$448 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 9/23. 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 Australia

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Australia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$926
Brisbane
Brisbane1 stop$1,063
Perth
Perth2 stops$1,418
Townsville
Townsville2 stops$1,846
Sydney
Sydney1 stop$926
Brisbane
Brisbane1 stop$1,063
Perth
Perth2 stops$1,418
Townsville
Townsville2 stops$1,846

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

Thu, Feb 19 - Thu, Mar 12
American Airlines Logo
6:47 am - 6:55 amONT-SYD
29h 08m1 stop
American Airlines Logo
1:20 pm - 5:52 pmSYD-ONT
22h 32m2 stops
$926American Airlines
Find Deal
Thu, Jan 22 - Thu, Feb 5
American Airlines Logo
10:57 am - 9:45 amONT-SYD
27h 48m2 stops
American Airlines Logo
2:20 pm - 10:02 pmSYD-ONT
26h 42m1 stop
$940American Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 17
 Logo
8:35 am - 7:45 pmONT-SYD
18h 10m1 stop
 Logo
4:20 pm - 9:10 pmSYD-ONT
21h 50m1 stop
$1,049
Find Deal
Mon, Nov 3 - Sun, Nov 16
United Airlines Logo
6:38 pm - 7:30 amONT-BNE
18h 52m1 stop
United Airlines Logo
11:40 am - 12:37 pmBNE-ONT
18h 57m1 stop
$1,063United Airlines
Find Deal
Sat, Nov 1 - Mon, Nov 17
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
$1,064United Airlines
Find Deal
Fri, Oct 17 - Sun, Nov 2
Alaska Airlines Logo
11:07 am - 7:45 pmONT-SYD
38h 38m1 stop
Alaska Airlines Logo
9:40 pm - 11:05 amSYD-ONT
32h 25m2 stops
$1,074Alaska Airlines
Find Deal
Wed, Feb 4 - Fri, Feb 20
Alaska Airlines Logo
9:50 am - 7:45 pmONT-SYD
38h 55m1 stop
Alaska Airlines Logo
9:40 pm - 9:55 pmSYD-ONT
19h 15m1 stop
$1,075Alaska Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 21
Hawaiian Airlines Logo
11:07 am - 7:45 pmONT-SYD
38h 38m1 stop
Hawaiian Airlines Logo
9:40 pm - 12:37 pmSYD-ONT
32h 57m2 stops
$1,079Hawaiian Airlines
Find Deal
Tue, Oct 7 - Wed, Oct 22
 Logo
11:07 am - 3:40 pmONT-SYD
34h 33m1 stop
 Logo
5:20 pm - 8:37 pmSYD-ONT
21h 17m1 stop
$1,102
Find Deal
Mon, Jan 19 - Sun, Feb 1
Hawaiian Airlines Logo
9:50 am - 7:45 pmONT-SYD
38h 55m1 stop
Hawaiian Airlines Logo
9:40 pm - 9:55 pmSYD-ONT
19h 15m1 stop
$1,156Hawaiian Airlines
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 seasonApril
Cheapest flight$448
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 11% 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 8944 reviews
7.1Entertainment
7.3Comfort
6.6Food
8.1Crew
7.7Boarding
Airline reviews

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.

2.0 MediocreMartin, Aug 2025SFO - YVR
Read more United Airlines reviews

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

Boarded plane and then delayed 1.5 hours while on the plane

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.