ONT

$782 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 4/8. 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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Flights 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

Fri, 1 Aug - Thu, 14 Aug
United Airlines Logo
10:20 - 12:14SYD-ONT
18h 54m1 stop
United Airlines Logo
18:39 - 06:55ONT-SYD
19h 16m1 stop
$1,243United Airlines
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Fri, 5 Dec - Thu, 29 Jan
Hawaiian Airlines Logo
21:40 - 21:55SYD-ONT
19h 15m1 stop
Hawaiian Airlines Logo
09:50 - 19:45ONT-SYD
38h 55m1 stop
$1,297Hawaiian Airlines
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Thu, 4 Dec - Fri, 30 Jan
Alaska Airlines Logo
21:40 - 21:55SYD-ONT
19h 15m1 stop
Alaska Airlines Logo
09:50 - 19:45ONT-SYD
38h 55m1 stop
$1,378Alaska Airlines
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Fri, 1 Aug - Thu, 14 Aug
Lufthansa Logo
10:20 - 12:14SYD-ONT
18h 54m1 stop
Lufthansa Logo
18:39 - 06:55ONT-SYD
19h 16m1 stop
$1,412Lufthansa
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Sun, 7 Dec - Fri, 30 Jan
Alaska Airlines Logo
21:40 - 21:55SYD-ONT
19h 15m1 stop
Alaska Airlines Logo
09:50 - 19:45ONT-SYD
38h 55m1 stop
$1,429Alaska Airlines
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Fri, 1 Aug - Thu, 14 Aug
Lufthansa Logo
10:20 - 12:14SYD-ONT
18h 54m1 stop
Lufthansa Logo
13:19 - 06:55ONT-SYD
24h 36m1 stop
$1,592Lufthansa
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Wed, 17 Sep - Sat, 20 Sep
China Airlines Logo
21:50 - 18:00MEL-ONT
37h 10m1 stop
China Airlines Logo
00:10 - 10:40ONT-MEL
41h 30m1 stop
$1,764China Airlines
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Sun, 3 Aug - Sat, 9 Aug
China Airlines Logo
22:50 - 18:40BNE-ONT
36h 50m1 stop
China Airlines Logo
00:45 - 10:35ONT-BNE
40h 50m1 stop
$1,772China Airlines
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Sun, 17 Aug - Thu, 21 Aug
Logo
00:30 - 18:40MEL-ONT
35h 10m2 stops
Logo
00:45 - 22:35ONT-MEL
28h 50m2 stops
$1,810
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Sun, 3 Aug - Sun, 10 Aug
Logo
00:30 - 18:40MEL-ONT
35h 10m2 stops
Logo
00:45 - 22:35ONT-MEL
28h 50m2 stops
$1,869
Find Deal
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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 30m.

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Good to know – Book Cheap Ontario Plane Tickets

Low seasonAugust
High seasonJune
Cheapest flight$782
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 $1,425. On the other hand, the most expensive day to fly is Tuesday, where round-trip prices are $2,372 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 8821 reviews
7.3Comfort
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
Airline reviews

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

10.0 ExcellentMina, June 2025SMF - SFO
Read more United Airlines reviews

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Its good expeince but in enternteiment please be like you tube the music i like or movie

I needed to make changes to my flights. When I called customer service, they assisted me with care professionalism.

A bit rush for transit. Food and entertainment are not available

Wonderful and fast TSA checkpoint. The line was fast and our gate was close by

The gate was too far away for the connecting flight

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)

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