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$623+ 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 24/10. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
1 sept. — 8 sept.1
1 adult

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 27 août 2025.

Return from

$1,093

One-way from

$623

Popular in

December

Cheapest in

May

Average price

$1,204
Fiji Airways
  • Fiji Airways
  • 23/9-30/9
  • 2 total stops
  • 35h 30m total
  • Sydney to Los Angeles
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24/10
  • 24/10
  • 1 total stop
  • 21h 17m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($310 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease ($81 potential savings vs. average return price).
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Average for return flights in August 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 27 août 2025.

dim. 2/1121:40SYD - ONT
1 stop38h 34mHawaiian Airlines
mar. 18/1109:45ONT - SYD
1 stop39h 00mHawaiian Airlines
Deal found 25/8$1,102
jeu. 30/1021:40SYD - ONT
1 stop37h 34mAlaska Airlines
mar. 18/1109:45ONT - SYD
1 stop39h 00mAlaska Airlines
Deal found 25/8$1,113
jeu. 28/810:20SYD - ONT
1 stop18h 53mUnited Airlines
mer. 10/918:50ONT - SYD
1 stop19h 05mUnited Airlines
Deal found 25/8$1,238
jeu. 30/1021:40SYD - ONT
1 stop37h 34mAlaska Airlines
jeu. 20/1109:45ONT - SYD
1 stop39h 00mAlaska Airlines
Deal found 25/8$1,292
jeu. 28/810:20SYD - ONT
1 stop18h 53mUnited Airlines
sam. 30/813:19ONT - SYD
2 stops48h 36mUnited Airlines
Deal found 24/8$1,316
sam. 25/1021:40SYD - ONT
1 stop37h 34mAlaska Airlines
mer. 29/1009:45ONT - SYD
1 stop40h 00mAlaska Airlines
Deal found 26/8$1,319

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 27 août 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

jeu. 22/1

21:40-21:55

1 stop19h 15m

Ontario

mer. 4/2

09:50-19:45

1 stop38h 55m

$1,076

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

mar. 20/1

21:40-21:55

1 stop19h 15m

Ontario

mer. 4/2

09:50-19:45

1 stop38h 55m

$1,076

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

dim. 2/11

21:40-17:14

1 stop38h 34m

Ontario

mar. 18/11

09:45-19:45

1 stop39h 00m

$1,102

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

sam. 1/11

21:40-18:14

1 stop38h 34m

Ontario

mer. 19/11

09:45-19:45

1 stop39h 00m

$1,113

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

mar. 4/11

21:40-17:14

1 stop38h 34m

Ontario

mer. 19/11

09:45-19:45

1 stop39h 00m

$1,113

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

dim. 2/11

21:40-17:14

1 stop38h 34m

Ontario

mer. 19/11

09:45-19:45

1 stop39h 00m

$1,113

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

jeu. 30/10

21:40-17:14

1 stop37h 34m

Ontario

dim. 16/11

09:45-19:45

1 stop39h 00m

$1,113

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

jeu. 30/10

21:40-17:14

1 stop37h 34m

Ontario

mer. 19/11

09:45-19:45

1 stop39h 00m

$1,113

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

sam. 1/11

21:40-18:14

1 stop38h 34m

Ontario

dim. 16/11

09:45-19:45

1 stop39h 00m

$1,113

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

mar. 4/11

21:40-17:14

1 stop38h 34m

Ontario

mar. 18/11

09:45-19:45

1 stop39h 00m

$1,113

Flights are sorted by cheapest return flights first.

Deals found on 26/8

Showing 1-10 of 24 results
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 27 août 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
8,945 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,945 reviews
United Airlines
7.4
Good
8,945 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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, Melbourne offers the quickest one-way flight (18 hours 14 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.

Can Cheapflights notify me if prices for flights to Ontario become cheaper?

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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