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$836+ 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
21 Apr — 28 Apr1
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 22 March 2026.

Fri 4/920:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Wed 16/908:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 22/3$1,095
Thu 10/920:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Sat 26/908:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 20/3$1,099
Thu 27/820:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Mon 28/908:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 18/3$1,164
Sat 29/820:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Wed 30/908:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 18/3$1,206
Thu 3/920:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Wed 14/1009:00
ONT
-
SYD
1 stop39h 50m
Multiple Airlines
Deal found 18/3$1,213
Thu 6/820:45
SYD
-
ONT
1 stop18h 02m
Multiple Airlines
Mon 24/808:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 18/3$1,240
Fri 6/1121:40
SYD
-
ONT
1 stop18h 48m
Multiple Airlines
Wed 18/1109:00
ONT
-
SYD
1 stop39h 45m
Multiple Airlines
Deal found 18/3$1,288
Wed 6/510:20
SYD
-
ONT
1 stop16h 21m
United Airlines
Wed 27/518:39
ONT
-
SYD
1 stop19h 16m
United Airlines
Deal found 21/3$1,291
Tue 5/510:20
SYD
-
ONT
1 stop16h 21m
United Airlines
Tue 12/506:00
ONT
-
SYD
2 stops31h 55m
United Airlines
Deal found 20/3$1,297
Wed 6/510:20
SYD
-
ONT
1 stop16h 21m
United Airlines
Mon 11/518:59
ONT
-
SYD
1 stop18h 56m
United Airlines
Deal found 21/3$1,298
Tue 2/610:20
SYD
-
ONT
1 stop18h 52m
United Airlines
Sat 20/605:45
ONT
-
SYD
2 stops56h 10m
United Airlines
Deal found 19/3$1,303
Wed 13/510:20
SYD
-
ONT
1 stop24h 32m
United Airlines
Wed 20/518:59
ONT
-
SYD
1 stop18h 56m
United Airlines
Deal found 18/3$1,304

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 22 March 2026.

Return from

$931

One-way from

$836

Popular in

December

Cheapest in

August

Average price

$1,136
Fiji Airways
  • Fiji Airways
  • 17/6-25/6
  • 2 total stops
  • 46h 05m total
  • Sydney to Los Angeles
Search Deals
United Airlines
  • United Airlines
  • 4/5
  • 1 total stop
  • 19h 02m 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 March 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 22 March 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

Wed 3/6

10:20-12:12

1 stop18h 52m

Ontario

Wed 17/6

18:39-06:55

1 stop19h 16m

$1,297

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 6/5

10:20-20:36

2 stops27h 16m

Ontario

Wed 13/5

13:40-06:55

2 stops24h 15m

$1,298
Fastest return journey

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 7/9

10:20-12:12

1 stop18h 52m

Ontario

Sat 26/9

18:53-06:55

1 stop19h 02m

$1,374

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 17/6

10:20-17:28

2 stops24h 08m

Ontario

Sat 27/6

13:50-06:55

1 stop24h 05m

$1,378

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 28/7

20:45-11:14

2 stops31h 29m

Ontario

Thu 20/8

08:00-18:50

1 stop17h 50m

$1,547

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 6/7

10:20-20:42

2 stops27h 22m

Ontario

Sun 19/7

13:50-06:55

1 stop24h 05m

$1,604

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 3/7

10:20-12:12

1 stop18h 52m

Ontario

Tue 28/7

05:00-06:55

2 stops32h 55m

$1,667

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 3/7

10:20-12:12

1 stop18h 52m

Ontario

Fri 10/7

06:00-06:55

1 stop31h 55m

$1,757

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 20/4

10:20-12:20

1 stop19h 00m

Ontario

Sun 3/5

18:59-06:55

1 stop18h 56m

$1,936

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 5/8

22:10-18:40

1 stop37h 30m

Ontario

Fri 21/8

00:45-10:45

1 stop41h 00m

$2,181

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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

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

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 22 March 2026.
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
7.4
Good
9,455 reviews
Check prices

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

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
7.4
Good
9,455 reviews
United Airlines
7.4
Good
9,455 reviews
Check prices

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Food

6.6

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 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

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How does Cheapflights help users find flights to Ontario?

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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.

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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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