$440 Cheap Flights from Osaka (ITM) to Ontario (ONT)

View $440 flight on Fri, Jan 16, 2026Opens in a new window

Popular airlines from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Osaka to Ontario (ITM-ONT)

Prices were available within the past 7 days and start at $440 for one-way flights and $1,008 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Feb 5 - Sat, Feb 21
ITM
Osaka
ONT
Ontario
$1,008 Roundtrip, found 3 days ago
$1,008
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Feb 5 from Osaka to Ontario, returning Sat, Feb 21, priced at $1,008 found 3 days ago
American Airlines
Thu, Feb 19 - Fri, Mar 6
ITM
Osaka
ONT
Ontario
$1,356 Roundtrip, found 3 days ago
$1,356
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Feb 19 from Osaka to Ontario, returning Fri, Mar 6, priced at $1,356 found 3 days ago
Japan Airlines
Sat, Mar 21 - Thu, Mar 26
ITM
Osaka
ONT
Ontario
$1,724 Roundtrip, found 3 days ago
$1,724
Roundtrip
found 3 days ago
Select Japan Airlines flight, departing Sat, Mar 21 from Osaka to Ontario, returning Thu, Mar 26, priced at $1,724 found 3 days ago
All Nippon Airways
Wed, Jan 7 - Tue, Jan 13
ITM
Osaka
ONT
Ontario
$1,859 Roundtrip, found 1 day ago
$1,859
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Wed, Jan 7 from Osaka to Ontario, returning Tue, Jan 13, priced at $1,859 found 1 day ago
Japan Airlines
Wed, Jan 7 - Tue, Jan 13
ITM
Osaka
ONT
Ontario
$1,866 Roundtrip, found 1 day ago
$1,866
Roundtrip
found 1 day ago
Select Japan Airlines flight, departing Wed, Jan 7 from Osaka to Ontario, returning Tue, Jan 13, priced at $1,866 found 1 day ago
Japan Airlines
Fri, Mar 27 - Sat, Mar 28
ITM
Osaka
ONT
Ontario
$1,880 Roundtrip, found 3 days ago
$1,880
Roundtrip
found 3 days ago
Select Japan Airlines flight, departing Fri, Mar 27 from Osaka to Ontario, returning Sat, Mar 28, priced at $1,880 found 3 days ago
All Nippon Airways
Wed, Jan 7 - Tue, Jan 13
ITM
Osaka
ONT
Ontario
$1,891 Roundtrip, found 1 day ago
$1,891
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Wed, Jan 7 from Osaka to Ontario, returning Tue, Jan 13, priced at $1,891 found 1 day ago
All Nippon Airways
Sat, Mar 21 - Thu, Mar 26
ITM
Osaka
ONT
Ontario
$1,899 Roundtrip, found 3 days ago
$1,899
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Sat, Mar 21 from Osaka to Ontario, returning Thu, Mar 26, priced at $1,899 found 3 days ago
All Nippon Airways
Sat, Mar 21 - Thu, Mar 26
ITM
Osaka
ONT
Ontario
$1,930 Roundtrip, found 3 days ago
$1,930
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Sat, Mar 21 from Osaka to Ontario, returning Thu, Mar 26, priced at $1,930 found 3 days ago
American Airlines
Wed, Jan 7 - Tue, Jan 13
ITM
Osaka
ONT
Ontario
$1,938 Roundtrip, found 1 day ago
$1,938
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Jan 7 from Osaka to Ontario, returning Tue, Jan 13, priced at $1,938 found 1 day ago

Frequently asked questions

How much does a flight from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Lock in a cheap one-way flight from $440 or cheap return flight from $1,008 from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT)?
Planning your trip for February is a good way to save, as it's the cheapest month for flights between ITM and ONT. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline flying from ITM to ONT, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT)?
There are no daily nonstop flights from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from ITM to ONT?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) without delays, opt for a flight that leaves Itami Airport (ITM) 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 Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your ticket from ITM to ONT shortly before your getaway is generally more expensive. However, if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book an ITM to ONT flight and hotel package?
Securing an ITM to ONT flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our extensive range of hotels and then add flights, activities and car rentals 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 Itami Airport (ITM) to Los Angeles - Ontario Intl. Airport (ONT)?
If you reserved your ITM to ONT flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Travel information

Origin airport
Itami
Destination airport
Los Angeles - Ontario Intl.
Roundtrip price
$1,008
Distance
5737 mi

Book with confidence

Osaka to Ontario Flights

The cheapest times to fly from Osaka to Ontario

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 Osaka to Ontario are during the month of February. You can find some of the cheapest flights from Osaka to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Osaka to Ontario

Sunday is one of the best days to book for cheap flights from Osaka to Ontario: 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 Osaka to Ontario

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 Osaka to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $440 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 Osaka to Ontario 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 Osaka to Ontario 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.

 

Osaka to Ontario Flights

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*Available to One Key members.