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$833+ 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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
14 May — 21 May1
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 April 2026.

Thu 13/820:45
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Wed 2/907:20
ONT
-
SYD
1 stop18h 30m
Multiple Airlines
Deal found 10/4$1,328
Thu 21/520:45
SYD
-
ONT
1 stop18h 32m
Multiple Airlines
Tue 2/609:40
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Deal found 13/4$1,347
Tue 12/520:45
SYD
-
ONT
1 stop17h 25m
Multiple Airlines
Tue 19/509:40
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Deal found 12/4$1,348
Fri 1/520:45
SYD
-
ONT
1 stop17h 25m
Multiple Airlines
Wed 13/509:40
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Deal found 9/4$1,367
Tue 30/620:45
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Fri 21/807:20
ONT
-
SYD
1 stop18h 30m
Multiple Airlines
Deal found 9/4$1,389
Sun 24/520:45
SYD
-
ONT
1 stop18h 32m
Multiple Airlines
Sun 31/509:40
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Deal found 9/4$1,394
Thu 23/420:45
SYD
-
ONT
1 stop17h 25m
Multiple Airlines
Thu 4/609:40
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Deal found 10/4$1,402
Tue 9/620:45
SYD
-
ONT
1 stop18h 32m
Multiple Airlines
Fri 19/609:11
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Deal found 12/4$1,406
Tue 11/820:45
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Mon 31/807:20
ONT
-
SYD
1 stop18h 30m
Multiple Airlines
Deal found 10/4$1,411
Thu 28/520:45
SYD
-
ONT
1 stop18h 32m
Multiple Airlines
Sun 14/609:11
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Deal found 13/4$1,433
Wed 27/509:15
SYD
-
ONT
2 stops24h 02m
Delta
Wed 3/613:29
ONT
-
SYD
2 stops24h 21m
Delta
Deal found 11/4$1,436
Tue 21/420:45
SYD
-
ONT
1 stop19h 14m
Multiple Airlines
Wed 3/609:40
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Deal found 9/4$1,437

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 April 2026.

Return from

$1,003

One-way from

$823

Popular in

December

Cheapest in

August

Average price

$1,290
Fiji Airways
  • Fiji Airways
  • 24/4-27/4
  • 2 total stops
  • 35h 45m total
  • Sydney to Los Angeles
Search Deals
24/4
  • 24/4
  • 1 total stop
  • 17h 25m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($95 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 April 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 April 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

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 13/8

20:45-21:45

1 stop18h 00m

Ontario

Mon 31/8

07:20-18:50

1 stop18h 30m

$1,411

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 23/7

20:45-21:45

1 stop18h 00m

Ontario

Thu 27/8

07:20-18:50

1 stop18h 30m

$1,670

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 28/5

20:45-15:09

2 stops35h 24m

Ontario

Thu 4/6

09:40-18:50

1 stop40h 10m

$1,854

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 1/6

10:20-12:12

1 stop18h 52m

Ontario

Wed 1/7

18:39-06:55

1 stop19h 16m

$1,984

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 27/4

10:20-09:56

1 stop16h 36m

Ontario

Sun 10/5

18:59-06:55

1 stop18h 56m

$1,991

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 24/4

20:45-21:10

1 stop17h 25m

Ontario

Fri 1/5

15:26-18:50

2 stops34h 24m

$2,020

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 18/6

20:45-21:45

1 stop18h 00m

Ontario

Thu 16/7

09:11-18:50

1 stop40h 39m

$2,093

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 24/4

10:20-09:56

1 stop16h 36m

Ontario

Fri 1/5

13:30-06:55

1 stop24h 25m

$2,137

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 29/4

10:20-12:20

1 stop19h 00m

Ontario

Fri 15/5

18:59-06:55

1 stop18h 56m

$2,150
Fastest return journey

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 3/5

10:20-09:41

1 stop16h 21m

Ontario

Mon 11/5

18:59-06:55

1 stop18h 56m

$2,160

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 22 resultsSorted by cheapest first
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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 16 hours 36 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 11 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

Browse thousands of different options on Cheapflights for your next trip

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Search flights to Ontario by cabin class

Find flights to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Premium Economy Class
Economy class

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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