ONT - SYD

$464 Find Cheap Flights from Ontario to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Sydney departing on 8/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Sydney, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Ontario to Sydney (ONT-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Sydney

Thu, Sep 25 - Mon, Oct 6
United Airlines Logo
6:36 pm - 6:55 amONT-SYD
19h 19m1 stop
United Airlines Logo
11:20 am - 12:13 pmSYD-ONT
18h 53m1 stop
$943United Airlines
Find Deal
Sat, Aug 23 - Wed, Sep 3
United Airlines Logo
6:50 pm - 6:55 amONT-SYD
19h 05m1 stop
United Airlines Logo
10:20 am - 12:13 pmSYD-ONT
18h 53m1 stop
$950United Airlines
Find Deal
Wed, Aug 6 - Thu, Aug 21
United Airlines Logo
6:39 pm - 6:55 amONT-SYD
19h 16m1 stop
United Airlines Logo
10:20 am - 12:13 pmSYD-ONT
18h 53m1 stop
$951United Airlines
Find Deal
Fri, Aug 8 - Fri, Aug 22
United Airlines Logo
6:00 am - 6:55 amONT-SYD
31h 55m2 stops
United Airlines Logo
10:20 am - 12:13 pmSYD-ONT
18h 53m1 stop
$955United Airlines
Find Deal
Fri, Aug 1 - Fri, Aug 8
 Logo
6:58 pm - 2:40 pmONT-SYD
50h 42m2 stops
 Logo
4:20 pm - 9:27 pmSYD-ONT
22h 07m1 stop
$1,070
Find Deal
Thu, Sep 11 - Thu, Nov 6
Alaska Airlines Logo
8:35 am - 7:45 pmONT-SYD
18h 10m1 stop
Alaska Airlines Logo
9:40 pm - 5:14 pmSYD-ONT
38h 34m1 stop
$1,076Alaska Airlines
Find Deal
Fri, Aug 1 - Fri, Aug 8
 Logo
10:03 am - 7:15 pmONT-SYD
40h 12m2 stops
 Logo
4:20 pm - 9:27 pmSYD-ONT
22h 07m1 stop
$1,089
Find Deal
Sun, Sep 14 - Sun, Nov 9
Alaska Airlines Logo
10:09 am - 7:45 pmONT-SYD
40h 36m1 stop
Alaska Airlines Logo
9:40 pm - 5:14 pmSYD-ONT
38h 34m1 stop
$1,092Alaska Airlines
Find Deal
Fri, Sep 5 - Sat, Sep 20
Hawaiian Airlines Logo
8:35 am - 7:45 pmONT-SYD
18h 10m1 stop
Hawaiian Airlines Logo
9:40 pm - 10:44 amSYD-ONT
30h 04m2 stops
$1,290Hawaiian Airlines
Find Deal
Wed, Sep 3 - Thu, Sep 18
Hawaiian Airlines Logo
8:35 am - 7:45 pmONT-SYD
18h 10m1 stop
Hawaiian Airlines Logo
9:40 pm - 10:44 amSYD-ONT
30h 04m2 stops
$1,300Hawaiian Airlines
Find Deal
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KAYAK's insights & trends for Ontario to Sydney flights

Get data-powered insights and trends into flights from Ontario to Sydney to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to Sydney?

The average price of all round-trip flights from Ontario to Sydney clicked on KAYAK for each day over the last 12 months.

When flying from Ontario to Sydney, you should consider leaving on a Saturday and avoid Wednesdays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Thursdays and the most expensive ones on Tuesdays.

Good to know

Low seasonApril
High seasonMarch
Cheapest flight$464
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Ontario to Sydney

When to book flights from Ontario to Sydney

Are your dates flexible? Find out the best times to travel from Ontario to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Sydney

  • What is the cheapest flight from Ontario to Sydney?

    In the last 3 days, the lowest price for a flight from Ontario to Sydney was $464 for a one-way ticket and $943 for a round-trip.

  • Do I need a passport to fly between Ontario and Sydney?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Ontario and on arrival in Sydney.

  • Which aircraft models fly most regularly from Ontario to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Sydney?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Ontario and Sydney, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Ontario to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Ontario with another airline. Booking your flights between Ontario and SYD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8810 reviews
6.6Food
8.1Crew
7.0Entertainment
7.3Comfort
7.7Boarding
Airline reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

2.0 MediocreAnonymous, Jun 2025LAX - SEA
Read more United Airlines reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

Everything you need to know for your flight from Ontario to Sydney

Information on your arrival and departure airports

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