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Missoula

$130+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Find 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 October 27, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Tue 11/255:06 pmONT - MSO
1 stop27h 29mMultiple Airlines
Wed 12/31:11 pmMSO - ONT
1 stop25h 53mMultiple Airlines
Deal found 10/25$273
This Frontier deal was found by Cheapflights users on 10/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2312:58 amONT - MSO
1 stop10h 11mFrontier
Fri 11/287:01 pmMSO - ONT
1 stop5h 56mFrontier
Deal found 10/25$310
This Delta deal was found by Cheapflights users on 10/26. 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 11/104:49 pmONT - MSO
1 stop6h 30mDelta
Fri 11/146:16 pmMSO - ONT
1 stop6h 36mDelta
Deal found 10/26$321
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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.
Fri 12/194:36 pmONT - MSO
1 stop6h 06mAlaska Airlines
Sun 1/44:21 pmMSO - ONT
1 stop24h 21mAlaska Airlines
Deal found 10/25$332
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/246:11 pmONT - MSO
1 stop5h 11mAlaska Airlines
Wed 12/31:12 pmMSO - ONT
1 stop7h 51mAlaska Airlines
Deal found 10/25$374
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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 11/157:20 amONT - MSO
1 stop4h 59mAlaska Airlines
Sat 11/225:30 amMSO - ONT
1 stop19h 25mAlaska Airlines
Deal found 10/27$391
This Delta deal was found by Cheapflights users on 10/27. 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 11/156:45 amONT - MSO
2 stops9h 49mDelta
Sat 11/226:16 pmMSO - ONT
1 stop4h 33mDelta
Deal found 10/27$400
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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 11/204:11 pmONT - MSO
1 stop6h 32mAlaska Airlines
Mon 11/246:02 amMSO - ONT
1 stop10h 52mAlaska Airlines
Deal found 10/27$413
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/246:11 pmONT - MSO
1 stop5h 11mAlaska Airlines
Tue 12/22:14 pmMSO - ONT
1 stop5h 19mAlaska Airlines
Deal found 10/25$418

Cheap 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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$260
(Alaska Airlines)

One-way from

$130
(Alaska Airlines)

Popular in

February

Cheapest in

January

Average price

$290
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. 10% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 27, 2025.
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

11:30 am-5:56 pm

1 stop5h 26m

Missoula Johnson-Bell Field

Mon 3/2

1:20 pm-7:47 pm

1 stop7h 27m

$260

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 11/25

5:06 pm-9:35 pm

1 stop27h 29m

Missoula Johnson-Bell Field

Wed 12/3

1:11 pm-2:04 pm

1 stop25h 53m

$273

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 11/26

6:30 am-9:35 pm

1 stop14h 05m

Missoula Johnson-Bell Field

Wed 12/3

1:11 pm-11:09 am

2 stops22h 58m

$305

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 11/23

12:58 am-12:09 pm

1 stop10h 11m

Missoula Johnson-Bell Field

Fri 11/28

7:01 pm-11:57 pm

1 stop5h 56m

$310

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 11/10

4:49 pm-12:19 am

1 stop6h 30m

Missoula Johnson-Bell Field

Fri 11/14

6:16 pm-11:52 pm

1 stop6h 36m

$321

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Fri 12/19

4:36 pm-11:42 pm

1 stop6h 06m

Missoula Johnson-Bell Field

Sun 1/4

4:21 pm-3:42 pm

1 stop24h 21m

$332

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 12/31

6:05 pm-12:09 am

1 stop5h 04m

$130

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 12/17

7:10 am-1:34 pm

1 stop5h 24m

$130

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 1/1

6:00 am-11:54 am

1 stop4h 54m

$156

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Fri 1/2

5:10 pm-12:33 am

1 stop6h 23m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 13 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Missoula flight deals on Cheapflights vs. eDreams >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 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 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 September is currently the most expensive (average of $289). 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.

What is the cheapest time of day to fly from ONT to MSO?

Find hourly flight availability from Ontario to Missoula. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Missoula in the evening. If you’re flexible enough to do this you can expect to save up to 54% on your trip compared to booking a flight at noon.

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 October 27, 2025.
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
11,193 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Crew

8.5

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
11,193 reviews
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Crew

8.5

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
7,996 reviews
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Crew

8.5

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 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?

    Alaska Airlines can get you from Ontario to Missoula in just under 5h 26m. Your travel time can differ by up to . Airlines will cover a distance of 907 mi.

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

    Delta, at $198, 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 53% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Missoula one-way?

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $130. Users have also found prices from $156 and $185 on Delta and Frontier, respectively.

  • 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 September is currently the most expensive (average of $289). 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.

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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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$198Average$309FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$284Average$429FlexibilityNo cancel feeOn-time75%

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