ONT

$708 Find Cheap Flights to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 6/12. 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 Ontario

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights to Ontario 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 return flight deals to Ontario

Tue, 28 Oct - Wed, 5 Nov
Alaska Airlines Logo
21:40 - 17:14SYD-ONT
37h 34m1 stop
Alaska Airlines Logo
09:45 - 19:45ONT-SYD
39h 00m1 stop
$1,052Alaska Airlines
Find Deal
Sun, 15 Feb - Sun, 8 Mar
Hawaiian Airlines Logo
21:40 - 21:55SYD-ONT
19h 15m1 stop
Hawaiian Airlines Logo
09:50 - 19:45ONT-SYD
39h 55m1 stop
$1,093Hawaiian Airlines
Find Deal
Mon, 6 Oct - Sun, 19 Oct
United Airlines Logo
11:20 - 12:13SYD-ONT
18h 53m1 stop
United Airlines Logo
18:36 - 07:55ONT-SYD
19h 19m1 stop
$1,135United Airlines
Find Deal
Thu, 30 Oct - Mon, 3 Nov
United Airlines Logo
12:10 - 12:33SYD-ONT
42h 23m2 stops
United Airlines Logo
13:29 - 07:00ONT-SYD
46h 31m2 stops
$1,136United Airlines
Find Deal
Mon, 10 Nov - Fri, 14 Nov
China Airlines Logo
22:10 - 16:50SYD-ONT
37h 40m1 stop
China Airlines Logo
22:50 - 12:15ONT-SYD
42h 25m1 stop
$1,784China Airlines
Find Deal
Tue, 4 Nov - Mon, 10 Nov
China Airlines Logo
23:10 - 16:50BNE-ONT
35h 40m1 stop
China Airlines Logo
22:50 - 10:45ONT-BNE
41h 55m1 stop
$1,811China Airlines
Find Deal
Fri, 17 Oct - Thu, 23 Oct
Multiple Airlines Logo
21:55 - 18:00PER-ONT
35h 05m2 stops
Multiple Airlines Logo
00:10 - 20:40ONT-PER
29h 30m2 stops
$1,956Multiple Airlines
Find Deal
Sat, 24 Jan - Sat, 14 Feb
Multiple Airlines Logo
19:20 - 16:50MEL-ONT
40h 30m2 stops
Multiple Airlines Logo
22:50 - 12:05ONT-MEL
42h 15m1 stop
$2,013Multiple Airlines
Find Deal
Mon, 13 Oct - Mon, 27 Oct
Qatar Airways Logo
22:45 - 18:33PER-ONT
34h 48m2 stops
Qatar Airways Logo
11:59 - 12:00ONT-PER
33h 01m2 stops
$2,885Qatar Airways
Find Deal
Tue, 7 Oct - Tue, 21 Oct
Qatar Airways Logo
22:45 - 18:33PER-ONT
34h 48m2 stops
Qatar Airways Logo
10:57 - 11:55ONT-PER
33h 58m2 stops
$2,974Qatar Airways
Find Deal

Everything you should know

Cheapest return fare
$1,052
Alaska Airlines
Tue 28/10Wed 5/11
SYD - ONT • 1 stop
Cheapest one-way flight
$708
Hawaiian Airlines
Sat 6/12
SYD - ONT • 1 stop
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Booking Insights

KAYAK's insights & trends for flights to Ontario

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

How long is the flight to Ontario?

The duration of your flight to Ontario depends on your departure and arrival airports. Obviously, any flights that include a stopover will also be longer. The most popular routes to Ontario on KAYAK are from Brisbane, which takes 12h 50m, Sydney, which takes 13h 35m, Melbourne, which takes 14h 10m, and Adelaide, which takes 17h 05m.

Good to know – Book Cheap Ontario Plane Tickets

Low seasonSeptember
Cheapest flight$708
Best time to beat the crowds (3% less expensive on average)
Most popular time to fly (22% more expensive on average)
Flight from Sydney to Ontario

When to book flights to Ontario

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

FAQs - booking Ontario flights

  • How far is Ontario Airport from central Ontario?

    The distance between Ontario Airport and the city centre of Ontario is 5 km.

  • What is the name of Ontario’s airport?

    Ontario is served by Ontario Airport, also commonly referred to as Ontario or Ontario Intl. The airport code is ONT.

  • What is the cheapest day to fly to Ontario?

    Based on KAYAK data, the cheapest day to fly to Ontario is Monday where round-trip tickets can be as cheap as $1,383. On the other hand, the most expensive day to fly is Tuesday, where round-trip prices are $2,302 on average.

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

    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 to Ontario.

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

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

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

    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 Ontario 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 to Ontario?

    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 Ontario 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 Ontario?

    The cheapest time of day to fly to Ontario is generally at night, when round-trip flights cost $1,080 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,098.

Top tips for finding cheap flights to Ontario

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.

Reviews of the top airline flying to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Australia to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Ontario? 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 8926 reviews
7.7Boarding
8.1Crew
7.3Comfort
6.6Food
7.1Entertainment
Airline reviews

The flight was comfortable with the exit row and great service

10.0 ExcellentMark, Aug 2025HNL - LAX
Read more United Airlines reviews

The flight was comfortable with the exit row and great service

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

I found the staff to not be very attentive at all. When paying for Business Class you expect a certain type of service and that was not found. They were almost rude even

Ok. Get a different kosher caterer. The food was odd.

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

I really enjoyed flying with United airlines amazing experience , good customer service and great food

1.It will be better if sandwich is warm. 2.The food is too salty. 3.Breakfast needs some vegetables or fruits.

Boarded plane and then delayed 1.5 hours while on the plane

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

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