$395 Find Cheap Flights from Ontario to Australia

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 Australia departing on 9/16. 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

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Cheap Flights from Ontario to Australia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney2 stops$939
Brisbane
Brisbane1 stop$1,054
Perth
Perth2 stops$1,430
Townsville
Townsville2 stops$1,847
Sydney
Sydney2 stops$939
Brisbane
Brisbane1 stop$1,054
Perth
Perth2 stops$1,430
Townsville
Townsville2 stops$1,847

Book Cheap Ontario to Australia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Australia 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 Australia

Sun, Oct 19 - Fri, Oct 31
American Airlines Logo
10:09 am - 8:05 amONT-SYD
27h 56m2 stops
American Airlines Logo
11:20 am - 3:24 pmSYD-ONT
22h 04m2 stops
$939American Airlines
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Sun, Oct 19 - Fri, Oct 31
American Airlines Logo
10:09 am - 8:05 amONT-SYD
27h 56m2 stops
American Airlines Logo
1:05 pm - 6:53 pmSYD-ONT
23h 48m1 stop
$940American Airlines
Find Deal
Wed, Feb 25 - Fri, Mar 13
Hawaiian Airlines Logo
9:50 am - 7:45 pmONT-SYD
38h 55m1 stop
Hawaiian Airlines Logo
9:40 pm - 9:55 pmSYD-ONT
18h 15m1 stop
$1,022Hawaiian Airlines
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Thu, Oct 30 - Fri, Nov 21
Alaska Airlines Logo
6:11 pm - 7:45 pmONT-SYD
31h 34m2 stops
Alaska Airlines Logo
9:40 pm - 9:55 amSYD-ONT
31h 15m2 stops
$1,043Alaska Airlines
Find Deal
Tue, Sep 30 - Fri, Oct 31
Alaska Airlines Logo
10:09 am - 7:45 pmONT-SYD
40h 36m1 stop
Alaska Airlines Logo
9:40 pm - 5:14 pmSYD-ONT
37h 34m1 stop
$1,050Alaska Airlines
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Fri, Oct 31 - Fri, Nov 14
United Airlines Logo
6:38 pm - 6:30 amONT-BNE
18h 52m1 stop
United Airlines Logo
11:40 am - 12:37 pmBNE-ONT
18h 57m1 stop
$1,054United Airlines
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Thu, Feb 12 - Thu, Mar 12
Hawaiian Airlines Logo
9:50 am - 7:45 pmONT-SYD
38h 55m1 stop
Hawaiian Airlines Logo
9:40 pm - 9:55 pmSYD-ONT
18h 15m1 stop
$1,055Hawaiian Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 14
United Airlines Logo
6:38 pm - 6:30 amONT-BNE
18h 52m1 stop
United Airlines Logo
11:40 am - 12:37 pmBNE-ONT
18h 57m1 stop
$1,058United Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 28
 Logo
12:10 am - 12:05 amONT-MEL
29h 55m2 stops
 Logo
1:25 am - 5:50 pmMEL-ONT
34h 25m2 stops
$1,314
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Sun, Oct 5 - Sat, Oct 18
 Logo
12:10 am - 12:05 amONT-MEL
29h 55m2 stops
 Logo
1:25 am - 6:00 pmMEL-ONT
34h 35m2 stops
$1,354
Find Deal
Booking Insights

KAYAK's insights & trends for Ontario to Australia flights

Get data-powered insights and trends into flights from Ontario to Australia 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 Australia?

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

When flying from Ontario to Australia, 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 seasonFebruary
Cheapest flight$395
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Ontario to Sydney

FAQs - booking Australia flights

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

    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 Australia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Australia 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 Australia?

    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 from Ontario to Australia with an airline and back with another airline.

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

    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 from Ontario to Australia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Australia?

    The cheapest time of day to fly to Australia is generally in the morning, when round-trip flights cost $969 on average. Morning departures are around 26% cheaper than evening flights, on average. The most expensive time of day to fly to Australia is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,303.

Reviews of the top airline flying from Ontario to Australia

 
Need help choosing which airline to fly with from Ontario to Australia? 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 8934 reviews
6.6Food
7.3Comfort
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

2.0 MediocreAnonymous, Sep 2025SFO - MEX
Read more United Airlines reviews

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

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

Information on your arrival and departure airports

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