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Missoula

$139+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
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 March 10, 2026.

This Delta deal was found by Cheapflights users on 3/8. 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 4/75:09 pm
ONT
-
MSO
1 stop6h 15m
Delta
Tue 4/141:40 pm
MSO
-
ONT
2 stops9h 57m
Delta
Deal found 3/8$271
This Delta deal was found by Cheapflights users on 3/8. 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 4/45:45 pm
ONT
-
MSO
1 stop4h 33m
Delta
Tue 4/76:04 pm
MSO
-
ONT
1 stop6h 47m
Delta
Deal found 3/8$277
This Delta deal was found by Cheapflights users on 3/8. 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 4/65:09 pm
ONT
-
MSO
1 stop6h 15m
Delta
Tue 4/76:04 pm
MSO
-
ONT
1 stop6h 47m
Delta
Deal found 3/8$279
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 7/212:09 pm
ONT
-
MSO
1 stop7h 43m
Alaska Airlines
Wed 7/297:00 am
MSO
-
ONT
1 stop7h 13m
Alaska Airlines
Deal found 3/9$281
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 5/57:00 am
ONT
-
MSO
1 stop5h 19m
Alaska Airlines
Sat 5/93:55 pm
MSO
-
ONT
1 stop18h 50m
Alaska Airlines
Deal found 3/9$293
This Delta deal was found by Cheapflights users on 3/9. 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 5/95:55 pm
ONT
-
MSO
1 stop4h 21m
Delta
Sun 5/176:05 pm
MSO
-
ONT
1 stop6h 29m
Delta
Deal found 3/9$294
This Delta deal was found by Cheapflights users on 3/8. 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 4/85:09 pm
ONT
-
MSO
1 stop6h 15m
Delta
Fri 4/101:07 pm
MSO
-
ONT
1 stop4h 21m
Delta
Deal found 3/8$296
This Alaska Airlines deal was found by Cheapflights users on 3/10. 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 9/174:00 pm
ONT
-
MSO
1 stop7h 19m
Alaska Airlines
Wed 9/234:13 pm
MSO
-
ONT
1 stop7h 26m
Alaska Airlines
Deal found 3/10$301
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 5/134:03 pm
ONT
-
MSO
1 stop6h 56m
Alaska Airlines
Mon 5/188:02 pm
MSO
-
ONT
1 stop4h 56m
Alaska Airlines
Deal found 3/9$304
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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 7/82:09 pm
ONT
-
MSO
1 stop7h 43m
Alaska Airlines
Thu 7/167:59 pm
MSO
-
ONT
1 stop16h 15m
Alaska Airlines
Deal found 3/7$306
This Delta deal was found by Cheapflights users on 3/8. 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.
Sun 7/269:55 am
ONT
-
MSO
1 stop6h 28m
Delta
Wed 8/55:40 am
MSO
-
ONT
1 stop4h 21m
Delta
Deal found 3/8$310

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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$271
(Delta)

One-way from

$139
(Delta)

Popular in

December

Cheapest in

April

Average price

$536
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. 4% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 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 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 March 10, 2026.
Use the filters below to find and compare flights from Ontario to Missoula that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 7/28

5:05 pm-12:24 am

1 stop6h 19m

Missoula Johnson-Bell Field

Tue 8/4

5:40 am-9:01 am

1 stop4h 21m

$281

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 6/2

6:00 am-12:16 pm

1 stop5h 16m

Missoula Johnson-Bell Field

Mon 6/8

8:02 pm-11:58 pm

1 stop4h 56m

$306

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 4/2

6:00 am-3:35 pm

1 stop8h 35m

Missoula Johnson-Bell Field

Thu 4/16

1:53 pm-11:59 pm

1 stop11h 06m

$323
Quickest round-trip

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 8/26

12:00 pm-5:56 pm

1 stop4h 56m

Missoula Johnson-Bell Field

Sat 8/29

6:36 pm-10:39 pm

1 stop5h 03m

$325

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 7/27

2:09 pm-10:52 pm

1 stop7h 43m

Missoula Johnson-Bell Field

Sun 8/2

7:00 am-1:13 pm

1 stop7h 13m

$325

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 5/27

4:03 pm-11:59 pm

1 stop6h 56m

Missoula Johnson-Bell Field

Sun 5/31

8:02 pm-11:58 pm

1 stop4h 56m

$325

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 7/15

12:02 pm-7:19 pm

1 stop6h 17m

Missoula Johnson-Bell Field

Wed 7/22

11:22 am-5:00 pm

1 stop6h 38m

$339

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 8/15

2:09 pm-10:52 pm

1 stop7h 43m

Missoula Johnson-Bell Field

Mon 8/17

4:57 pm-11:11 pm

1 stop7h 14m

$345

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 5/5

7:00 am-1:19 pm

1 stop5h 19m

Missoula Johnson-Bell Field

Sat 5/9

3:55 pm-11:48 pm

2 stops8h 53m

$345

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Fri 5/15

4:03 pm-11:59 pm

1 stop6h 56m

Missoula Johnson-Bell Field

Mon 5/18

8:02 pm-11:58 pm

1 stop4h 56m

$395

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 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 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 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 March is currently the most expensive (average of $296). 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 March 10, 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
12,014 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Alaska Airlines
8.0
Very good
12,014 reviews
Alaska Airlines
8.0
Very good
12,014 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Delta
7.9
Good
8,276 reviews
Alaska Airlines
8.0
Very good
12,014 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

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 6h 15m. Your travel time can differ by up to 1h 28m. 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 43% 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 March is currently the most expensive (average of $296). 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.

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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$240Average$520FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$244Average$405FlexibilityNo cancel feeOn-time75%

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