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$708+ 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Flights to Ontario in 2025

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 18 September 2025.

Return from

$1,007

One-way from

$708

Popular in

December

Cheapest in

February

Average price

$1,282
Fiji Airways
  • Fiji Airways
  • 13/10-17/11
  • 2 total stops
  • 35h 25m total
  • Sydney to Los Angeles
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Hawaiian Airlines
  • Hawaiian Airlines
  • 6/12
  • 1 total stop
  • 17h 43m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($276 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($72 potential savings vs. average return price).
Search Deals
Average for return flights in September 2025
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Find flight deals to Ontario

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 18 September 2025.

Fri 31/1021:40SYD - ONT
1 stop37h 34mAlaska Airlines
Tue 4/1109:45ONT - SYD
1 stop39h 00mAlaska Airlines
Deal found 16/9$1,283
Sat 1/1121:40SYD - ONT
1 stop38h 34mAlaska Airlines
Wed 5/1109:45ONT - SYD
1 stop39h 00mAlaska Airlines
Deal found 17/9$1,285
Fri 3/1010:20SYD - ONT
1 stop18h 53mUnited Airlines
Sun 19/1020:16ONT - SYD
1 stop17h 39mUnited Airlines
Deal found 17/9$1,297
Wed 17/910:20SYD - ONT
2 stops24h 09mUnited Airlines
Tue 30/918:36ONT - SYD
1 stop19h 19mUnited Airlines
Deal found 16/9$1,310
Wed 24/910:20SYD - ONT
2 stops24h 09mUnited Airlines
Sun 28/913:53ONT - SYD
1 stop24h 02mUnited Airlines
Deal found 17/9$1,312
Sun 21/910:20SYD - ONT
2 stops27h 23mUnited Airlines
Sat 27/906:00ONT - SYD
2 stops55h 55mUnited Airlines
Deal found 16/9$1,348
Sat 20/910:20SYD - ONT
1 stop24h 17mUnited Airlines
Sat 27/906:00ONT - SYD
2 stops55h 55mUnited Airlines
Deal found 16/9$1,349
Fri 19/910:20SYD - ONT
1 stop18h 53mUnited Airlines
Tue 23/918:50ONT - SYD
1 stop19h 05mUnited Airlines
Deal found 16/9$1,385
Tue 21/1011:20SYD - ONT
1 stop18h 53mUnited Airlines
Tue 9/1213:50ONT - SYD
1 stop24h 25mUnited Airlines
Deal found 16/9$1,387
Fri 10/1011:20SYD - ONT
1 stop18h 53mUnited Airlines
Fri 24/1005:05ONT - SYD
2 stops32h 50mUnited Airlines
Deal found 16/9$1,388
Fri 3/1010:20SYD - ONT
1 stop18h 53mUnited Airlines
Fri 24/1018:27ONT - SYD
2 stops42h 33mUnited Airlines
Deal found 16/9$1,390

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 18 September 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

Sun 15/2

21:40-21:55

1 stop19h 15m

Ontario

Sun 15/3

09:50-19:45

1 stop39h 55m

$1,102

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 6/10

11:20-12:13

1 stop18h 53m

Ontario

Sun 19/10

20:16-07:55

1 stop17h 39m

$1,136

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 11/10

11:20-12:13

1 stop18h 53m

Ontario

Mon 29/12

18:39-09:15

1 stop19h 36m

$1,211

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 14/11

11:50-20:44

2 stops27h 54m

Ontario

Tue 18/11

13:33-07:00

2 stops46h 27m

$1,211

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 11/10

11:20-12:13

1 stop18h 53m

Ontario

Sat 18/10

06:00-07:55

2 stops55h 55m

$1,388

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 15/10

11:20-12:13

1 stop18h 53m

Ontario

Fri 24/10

18:27-07:00

2 stops42h 33m

$1,388

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 5/11

12:10-20:44

2 stops27h 34m

Ontario

Fri 14/11

13:29-07:00

2 stops46h 31m

$1,388

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 21/11

12:10-12:37

1 stop19h 27m

Ontario

Sat 29/11

18:38-09:15

1 stop19h 37m

$1,390

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 16/2

12:10-12:18

1 stop19h 08m

Ontario

Mon 16/3

19:15-09:15

1 stop20h 00m

$1,390

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 11/12

12:10-12:17

1 stop19h 07m

Ontario

Tue 30/12

18:39-09:15

1 stop19h 36m

$1,390

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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 18 September 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
8,926 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

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
8,926 reviews
United Airlines
7.4
Good
8,926 reviews
Check prices

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

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, 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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