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Cheap Flights from Sydney to Ontario

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Compare Sydney to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Sydney to Ontario International

Looking for a cheap last-minute deal or the best return flight from Sydney to Ontario International? Find the lowest prices on one-way and return tickets right here.
Ontario.$1,254 per passenger.Departing Fri, 2 May, returning Sun, 18 May.Return flight with Jetstar and Hawaiian Airlines.Outbound indirect flight with Jetstar, departs from Sydney on Fri, 2 May, arriving in Ontario International.Inbound indirect flight with Hawaiian Airlines, departs from Ontario International on Sun, 18 May, arriving in Sydney.Price includes taxes and charges.From $1,254, select.
Ontario.$1,303 per passenger.Departing Sat, 14 Jun, returning Sat, 20 Sep.Return flight with United.Outbound indirect flight with United, departs from Sydney on Sat, 14 Jun, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sat, 20 Sep, arriving in Sydney.Price includes taxes and charges.From $1,303, select.
Ontario.$1,303 per passenger.Departing Fri, 27 Jun, returning Sat, 12 Jul.Return flight with United.Outbound indirect flight with United, departs from Sydney on Fri, 27 Jun, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sat, 12 Jul, arriving in Sydney.Price includes taxes and charges.From $1,303, select.
Ontario.$1,304 per passenger.Departing Wed, 11 Jun, returning Wed, 25 Jun.Return flight with United.Outbound indirect flight with United, departs from Sydney on Wed, 11 Jun, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Wed, 25 Jun, arriving in Sydney.Price includes taxes and charges.From $1,304, select.
Ontario.$1,404 per passenger.Departing Fri, 27 Jun, returning Sat, 23 Aug.Return flight with United and Hawaiian Airlines.Outbound indirect flight with United, departs from Sydney on Fri, 27 Jun, arriving in Ontario International.Inbound indirect flight with Hawaiian Airlines, departs from Ontario International on Sat, 23 Aug, arriving in Sydney.Price includes taxes and charges.From $1,404, select.
Ontario.$1,425 per passenger.Departing Tue, 18 Nov, returning Tue, 2 Dec.Return flight with United.Outbound indirect flight with United, departs from Sydney on Tue, 18 Nov, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Tue, 2 Dec, arriving in Sydney.Price includes taxes and charges.From $1,425, select.
Ontario.$1,425 per passenger.Departing Mon, 2 Feb, returning Sun, 15 Feb.Return flight with United.Outbound indirect flight with United, departs from Sydney on Mon, 2 Feb, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sun, 15 Feb, arriving in Sydney.Price includes taxes and charges.From $1,425, select.
Ontario.$1,425 per passenger.Departing Sun, 15 Feb, returning Thu, 5 Mar.Return flight with United.Outbound indirect flight with United, departs from Sydney on Sun, 15 Feb, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Thu, 5 Mar, arriving in Sydney.Price includes taxes and charges.From $1,425, select.

Find the cheapest month to fly from Sydney to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Sydney to Ontario International flights are currently cheapest in May.
Apr
from $3,548
May
from $1,254
Jun
from $1,304
Jul
from $1,425
Aug
from $1,589
Sep
from $1,458
Oct
from $1,500
Nov
from $1,425
Dec
from $1,436
Jan
from $1,680
Feb
from $1,425
Mar
from $1,644

Sydney to Ontario International: Alternative routes

Compare routes from Sydney to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Sydney to Ontario: Flight information

The things to know before you go.
Cheapest flight found$1,254
Cheapest month to flyMay

Finding cheap flights from Sydney to Ontario International: Frequently asked questions

The best price we found for a return flight from Sydney to Ontario International is $1,254. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Sydney to Ontario International. But we found flights with one or more stops from $1,254.
As of April 2025, there are no flights flying from Sydney to Ontario International.
The cheapest month to fly from Sydney to Ontario International is usually April 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Sydney Airport to Ontario International Airport on Friday, 2 May 2025.
No airlines currently offer direct flights between Sydney Airport and Ontario International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Jetstar offers the cheapest flight tickets to Ontario International.

Flying from Sydney (Kingsford Smith) Airport (SYD) to Ontario International Airport (ONT): what you need to know

  • Ontario's timezone is UTC-7, making Ontario 18 hours behind Sydney.

  • Your SYD to ONT flight won't wait if you're late, so be at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • During popular months like April, you'll want to get to the airport earlier than normal. Arrive two hours before domestic departures and four hours ahead for international flights whenever you're travelling during a high season in general.

  • We make it easy to book a flight with a stopover. To see all your options for tickets from Sydney (Kingsford Smith) Airport to Ontario International Airport, uncheck 'Direct flights only.' Then, pick a flight that has a stop long enough to tour your chosen city. Stopovers between SYD and ONT include:

    • Daniel K. Inouye International Airport

    • San Francisco International Airport

    • Dallas/Fort Worth International Airport

How to find the cheapest flights from Sydney (Kingsford Smith) Airport (SYD) to Ontario International Airport (ONT)

  • The lowest price we've found for a one-way Sydney (Kingsford Smith) Airport to Ontario International Airport flight is $520. A return fare is currently $1,254. Depending on the availability when you book, these fares can change.

  • It's usually smart to book ahead of time if you're hoping to get cheap tickets from SYD to ONT. That's because airlines adjust prices based on demand, which tends to rise closer to departure.

  • Getting cheap flights from Sydney (Kingsford Smith) Airport to Ontario International Airport is more likely if you're flexible with your travel dates. Use the 'Whole month' tool to see the best prices across each month and score a great deal.

  • Picking up cheap flights from SYD to ONT is a breeze with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch as soon as a new deal comes up.

  • Discover the perfect flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Sydney (Kingsford Smith) Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and journey duration.

Handy information about Sydney (Kingsford Smith) Airport (SYD)

  • When it comes to the on-time performance of Sydney (Kingsford Smith) Airport, data shows 69.62% of flights meet their scheduled arrival time.

  • To reach Sydney (Kingsford Smith) Airport from central Sydney, it'll take around 20 minutes if you're travelling by car. Of course, this depends on traffic. It's approximately 18 kilometres from the airport to the city centre.

  • The trip when using public transport typically takes 25 minutes.

  • Get your trip off to a stress-free start by staying near SYD. Whether you're taking an early flight from Sydney (Kingsford Smith) Airport to Ontario International Airport or just don't want to be rushed, these hotels are ideal:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • You'll find ONT at 2900 E. Airport Drive.

  • From Ontario International Airport, Ontario is approximately 6 kilometres away. It takes around 10 minutes to get to the centre driving.

  • When travelling by public transport, expect a journey of about 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • The quietest month for a flight from Sydney (Kingsford Smith) Airport to Ontario International Airport is May, while August is the busiest. Choose the best time to visit Ontario based on whether you prefer a more relaxed vibe or a faster pace.

  • The warmest month in Ontario is August, with the temperature ranging between 15ºC (59ºF) and 35ºC (95ºF). Lock in your flights from Sydney (Kingsford Smith) Airport to Ontario International Airport in this month if you like this kind of weather.

  • If you like cooler conditions, look for a cheap ticket from SYD to ONT in January. Average temperatures are between 4ºC (39ºF) and 23ºC (73ºF) then.

Explore more of United States

  • Ontario has plenty going for it, but there are so many other parts of United States just waiting to be discovered. About 56 kilometres west of Ontario, a visit to Los Angeles will keep your itinerary busy. Start with leading sights like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • San Diego is another sought-after destination in United States and is around 153 kilometres south of Ontario. No journey is complete without experiencing San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

Plan the rest of your trip from Sydney to Ontario

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.