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$625+ 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 18/1. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
2 jan. — 9 jan.1
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 3 december 2025.

do 4/1212:10SYD - ONT
1 stop19h 08mUnited Airlines
wo 10/1218:41ONT - SYD
1 stop19h 34mUnited Airlines
Deal found 1/12$1,139
di 2/1212:10SYD - ONT
1 stop19h 07mUnited Airlines
za 6/1213:34ONT - SYD
2 stops46h 26mUnited Airlines
Deal found 1/12$1,141
zo 7/1214:00SYD - ONT
1 stop17h 18mUnited Airlines
zo 14/1218:41ONT - SYD
1 stop19h 34mUnited Airlines
Deal found 1/12$1,214
do 25/1211:50SYD - ONT
1 stop29h 02mUnited Airlines
di 13/105:05ONT - SYD
2 stops33h 10mUnited Airlines
Deal found 2/12$1,440
do 11/1221:40SYD - ONT
1 stop17h 43mHawaiian Airlines
do 8/108:13ONT - SYD
1 stop40h 32mHawaiian Airlines
Deal found 30/11$1,740
ma 8/1212:10SYD - ONT
1 stop19h 07mUnited Airlines
ma 22/1218:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 1/12$1,753
di 9/1214:00SYD - ONT
1 stop17h 17mUnited Airlines
di 16/1206:00ONT - SYD
2 stops30h 00mUnited Airlines
Deal found 2/12$1,757
zo 7/1221:40SYD - ONT
1 stop17h 43mAlaska Airlines
ma 22/1208:00ONT - SYD
1 stop40h 45mAlaska Airlines
Deal found 2/12$1,788

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 3 december 2025.

Return from

$1,056

One-way from

$625

Popular in

December

Cheapest in

February

Average price

$1,663
Qantas Airways
  • Qantas Airways
  • 7/12-14/12
  • Nonstop
  • 29h 00m total
  • Sydney to Los Angeles
Search Deals
18/1
  • 18/1
  • 2 total stops
  • 26h 23m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($137 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 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 3 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

wo 21/1

21:40-22:28

1 stop19h 48m

Ontario

do 29/1

08:13-19:45

1 stop40h 32m

$1,059

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

do 22/1

21:40-22:28

1 stop19h 48m

Ontario

do 29/1

08:13-19:45

1 stop40h 32m

$1,059

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

zo 8/2

21:40-22:28

1 stop19h 48m

Ontario

do 19/2

08:41-19:45

1 stop40h 04m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

ma 11/5

10:20-12:20

1 stop19h 00m

Ontario

wo 20/5

18:53-06:55

1 stop19h 02m

$1,139

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

di 20/1

11:50-21:59

1 stop29h 09m

Ontario

za 24/1

18:32-06:20

1 stop40h 48m

$1,139

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

wo 15/4

10:20-12:20

1 stop19h 00m

Ontario

di 12/5

18:53-06:55

1 stop19h 02m

$1,141

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

zo 22/3

21:40-21:55

1 stop18h 15m

Ontario

di 31/3

09:50-18:50

1 stop39h 00m

$1,207

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

vr 20/3

12:10-12:18

1 stop18h 08m

Ontario

ma 30/3

18:53-07:55

1 stop19h 02m

$1,216

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

do 22/1

21:40-22:28

1 stop19h 48m

Ontario

vr 30/1

11:53-19:45

2 stops36h 52m

$1,252

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

vr 8/5

10:20-12:20

1 stop19h 00m

Ontario

do 28/5

18:53-06:55

1 stop19h 02m

$1,290

Flights are sorted by cheapest return flights first.

Deals found on 1/12

Showing 1-10 of 22 results
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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 3 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
9,063 reviews
Check prices

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
9,063 reviews
United Airlines
7.4
Good
9,063 reviews
Check prices

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

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, Melbourne offers the quickest one-way flight (17 hours 18 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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