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$641+ 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 25/12. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

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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 October 2025.

Sun 2/1121:40SYD - ONT
1 stop38h 34mHawaiian Airlines
Wed 12/1109:47ONT - SYD
1 stop38h 58mHawaiian Airlines
Deal found 29/10$1,106
Tue 4/1121:40SYD - ONT
1 stop38h 34mHawaiian Airlines
Wed 19/1109:47ONT - SYD
1 stop38h 58mHawaiian Airlines
Deal found 30/10$1,113
Mon 3/1112:10SYD - ONT
1 stop19h 27mUnited Airlines
Sun 16/1118:38ONT - SYD
1 stop19h 37mUnited Airlines
Deal found 30/10$1,139
Mon 3/1112:10SYD - ONT
1 stop19h 27mUnited Airlines
Mon 17/1118:38ONT - SYD
1 stop19h 37mUnited Airlines
Deal found 31/10$1,141
Tue 4/1112:10SYD - ONT
2 stops43h 21mUnited Airlines
Wed 19/1106:05ONT - SYD
1 stop29h 55mUnited Airlines
Deal found 30/10$1,145
Sun 2/1121:40SYD - ONT
1 stop38h 34mAlaska Airlines
Sun 9/1109:47ONT - SYD
1 stop38h 58mAlaska Airlines
Deal found 30/10$1,198
Mon 3/1112:10SYD - ONT
2 stops43h 21mUnited Airlines
Fri 7/1113:29ONT - SYD
2 stops46h 31mUnited Airlines
Deal found 31/10$1,215
Fri 7/1112:10SYD - ONT
1 stop19h 27mUnited Airlines
Sat 29/1121:35ONT - SYD
2 stops38h 25mUnited Airlines
Deal found 29/10$1,217
Mon 8/1212:10SYD - ONT
1 stop19h 07mUnited Airlines
Sat 3/118:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 30/10$1,221
Thu 25/1221:40SYD - ONT
1 stop19h 28mAlaska Airlines
Thu 15/108:13ONT - SYD
1 stop40h 32mAlaska Airlines
Deal found 30/10$1,223

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 31 October 2025.

Return from

$994

One-way from

$641

Popular in

December

Cheapest in

February

Average price

$1,200
Fiji Airways
  • Fiji Airways
  • 11/11-26/11
  • 2 total stops
  • 35h 40m total
  • Sydney to Los Angeles
Search Deals
Hawaiian Airlines
  • Hawaiian Airlines
  • 25/12
  • 1 total stop
  • 19h 28m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($165 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($41 potential savings vs. average return price).
Search Deals
Average for return flights in October 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 October 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

Mon 3/11

12:10-12:37

1 stop19h 27m

Ontario

Sun 16/11

18:38-09:15

1 stop19h 37m

$1,139

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 4/11

12:10-12:31

2 stops43h 21m

Ontario

Wed 19/11

05:05-07:00

2 stops30h 55m

$1,145

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 8/12

12:10-12:17

1 stop19h 07m

Ontario

Wed 21/1

13:53-06:20

1 stop21h 27m

$1,145

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 8/11

11:50-21:49

1 stop28h 59m

Ontario

Sat 29/11

21:35-09:15

2 stops40h 40m

$1,217

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 7/11

11:50-20:44

2 stops27h 54m

Ontario

Sat 29/11

21:35-07:00

2 stops38h 25m

$1,217

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 22/11

12:10-17:34

1 stop24h 24m

Ontario

Sat 29/11

21:35-07:00

2 stops38h 25m

$1,221

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 18/11

12:10-12:37

1 stop19h 27m

Ontario

Fri 5/12

05:05-06:20

2 stops30h 15m

$1,221

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 25/12

21:40-22:08

1 stop19h 28m

$641

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 28/1

21:40-22:28

1 stop19h 48m

$880

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 10/3

21:40-21:55

1 stop18h 15m

$880

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 17 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 October 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
8,998 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

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
8,998 reviews
United Airlines
7.4
Good
8,998 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

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, Sydney Kingsford Smith offers the quickest one-way flight (16 hours 49 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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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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