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$854+ 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 17/2. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
19 Dec — 26 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 19 November 2025.

Thu 27/1121:40SYD - ONT
1 stop17h 51mHawaiian Airlines
Thu 25/1208:00ONT - SYD
1 stop40h 45mHawaiian Airlines
Deal found 16/11$1,762
Fri 5/1221:40SYD - ONT
1 stop17h 43mHawaiian Airlines
Thu 5/312:02ONT - SYD
2 stops36h 43mHawaiian Airlines
Deal found 18/11$1,838
Fri 5/1221:40SYD - ONT
1 stop17h 43mAlaska Airlines
Thu 5/308:41ONT - SYD
1 stop40h 04mAlaska Airlines
Deal found 18/11$1,931
Tue 25/1121:40SYD - ONT
1 stop17h 51mAlaska Airlines
Fri 5/1212:13ONT - SYD
2 stops36h 32mAlaska Airlines
Deal found 18/11$1,939
Thu 27/1121:40SYD - ONT
1 stop17h 51mAlaska Airlines
Thu 4/1212:13ONT - SYD
2 stops36h 32mAlaska Airlines
Deal found 16/11$1,947
Sat 22/1121:40SYD - ONT
1 stop17h 51mAlaska Airlines
Sun 7/1206:00ONT - SYD
2 stops42h 45mAlaska Airlines
Deal found 17/11$1,954
Sun 14/1221:40SYD - ONT
1 stop19h 03mHawaiian Airlines
Sun 21/1208:00ONT - SYD
1 stop40h 45mHawaiian Airlines
Deal found 15/11$1,996
Thu 25/1221:40SYD - ONT
1 stop19h 28mHawaiian Airlines
Tue 20/108:13ONT - SYD
1 stop40h 32mHawaiian Airlines
Deal found 17/11$2,042
Thu 25/1221:40SYD - ONT
1 stop19h 28mHawaiian Airlines
Thu 15/108:13ONT - SYD
1 stop40h 32mHawaiian Airlines
Deal found 17/11$2,099
Mon 17/1122:10SYD - ONT
1 stop37h 40mChina Airlines
Sun 30/1122:50ONT - SYD
1 stop42h 25mChina Airlines
Deal found 16/11$2,102
Sat 6/1221:40SYD - ONT
1 stop17h 43mAlaska Airlines
Fri 9/116:03ONT - SYD
2 stops56h 42mAlaska Airlines
Deal found 18/11$2,115
Wed 19/1122:10SYD - ONT
1 stop37h 40mChina Airlines
Tue 25/1122:50ONT - SYD
1 stop42h 25mChina Airlines
Deal found 18/11$2,155

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 19 November 2025.

Return from

$1,096

One-way from

$865

Popular in

December

Cheapest in

February

Average price

$1,247
Fiji Airways
  • Fiji Airways
  • 22/2-3/3
  • 2 total stops
  • 44h 00m total
  • Sydney to Los Angeles
Search Deals
Hawaiian Airlines
  • Hawaiian Airlines
  • 5/2
  • 1 total stop
  • 19h 48m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($133 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($36 potential savings vs. average return price).
Search Deals
Average for return flights in November 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 19 November 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 12/1

12:10-11:18

1 stop18h 08m

Ontario

Sun 25/1

13:53-06:20

1 stop21h 27m

$1,934

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 5/12

21:40-20:23

1 stop17h 43m

Ontario

Tue 13/1

08:13-19:45

1 stop40h 32m

$2,036

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 31/1

19:40-16:50

2 stops40h 10m

Ontario

Sat 28/2

22:50-12:15

1 stop42h 25m

$2,038

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 28/1

22:10-16:50

1 stop37h 40m

Ontario

Sat 14/2

22:50-16:30

2 stops46h 40m

$2,055

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 27/1

22:10-16:50

1 stop37h 40m

Ontario

Sat 14/2

22:50-15:30

2 stops45h 40m

$2,055

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 26/1

22:10-16:50

1 stop37h 40m

Ontario

Sat 14/2

22:50-12:15

1 stop42h 25m

$2,096

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 30/1

22:10-16:50

1 stop37h 40m

Ontario

Sat 14/2

22:50-19:45

2 stops49h 55m

$2,119

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 22/11

21:40-20:31

1 stop17h 51m

Ontario

Sun 30/11

07:50-19:45

1 stop40h 55m

$2,232

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 30/4

21:40-10:53

2 stops30h 13m

$951

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 1/5

21:40-10:53

2 stops30h 13m

$1,016

Flights are sorted by cheapest return flights first.

Deals found on 17/11

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 19 November 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
9,019 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

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
9,019 reviews
United Airlines
7.4
Good
9,019 reviews
Check prices

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

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 25 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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