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$694+ Cheap flights to Ontario

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/7. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
13 Aug — 20 Aug1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Ontario
Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 14 July 2026.

Thu 29/1021:40
SYD
-
ONT
1 stop17h 21m
Multiple Airlines
Fri 27/1109:00
ONT
-
SYD
1 stop39h 45m
Multiple Airlines
Deal found 10/7$1,091
Tue 18/820:45
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Tue 25/809:31
ONT
-
SYD
1 stop40h 19m
Multiple Airlines
Deal found 9/7$1,102
Tue 25/809:15
SYD
-
ONT
2 stops24h 09m
Delta
Tue 1/913:06
ONT
-
SYD
2 stops24h 44m
Delta
Deal found 11/7$1,130
Thu 27/810:20
SYD
-
ONT
2 stops51h 33m
United Airlines
Mon 31/805:00
ONT
-
SYD
2 stops32h 55m
United Airlines
Deal found 13/7$1,206
Mon 12/1011:20
SYD
-
ONT
1 stop17h 03m
United Airlines
Sun 18/1005:00
ONT
-
SYD
2 stops32h 55m
United Airlines
Deal found 12/7$1,209
Mon 20/710:20
SYD
-
ONT
1 stop24h 34m
United Airlines
Sun 26/706:00
ONT
-
SYD
1 stop31h 55m
United Airlines
Deal found 12/7$1,210
Mon 27/710:20
SYD
-
ONT
1 stop29h 17m
Lufthansa
Tue 11/813:56
ONT
-
SYD
1 stop23h 59m
Lufthansa
Deal found 9/7$1,213

Find flight deals to Ontario

Find the latest flights to Ontario in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 14 July 2026.

Return from

$919

One-way from

$694

Popular in

December

Cheapest in

August

Average price

$1,254
Fiji Airways
  • Fiji Airways
  • 9/10-9/11
  • 2 total stops
  • 44h 00m total
  • Sydney to Los Angeles
Search Deals
United Airlines
  • United Airlines
  • 27/7
  • 2 total stops
  • 43h 27m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($88 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average return price).
Search Deals
Average for return flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 14 July 2026.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 17/8

10:20-12:12

1 stop18h 52m

Ontario

Sun 30/8

19:13-06:55

1 stop18h 42m

$1,206

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 24/7

10:20-12:12

1 stop18h 52m

Ontario

Tue 28/7

13:18-06:55

2 stops24h 37m

$1,255

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 3/8

10:20-12:12

1 stop18h 52m

Ontario

Fri 7/8

13:18-06:55

2 stops24h 37m

$1,255

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 19/10

11:20-10:23

1 stop17h 03m

Ontario

Thu 12/11

16:04-09:20

1 stop22h 16m

$1,257

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 25/7

10:20-12:47

2 stops43h 27m

Ontario

Sat 1/8

06:00-06:55

1 stop31h 55m

$1,306

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 14/9

10:20-18:11

1 stop24h 51m

Ontario

Sun 27/9

18:32-06:55

1 stop19h 23m

$1,330

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 6/8

20:45-21:45

1 stop18h 00m

Ontario

Fri 21/8

09:31-18:50

1 stop40h 19m

$1,366

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 6/8

20:45-21:45

1 stop18h 00m

Ontario

Thu 20/8

19:59-18:50

2 stops29h 51m

$1,675

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 8/8

20:45-11:14

2 stops55h 29m

Ontario

Fri 21/8

09:31-18:50

1 stop40h 19m

$1,808

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 22/12

13:20-12:15

1 stop17h 55m

Ontario

Wed 6/1

06:00-09:20

2 stops32h 20m

$1,842

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight to Ontario

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 mm per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

How long is the flight to Ontario?

On average, a flight from Sydney to Ontario takes 17 hours 7 minutes. Flights to Ontario from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

FAQs about flying to Ontario

  • What airport do you fly into for flights to Ontario?

    Most people fly into Ontario (ONT) if they book a flight to Ontario. Ontario is conveniently located just 4.9 km from Ontario’s city centre.

  • Can I find cheaper flights to Ontario if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Ontario on Cheapflights that require 1 or 2 stops for potential cost savings.

  • Where does the fastest flight to Ontario depart from?

    For those looking to save time traveling to Ontario, Brisbane offers the quickest one-way flight (16 hours 17 minutes).

  • Does Ontario have car hire?

    Yes. Those touching down at Ontario can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Ontario?

    Yes. Ontario has hotels nearby for those requiring accommodations. Delta Hotels by Marriott Ontario Airport is the closest property to Ontario (0.0 km away from Ontario).

See more FAQs

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Find flights to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class flights to Ontario
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Fly with Cheapflights

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How does Cheapflights help users find flights to Ontario?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets to Ontario?

Cheapflights helps you find that perfect flight to Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to Ontario with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights to Ontario flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights to Ontario become cheaper?

Yes! Start tracking prices for Ontario flights today and get alerted when prices change. To subscribe and begin receiving alerts, click the bell icon next to the flight deals above and provide your email address.

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