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Cheap Flights from Ontario International to Sydney

Compare Ontario International to Sydney flight deals

Find the cheapest month or even day of the year to fly to Sydney

Book the best Sydney fare with no extra fees

Flight deals from Ontario International to Sydney

Looking for a cheap last-minute deal or the best return flight from Ontario International Airport to Sydney Airport? If you want to travel next month, return fares start from Rs306,559. Find the lowest prices on one-way and return tickets right here.
Sydney.Rs140,403 per passenger.Departing Tue, 18 Aug.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Ontario International on Tue, 18 Aug, arriving in Sydney.Price includes taxes and charges.From Rs140,403, select.
Sydney.Rs145,947 per passenger.Departing Mon, 19 Oct.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Ontario International on Mon, 19 Oct, arriving in Sydney.Price includes taxes and charges.From Rs145,947, select.
Sydney.Rs157,623 per passenger.Departing Sun, 20 Sep.One-way flight with United.Outbound indirect flight with United, departs from Ontario International on Sun, 20 Sep, arriving in Sydney.Price includes taxes and charges.From Rs157,623, select.
Sydney.Rs189,337 per passenger.Departing Wed, 2 Dec.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Ontario International on Wed, 2 Dec, arriving in Sydney.Price includes taxes and charges.From Rs189,337, select.
Sydney.Rs205,790 per passenger.Departing Sun, 10 Jan.One-way flight with United.Outbound indirect flight with United, departs from Ontario International on Sun, 10 Jan, arriving in Sydney.Price includes taxes and charges.From Rs205,790, select.
Sydney.Rs278,059 per passenger.Departing Tue, 4 May.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Ontario International on Tue, 4 May, arriving in Sydney.Price includes taxes and charges.From Rs278,059, select.
Sydney.Rs376,302 per passenger.Departing Tue, 24 Nov.One-way flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Tue, 24 Nov, arriving in Sydney.Price includes taxes and charges.From Rs376,302, select.
Sydney.Rs376,823 per passenger.Departing Sat, 6 Mar.One-way flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Sat, 6 Mar, arriving in Sydney.Price includes taxes and charges.From Rs376,823, select.
Sydney.Rs377,251 per passenger.Departing Tue, 20 Apr.One-way flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Tue, 20 Apr, arriving in Sydney.Price includes taxes and charges.From Rs377,251, select.
Sydney.Rs378,834 per passenger.Departing Wed, 24 Feb.One-way flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Wed, 24 Feb, arriving in Sydney.Price includes taxes and charges.From Rs378,834, select.
Sydney.Rs393,596 per passenger.Departing Sun, 18 Jul.One-way flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Sun, 18 Jul, arriving in Sydney.Price includes taxes and charges.From Rs393,596, select.
Sydney.Rs432,417 per passenger.Departing Tue, 1 Jun.One-way flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Tue, 1 Jun, arriving in Sydney.Price includes taxes and charges.From Rs432,417, select.

Find the cheapest month to fly from Ontario International to Sydney

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Sydney flights are currently cheapest in August.
Aug
from Rs140,403
Sep
from Rs157,623
Oct
from Rs145,947
Nov
from Rs376,302
Dec
from Rs189,337
Jan
from Rs205,790
Feb
from Rs378,834
Mar
from Rs376,823
Apr
from Rs377,251
May
from Rs278,059
Jun
from Rs432,417
Jul
from Rs393,596

Ontario International to Sydney: Alternative routes

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

Sydney

9km from central Sydney
ClosestCheapest
from Rs140,403
Search flights

Wollongong

86km from central Sydney
Search flights

Ontario to Sydney: Flight information

The things to know before you go.
Cheapest flight foundRs140,403
Cheapest month to flyAugust

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

The best price we found for a return flight from Ontario International to Sydney is Rs303,161. 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 Ontario International to Sydney. But we found flights with one or more stops from Rs303,161.
As of August 2026, there are no flights flying from Ontario International to Sydney.
The cheapest month to fly from Ontario International to Sydney is usually June.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Sydney Airport on Wednesday, 9 June 2027.
No airlines currently offer direct flights between Ontario International Airport and Sydney 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 Sydney 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 Sydney is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, United offers the cheapest flight tickets to Sydney.

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

  • Sydney is 19 hours ahead of Ontario and is in the UTC+11 timezone.

  • Get to the airport on time so you don't miss your ONT to SYD flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to prevent a last-minute sprint to your gate.

  • Be prepared for longer queues during popular months like July. Arriving up to four hours in advance for an international flight and two hours for a domestic departure will help ensure a smooth travel experience.

  • If you want to break up your flight, simply uncheck 'Direct flights only' when searching for your ticket from Ontario International Airport to Sydney Airport. These are the most popular stopovers between ONT and SYD:

    • Dallas Fort Worth International Airport

    • Houston George Bush Intercntl. Airport

    • San Francisco International Airport

Handy information about Ontario International Airport (ONT)

  • The address for ONT is 2900 E. Airport Drive.

  • 83% of flights leaving Ontario International Airport arrive at their destination according to schedule. With its solid on-time performance, you're unlikely to be delayed when flying out of ONT.

  • To get to Ontario International Airport from central Ontario, it takes about 15 minutes by car. Of course, this depends on traffic. It's approximately 10 kilometres from the airport to the city centre.

  • Planning to catch public transport? You can expect a journey time of around 45 minutes.

  • Looking for a handy hotel near ONT? If you're catching an early flight from Ontario International Airport to Sydney Airport, these stays will put you moments from check-in:

Arriving at Sydney Airport (SYD)

  • The last thing you want is a lengthy trip to your hotel if you're landing late on a Ontario International Airport to Sydney Airport flight. Reserve one of these accommodation options near SYD instead:

  • Travel at your own pace with a Sydney Airport rental car. Pick up your wheels from simba car rental, Bargain Car Rentals or Yes Drive and venture far and wide through Sydney and beyond.

  • To get the best deal, reserve your ride from Sydney Airport about two weeks before you travel.

Getting from Sydney Airport (SYD) to central Sydney

  • Sydney Airport is approximately 8 kilometres from the centre of Sydney. The drive time takes around 20 minutes.

  • Getting to the centre on public transport will take you around 15 minutes.

When to fly to Sydney Airport (SYD)

  • The quietest month for a flight from Ontario International Airport to Sydney Airport is March, while July is the busiest. Pick the best time to visit Sydney based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • The warmest month in Sydney is January, with the temperature ranging between 17ºC and 32ºC. Lock in your flights from Ontario International Airport to Sydney Airport in this month if you like this kind of weather.

  • Look for cheap tickets from ONT to SYD in July if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between 5ºC and 19ºC on average.

Explore more of Australia

  • Canberra is just one of the many places in Australia waiting to be explored once you've seen the sights of Sydney. Around 241 kilometres away to the south-west, its top attractions include National Gallery of Australia, National Portrait Gallery and Museum of Australian Democracy.

  • If you're looking to explore another major stop in Australia, head for Newcastle, roughly 121 kilometres north-east of Sydney. Merewether Beach, Nobbys Beach and Newcastle Beach are among the biggest draws.

Plan the rest of your trip from Ontario to Sydney

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.