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$1,010+ 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
30 Jan — 6 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 31 December 2025.

Wed 31/1214:00SYD - ONT
1 stop27h 33mUnited Airlines
Tue 6/118:32ONT - SYD
1 stop19h 43mUnited Airlines
Deal found 30/12$2,374
Mon 29/1212:10SYD - ONT
1 stop24h 33mUnited Airlines
Tue 27/113:53ONT - SYD
1 stop21h 27mUnited Airlines
Deal found 28/12$2,380
Wed 31/1212:10SYD - ONT
1 stop16h 51mUnited Airlines
Thu 1/105:05ONT - SYD
2 stops33h 10mUnited Airlines
Deal found 30/12$2,448
Wed 31/1212:10SYD - ONT
1 stop16h 51mLufthansa
Wed 7/113:53ONT - SYD
1 stop21h 27mLufthansa
Deal found 30/12$2,491
Mon 29/1221:40SYD - ONT
1 stop19h 28mMultiple Airlines
Tue 27/111:53ONT - SYD
2 stops36h 52mMultiple Airlines
Deal found 28/12$2,512
Wed 31/1221:40SYD - ONT
1 stop19h 28mMultiple Airlines
Mon 5/108:00ONT - SYD
1 stop40h 45mMultiple Airlines
Deal found 30/12$2,568
Wed 31/1221:40SYD - ONT
2 stops31h 10mMultiple Airlines
Sun 4/108:00ONT - SYD
1 stop40h 45mMultiple Airlines
Deal found 30/12$2,599
Wed 31/1214:00SYD - ONT
1 stop27h 33mUnited Airlines
Mon 5/110:42ONT - SYD
1 stop24h 38mUnited Airlines
Deal found 30/12$2,605
Tue 30/1212:10SYD - ONT
1 stop16h 51mUnited Airlines
Mon 5/118:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 29/12$2,611
Tue 30/1221:40SYD - ONT
1 stop19h 28mHawaiian Airlines
Thu 1/108:00ONT - SYD
1 stop40h 45mHawaiian Airlines
Deal found 29/12$2,662
Wed 31/1212:10SYD - ONT
1 stop16h 51mUnited Airlines
Wed 7/113:53ONT - SYD
1 stop21h 27mUnited Airlines
Deal found 30/12$2,844
Tue 30/1221:40SYD - ONT
1 stop19h 28mMultiple Airlines
Thu 1/106:00ONT - SYD
2 stops42h 45mMultiple Airlines
Deal found 29/12$2,929

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 31 December 2025.

Return from

$1,049

One-way from

$1,010

Popular in

December

Cheapest in

February

Average price

$1,590
Fiji Airways
  • Fiji Airways
  • 23/1-6/2
  • 2 total stops
  • 35h 10m total
  • Sydney to Los Angeles
Search Deals
United Airlines
  • United Airlines
  • 15/1
  • 1 total stop
  • 29h 08m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($117 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 31 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

Tue 28/4

10:20-12:14

1 stop18h 54m

Ontario

Tue 5/5

18:54-06:55

1 stop19h 01m

$1,553

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 3/3

12:10-12:38

1 stop19h 28m

Ontario

Mon 23/3

18:37-09:15

1 stop20h 38m

$1,553

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 28/4

10:20-09:56

1 stop16h 36m

Ontario

Tue 12/5

18:54-06:55

1 stop19h 01m

$1,558

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 4/3

12:10-12:48

1 stop19h 38m

Ontario

Wed 18/3

18:37-09:15

1 stop20h 38m

$1,558

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 4/6

20:45-22:07

1 stop18h 22m

Ontario

Sat 27/6

07:50-18:50

1 stop18h 00m

$1,629

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 2/6

20:45-22:07

1 stop18h 22m

Ontario

Sat 27/6

07:50-18:50

1 stop18h 00m

$1,629

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 7/6

20:45-22:07

1 stop18h 22m

Ontario

Fri 26/6

07:50-18:50

1 stop18h 00m

$1,629

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 6/6

20:45-22:07

1 stop18h 22m

Ontario

Thu 25/6

07:50-18:50

1 stop18h 00m

$1,629

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 4/6

20:45-22:07

1 stop18h 22m

Ontario

Fri 26/6

07:50-18:50

1 stop18h 00m

$1,629

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 2/6

20:45-22:07

1 stop18h 22m

Ontario

Fri 26/6

07:50-18:50

1 stop18h 00m

$1,629

Flights are sorted by cheapest return flights first.

Deals found on 29/12

Showing 1-10 of 19 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 31 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
9,124 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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
7.4
Good
9,124 reviews
United Airlines
7.4
Good
9,124 reviews
Check prices

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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, Sydney Kingsford Smith offers the quickest one-way flight (16 hours 23 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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