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$655+ Cheap flights to Ontario

— ONT
19 Nov — 26 Nov1
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

Tue 3/1121:40 -
1 stop20h 03m
Tue 17/1109:55 -
1 stop38h 50m
Deal found 18/10$1,112
Mon 19/1011:20 -
1 stop18h 58m
Wed 4/1116:17 -
1 stop22h 03m
Deal found 15/10$1,164
Mon 19/1011:20 -
1 stop18h 58m
Tue 3/1116:17 -
1 stop22h 03m
Deal found 16/10$1,172
Thu 3/1211:50 -
1 stop16h 48m
Wed 13/114:00 -
1 stop24h 20m
Deal found 16/10$1,174
Thu 22/1011:20 -
1 stop18h 58m
Wed 4/1116:17 -
1 stop22h 03m
Deal found 19/10$1,175
Mon 19/1011:20 -
1 stop18h 58m
Tue 3/1116:17 -
1 stop22h 03m
Deal found 18/10$1,176
Thu 29/1011:50 -
1 stop26h 25m
Mon 2/1106:00 -
1 stop32h 20m
Deal found 18/10$1,178
Thu 24/1211:50 -
1 stop19h 08m
Sun 31/105:00 -
2 stops30h 20m
Deal found 14/10$1,181

Find flight deals to Ontario

Return from

$963

One-way from

$655

Popular in

December

Cheapest in

August

Average price

$1,132
Alaska Airlines
  • Alaska Airlines
  • 14/11-24/11
  • 3 total stops
  • 51h 52m total
  • Sydney to Los Angeles
Search Deals
25/2-31/12
  • 25/2-31/12
  • 1 total stop
  • 18h 48m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($97 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average return price).
Search Deals
Average for return flights in October 2026
Search Deals

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

Mon 23/11

11:50-17:56

1 stop25h 06m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$676

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Mon 26/10

10:15-20:51

2 stops28h 36m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$676

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Wed 18/11

09:15-21:40

1 stop31h 25m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$676

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Wed 3/2

09:20-21:00

2 stops30h 40m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$676

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 12/11

11:50-20:51

2 stops28h 01m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$679

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 26/11

09:10-15:59

2 stops25h 49m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$679

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 30/3

11:20-17:47

1 stop24h 27m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$679

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Sun 15/11

09:15-20:51

2 stops30h 36m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$759
Fastest return journey

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Sun 25/10

11:50-15:33

1 stop21h 43m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$759

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Sat 31/10

11:50-12:29

1 stop18h 39m

Ontario

Sat 7/11

13:29-07:00

2 stops46h 31m

$1,244

Flights are sorted by cheapest return flights first.

Deals found on 18/10

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

What are the cheapest airlines that fly to Ontario?

The cheapest airline flying from Sydney to Ontario is United Airlines.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown United Airlines to the United States. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.3
Good
10,388 reviews
Check prices

Crew

8.1

Overall

7.3

Food

6.7

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.3
Good
10,388 reviews
United Airlines
7.3
Good
10,388 reviews
Check prices

Crew

8.1

Overall

7.3

Food

6.7

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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.

  • What is the best airline to fly to Ontario?

    Based on reviews from Cheapflights users, United Airlines is rated the highest out of the airlines that fly to Ontario.

  • 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 27 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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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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