$693 Cheap Flights from Sydney (SYD) to Ontario (ONT)

View $693 flight on Sat, Apr 25, 2026Opens in a new window

Popular airlines from Sydney Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Sydney to Ontario (SYD-ONT)

Prices were available within the past 7 days and start at $693 for one-way flights and $901 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Feb 5 - Fri, Feb 6
SYD
Sydney
ONT
Ontario
$901 Roundtrip, found 1 hour ago
$901
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Thu, Feb 5 from Sydney to Ontario, returning Fri, Feb 6, priced at $901 found 1 hour ago
Hawaiian Airlines
Fri, Jan 9 - Tue, Jan 20
SYD
Sydney
ONT
Ontario
$917 Roundtrip, found 4 days ago
$917
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Fri, Jan 9 from Sydney to Ontario, returning Tue, Jan 20, priced at $917 found 4 days ago
Alaska Airlines
Tue, Feb 3 - Thu, Feb 12
SYD
Sydney
ONT
Ontario
$918 Roundtrip, found 8 hours ago
$918
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Tue, Feb 3 from Sydney to Ontario, returning Thu, Feb 12, priced at $918 found 8 hours ago
United
Wed, May 13 - Mon, May 25
SYD
Sydney
ONT
Ontario
$966 Roundtrip, found 4 days ago
$966
Roundtrip
found 4 days ago
Select United flight, departing Wed, May 13 from Sydney to Ontario, returning Mon, May 25, priced at $966 found 4 days ago
United
Tue, Nov 4 - Tue, Nov 11
SYD
Sydney
ONT
Ontario
$966 Roundtrip, found 1 day ago
$966
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 4 from Sydney to Ontario, returning Tue, Nov 11, priced at $966 found 1 day ago
Hawaiian Airlines
Sat, Nov 22 - Sun, Dec 7
SYD
Sydney
ONT
Ontario
$978 Roundtrip, found 4 days ago
$978
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Sat, Nov 22 from Sydney to Ontario, returning Sun, Dec 7, priced at $978 found 4 days ago
Hawaiian Airlines
Sat, Nov 22 - Tue, Dec 9
SYD
Sydney
ONT
Ontario
$993 Roundtrip, found 4 days ago
$993
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Sat, Nov 22 from Sydney to Ontario, returning Tue, Dec 9, priced at $993 found 4 days ago
Hawaiian Airlines
Sat, Jan 17 - Thu, Jan 29
SYD
Sydney
ONT
Ontario
$1,007 Roundtrip, found 4 days ago
$1,007
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Sat, Jan 17 from Sydney to Ontario, returning Thu, Jan 29, priced at $1,007 found 4 days ago
China Airlines
Wed, May 13 - Mon, May 25
SYD
Sydney
ONT
Ontario
$1,190 Roundtrip, found 4 days ago
$1,190
Roundtrip
found 4 days ago
Select China Airlines flight, departing Wed, May 13 from Sydney to Ontario, returning Mon, May 25, priced at $1,190 found 4 days ago
Air Canada
Thu, Feb 26 - Wed, Mar 4
SYD
Sydney
ONT
Ontario
$2,061 Roundtrip, found 2 days ago
$2,061
Roundtrip
found 2 days ago
Select Air Canada flight, departing Thu, Feb 26 from Sydney to Ontario, returning Wed, Mar 4, priced at $2,061 found 2 days ago

Alternative airports near Ontario

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

Select flight to John Wayne SNA. Cheapest option available. Average driving time to city center is 42 minutes. Flights from $935
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $935
Flights from Sydney (SYD) to Ontario (ONT)
Origin airport
Kingsford Smith Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Air Canada, Alaska Airlines, American Airlines, China Airlines, United
Roundtrip price
$900
Distance
7539 mi

Sydney to Ontario Flights

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

 

The best time to book a flight from Sydney to Ontario

Sunday is one of the best days to book for cheap flights from Sydney 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 Sydney 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 Sydney to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $693 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 Sydney 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 Sydney 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.

 

Frequently asked questions

How much does a flight from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Get a cheap one-way flight from $693 or cheap return flight from $901 from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT)?
Planning your getaway for February can help you save, as it's the cheapest month for flights between SYD and ONT. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from SYD to ONT. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT)?
There aren't any daily direct flights from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from SYD to ONT?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a range of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT)?
To avoid possible delays on the Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT) route, travel before 3 PM. Later flights are 22% more likely to be canceled.**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.
What airports do you fly into for Ontario from Kingsford Smith Intl. Airport (SYD)?
If you're flying on a direct flight from Kingsford Smith Intl. Airport (SYD) to Ontario, Los Angeles Intl. Airport (LAX) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your ticket from SYD to ONT shortly before your getaway is usually more expensive. However, if there's some wiggle room with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book a SYD to ONT flight and hotel package?
Booking a SYD to ONT flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our impressive range of stays and then add car rentals, flights and activities 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 Kingsford Smith Intl. Airport (SYD) to Los Angeles - Ontario Intl. Airport (ONT)?
If you reserved your SYD to ONT flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

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*Available to One Key members.