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$650+ Cheap flights to Ontario

— ONT
28 Sep — 5 Oct1
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

Thu 27/820:45 -
1 stop18h 25m
Wed 9/909:31 -
1 stop40h 19m
Deal found 25/8$1,100
Thu 27/820:45 -
1 stop18h 25m
Fri 28/809:31 -
1 stop40h 19m
Deal found 24/8$1,111
Thu 10/920:45 -
1 stop18h 25m
Wed 23/909:31 -
1 stop40h 19m
Deal found 24/8$1,134
Thu 27/810:20 -
1 stop18h 52m
Mon 23/1116:17 -
1 stop22h 03m
Deal found 26/8$1,136
Mon 31/810:20 -
1 stop18h 52m
Sun 13/919:13 -
1 stop18h 42m
Deal found 27/8$1,137
Mon 31/810:20 -
1 stop18h 52m
Mon 7/919:13 -
1 stop18h 42m
Deal found 25/8$1,139
Wed 9/910:20 -
1 stop18h 52m
Sun 13/919:13 -
1 stop18h 42m
Deal found 25/8$1,140
Thu 29/1011:50 -
1 stop28h 58m
Mon 2/1105:00 -
2 stops33h 20m
Deal found 26/8$1,141
Mon 7/910:20 -
1 stop18h 52m
Sun 20/919:13 -
1 stop18h 42m
Deal found 27/8$1,176

Find flight deals to Ontario

Return from

$841

One-way from

$651

Popular in

December

Cheapest in

August

Average price

$1,055
Fiji Airways
  • Fiji Airways
  • 28/9-18/10
  • 2 total stops
  • 45h 20m total
  • Sydney to Los Angeles
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Virgin Australia
  • Virgin Australia
  • 24/9
  • 1 total stop
  • 29h 39m total
  • Sydney to Ontario
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Highest demand for flights based on searches. 6% potential increase in price ($86 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average return price).
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Average for return flights in August 2026
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Cheapflights Fare Finder

 
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 Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 10/9

10:20-18:11

1 stop24h 51m

Ontario

Wed 14/10

13:24-07:55

2 stops48h 31m

$1,211

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 29/10

11:50-20:15

1 stop26h 25m

Ontario

Mon 2/11

06:00-09:20

1 stop32h 20m

$1,311

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 8/9

10:20-12:12

1 stop18h 52m

Ontario

Sat 10/10

13:22-07:55

2 stops48h 33m

$1,904

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 8/9

10:20-12:12

1 stop18h 52m

Ontario

Wed 14/10

16:03-07:55

1 stop21h 52m

$1,910

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 1/10

10:20-12:18

1 stop18h 58m

Ontario

Thu 8/10

16:03-07:55

1 stop21h 52m

$1,979

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 8/9

10:20-12:12

1 stop18h 52m

Ontario

Thu 8/10

16:03-07:55

1 stop21h 52m

$1,985
Fastest return journey

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Mon 14/9

10:20-12:12

1 stop18h 52m

Ontario

Fri 18/9

19:13-06:55

1 stop18h 42m

$2,061

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Mon 21/9

10:20-12:12

1 stop18h 52m

Ontario

Thu 15/10

18:32-07:55

1 stop19h 23m

$2,072

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Wed 17/2

11:50-12:20

1 stop19h 30m

Ontario

Tue 2/3

18:53-09:20

1 stop19h 27m

$2,159

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 23/2

22:10-17:05

1 stop37h 55m

Ontario

Sun 7/3

22:50-15:30

2 stops45h 40m

$2,388

Flights are sorted by cheapest return flights first.

Deals found on 26/8

Showing 1-10 of 21 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

Cheapflights Insights

Everything you need to know about your flight to Ontario

Rainfall in Ontario 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

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 3 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 53 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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Users can book flights with no change fees policies with our dedicated filters. Book flights to Ontario flexibly with Cheapflights today.

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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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