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$1,006+ 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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
25 Jan — 1 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2025

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 26 December 2025.

Thu 25/1221:40SYD - ONT
1 stop19h 28mMultiple Airlines
Sat 27/1208:00ONT - SYD
1 stop40h 45mMultiple Airlines
Deal found 24/12$2,191
Thu 25/1221:40SYD - ONT
1 stop19h 28mHawaiian Airlines
Sat 27/1208:00ONT - SYD
1 stop40h 45mHawaiian Airlines
Deal found 24/12$2,224
Wed 24/1214:00SYD - ONT
1 stop23h 10mUnited Airlines
Sun 28/1218:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 23/12$2,352
Mon 29/1212:10SYD - ONT
1 stop16h 51mUnited Airlines
Tue 13/113:53ONT - SYD
1 stop21h 27mUnited Airlines
Deal found 24/12$2,366
Sun 28/1212:10SYD - ONT
1 stop16h 51mUnited Airlines
Tue 30/1218:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 24/12$2,442
Mon 29/1212:10SYD - ONT
1 stop16h 51mUnited Airlines
Sat 31/113:53ONT - SYD
1 stop21h 27mUnited Airlines
Deal found 26/12$2,448
Thu 25/1214:00SYD - ONT
1 stop22h 51mUnited Airlines
Fri 26/1218:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 24/12$2,449
Sun 28/1212:10SYD - ONT
1 stop16h 51mUnited Airlines
Wed 14/113:24ONT - SYD
2 stops46h 36mUnited Airlines
Deal found 24/12$2,515
Sat 27/1212:10SYD - ONT
1 stop16h 49mUnited Airlines
Sat 3/118:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 24/12$2,516
Sun 28/1221:40SYD - ONT
1 stop19h 28mMultiple Airlines
Wed 14/108:13ONT - SYD
1 stop40h 32mMultiple Airlines
Deal found 24/12$2,525
Sat 27/1221:40SYD - ONT
1 stop19h 28mMultiple Airlines
Sat 3/108:00ONT - SYD
1 stop40h 45mMultiple Airlines
Deal found 25/12$2,552
Mon 29/1221:40SYD - ONT
1 stop19h 28mMultiple Airlines
Sat 31/116:03ONT - SYD
2 stops56h 42mMultiple Airlines
Deal found 26/12$2,576

Find flight deals to Ontario

Find the latest flights to Ontario in 2025, 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 26 December 2025.

Return from

$1,052

One-way from

$1,006

Popular in

December

Cheapest in

February

Average price

$1,588
Fiji Airways
  • Fiji Airways
  • 5/2-10/2
  • 2 total stops
  • 36h 00m total
  • Sydney to Los Angeles
Search Deals
United Airlines
  • United Airlines
  • 3/2
  • 2 total stops
  • 28h 49m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($115 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($34 potential savings vs. average return price).
Search Deals
Average for return flights in December 2025
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 26 December 2025.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 20/5

10:20-12:22

1 stop19h 02m

Ontario

Sun 7/6

18:53-06:55

1 stop19h 02m

$1,553

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 2/2

12:10-11:18

1 stop18h 08m

Ontario

Mon 9/2

13:53-06:20

1 stop21h 27m

$1,553

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 18/4

20:45-22:59

1 stop19h 14m

Ontario

Wed 13/5

16:03-18:50

2 stops33h 47m

$1,580

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 21/5

20:45-23:56

2 stops20h 11m

Ontario

Sat 13/6

07:50-18:50

1 stop18h 00m

$1,594

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 16/2

12:10-12:38

1 stop19h 28m

Ontario

Thu 26/2

18:37-09:15

1 stop19h 38m

$1,598

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 18/1

12:10-11:18

1 stop18h 08m

Ontario

Mon 2/2

13:53-06:20

1 stop21h 27m

$1,598

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 25/1

12:10-11:18

1 stop18h 08m

Ontario

Sun 1/2

13:53-06:20

1 stop21h 27m

$1,598

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 2/6

20:45-22:07

1 stop18h 22m

Ontario

Thu 25/6

07:50-18:50

1 stop18h 00m

$1,613

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 12/2

21:40-22:15

1 stop19h 35m

Ontario

Tue 24/2

06:14-19:45

2 stops42h 31m

$1,623

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 23/5

20:45-22:07

1 stop18h 22m

Ontario

Sat 13/6

07:50-18:50

1 stop18h 00m

$1,628

Flights are sorted by cheapest return flights first.

Deals found on 24/12

Showing 1-10 of 20 results
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

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 26 December 2025.
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
9,115 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

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
9,115 reviews
United Airlines
7.4
Good
9,115 reviews
Check prices

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

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 19 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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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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