$129 Cheap Flights from Ontario (ONT) to Missoula (MSO)

View $129 flight on Tue, Jan 6, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO)

Cheap Flights from Ontario to Missoula (ONT-MSO)

Prices were available within the past 7 days and start at $129 for one-way flights and $224 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Tue, Feb 3 - Sat, Feb 7
ONT
Ontario
MSO
Missoula
$224 Roundtrip, found 1 day ago
$224
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, Feb 3 from Ontario to Missoula, returning Sat, Feb 7, priced at $224 found 1 day ago
Alaska Airlines
Tue, Dec 16 - Mon, Jan 5
ONT
Ontario
MSO
Missoula
$234 Roundtrip, found 2 days ago
$234
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Dec 16 from Ontario to Missoula, returning Mon, Jan 5, priced at $234 found 2 days ago
Hawaiian Airlines
Sat, Feb 7 - Wed, Feb 11
ONT
Ontario
MSO
Missoula
$242 Roundtrip, found 1 day ago
$242
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Feb 7 from Ontario to Missoula, returning Wed, Feb 11, priced at $242 found 1 day ago
Hawaiian Airlines
Wed, Nov 5 - Mon, Nov 10
ONT
Ontario
MSO
Missoula
$244 Roundtrip, found 1 day ago
$244
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, Nov 5 from Ontario to Missoula, returning Mon, Nov 10, priced at $244 found 1 day ago
Hawaiian Airlines
Sat, Feb 21 - Tue, Mar 10
ONT
Ontario
MSO
Missoula
$250 Roundtrip, found 1 day ago
$250
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Feb 21 from Ontario to Missoula, returning Tue, Mar 10, priced at $250 found 1 day ago
Hawaiian Airlines
Thu, Jan 15 - Sat, Jan 17
ONT
Ontario
MSO
Missoula
$252 Roundtrip, found 15 hours ago
$252
Roundtrip
found 15 hours ago
Select Hawaiian Airlines flight, departing Thu, Jan 15 from Ontario to Missoula, returning Sat, Jan 17, priced at $252 found 15 hours ago
Hawaiian Airlines
Tue, Feb 3 - Sat, Feb 14
ONT
Ontario
MSO
Missoula
$253 Roundtrip, found 1 day ago
$253
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, Feb 3 from Ontario to Missoula, returning Sat, Feb 14, priced at $253 found 1 day ago
Delta
Sat, Nov 15 - Thu, Nov 20
ONT
Ontario
MSO
Missoula
$258 Roundtrip, found 2 days ago
$258
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 15 from Ontario to Missoula, returning Thu, Nov 20, priced at $258 found 2 days ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
ONT
Ontario
MSO
Missoula
$450 Roundtrip, found 15 hours ago
$450
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Fri, Jan 16 from Ontario to Missoula, returning Mon, Jan 19, priced at $450 found 15 hours ago
Frontier Airlines
Fri, Nov 28 - Mon, Dec 1
ONT
Ontario
MSO
Missoula
$450 Roundtrip, found 1 day ago
$450
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Nov 28 from Ontario to Missoula, returning Mon, Dec 1, priced at $450 found 1 day ago

Find the cheapest month to fly from Ontario (ONT) to Missoula (MSO)

January is typically the cheapest month to fly

From $219 - $543 per traveler.

Alternative airports near Missoula

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Missoula Intl. MSO. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $370
MSO
Missoula Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $370

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO) cost?
Lock in a cheap one-way flight from $129 or cheap return flight from $224 from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO)?
The cheapest month to fly from ONT to MSO is February, when there's less demand. Off-peak months are often when better flight deals are available between these airports.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO)?
To find the cheapest airline flying from ONT to MSO, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO)?
There aren't any daily nonstop flights from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from ONT to MSO?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO)?
To arrive at Missoula Intl. Airport (MSO) without delays, pick a flight that leaves Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO) last-minute?
Booking your plane ticket from ONT to MSO right before your journey is typically more expensive. But if you're flexible with your schedule, you could snag a cheap last-minute fare.
Is it cheaper to book an ONT to MSO flight and hotel package?
Securing an ONT to MSO flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our extensive range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Missoula Intl. Airport (MSO)?
In most cases, you can cancel or reschedule your ONT to MSO flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more details, visit our Customer Service portal.

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Missoula Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Roundtrip price
$224
Distance
906 mi

Book with confidence

Ontario to Missoula Flights

The cheapest times to fly from Ontario to Missoula

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Missoula are during the month of February. You can find some of the cheapest flights from Ontario to Missoula with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Missoula

Sunday is one of the best days to book for cheap flights from Ontario to Missoula: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Missoula

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Missoula in 2025. You can also book with separate airlines for your outbound and return journeys, from $129 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Missoula flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Missoula airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Ontario to Missoula Flights

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*Available to One Key members.