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Bozeman to Las Vegas flights
Bozeman to Los Angeles flights
Missoula to Las Vegas flights
Billings to Las Vegas flights
Helena to Las Vegas flights
Bozeman to San Francisco flights
Bozeman to San Diego flights
Kalispell to Los Angeles flights
Missoula to Los Angeles flights
Billings to Los Angeles flights
Kalispell to Ontario flights
Kalispell to Santa Ana flights
Bozeman to Santa Ana flights
Bozeman to Palm Springs flights
Missoula to Sacramento flights
Kalispell to San Diego flights
Billings to San Diego flights
Missoula to San Diego flights
Bozeman to Ontario flights
Missoula to San Francisco flights
Great Falls to Las Vegas flights
Butte to Las Vegas flights
Missoula to Oakland flights
Kalispell to Sacramento flights
Billings to San Francisco flights
Kalispell to Las Vegas flights
Kalispell to Burbank flights
Missoula to Santa Ana flights
Billings to Sacramento flights
Bozeman to Reno flights
Kalispell to Palm Springs flights
Helena to Los Angeles flights
Missoula to Reno flights
Bozeman to San Jose flights
Helena to San Diego flights
Missoula to Burbank flights
Bozeman to Burbank flights
Bozeman to Long Beach flights
Billings to Santa Ana flights
Billings to Palm Springs flights
Missoula to San Jose flights
Bozeman to Sacramento flights
Kalispell to San Francisco flights
Billings to Ontario flights
Helena to Santa Ana flights
Great Falls to San Francisco flights
Great Falls to Los Angeles flights
Helena to Ontario flights
Great Falls to San Diego flights

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 January 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$160Average$340FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$273Average$356FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$276Average$353FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.