Find flights
Airlines
Travel Guide

$810+ 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 19/2. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
7 Feb — 14 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2026

Find the latest flights to Ontario in 2026, 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 8 January 2026.

Return from

$1,029

One-way from

$959

Popular in

December

Cheapest in

October

Average price

$1,276
Fiji Airways
  • Fiji Airways
  • 2/2-9/2
  • 2 total stops
  • 36h 00m total
  • Sydney to Los Angeles
Search Deals
United Airlines
  • United Airlines
  • 15/1
  • 2 total stops
  • 42h 28m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($107 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average return price).
Search Deals
Average for return flights in January 2026
Search Deals

Find flight deals to Ontario

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 8 January 2026.

Fri 27/221:40SYD - ONT
1 stop19h 35mMultiple Airlines
Tue 17/308:45ONT - SYD
1 stop41h 00mMultiple Airlines
Deal found 7/1$1,423
Fri 6/221:40SYD - ONT
1 stop19h 48mHawaiian Airlines
Fri 13/208:41ONT - SYD
1 stop40h 04mHawaiian Airlines
Deal found 7/1$1,474
Thu 22/121:40SYD - ONT
1 stop19h 48mHawaiian Airlines
Wed 4/208:13ONT - SYD
1 stop40h 32mHawaiian Airlines
Deal found 6/1$1,483
Fri 13/321:40SYD - ONT
1 stop17h 15mHawaiian Airlines
Fri 27/308:32ONT - SYD
1 stop40h 18mHawaiian Airlines
Deal found 6/1$1,544
Thu 19/212:10SYD - ONT
1 stop19h 28mUnited Airlines
Mon 23/318:37ONT - SYD
1 stop20h 38mUnited Airlines
Deal found 6/1$1,545
Mon 2/212:10SYD - ONT
1 stop18h 08mUnited Airlines
Mon 9/213:53ONT - SYD
1 stop21h 27mUnited Airlines
Deal found 7/1$1,553
Fri 17/720:45SYD - ONT
1 stop18h 35mMultiple Airlines
Fri 31/707:50ONT - SYD
1 stop18h 00mMultiple Airlines
Deal found 7/1$1,567
Sat 21/210:40SYD - ONT
2 stops30h 04mDelta
Sat 28/206:00ONT - SYD
2 stops29h 50mDelta
Deal found 7/1$1,572
Tue 9/620:45SYD - ONT
1 stop18h 22mMultiple Airlines
Sat 20/607:50ONT - SYD
1 stop18h 00mMultiple Airlines
Deal found 7/1$1,573
Sun 1/221:40SYD - ONT
1 stop19h 48mHawaiian Airlines
Fri 6/208:13ONT - SYD
1 stop40h 32mHawaiian Airlines
Deal found 7/1$1,591
Sun 1/212:10SYD - ONT
1 stop24h 33mUnited Airlines
Sat 7/218:32ONT - SYD
1 stop40h 48mUnited Airlines
Deal found 6/1$1,594

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 8 January 2026.
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

Fri 27/2

21:40-22:15

1 stop19h 35m

Ontario

Fri 6/3

08:41-19:45

1 stop40h 04m

$1,475

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 19/2

12:10-12:38

1 stop19h 28m

Ontario

Tue 24/3

18:37-09:15

1 stop20h 38m

$1,545

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 19/2

12:10-12:38

1 stop19h 28m

Ontario

Mon 23/3

18:37-09:15

1 stop20h 38m

$1,545

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 12/5

10:20-12:22

1 stop19h 02m

Ontario

Tue 26/5

18:53-06:55

1 stop19h 02m

$1,554

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 21/2

10:40-21:44

2 stops30h 04m

Ontario

Sat 28/2

06:00-06:50

2 stops29h 50m

$1,572

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 16/6

20:45-22:20

1 stop18h 35m

Ontario

Wed 1/7

07:50-18:50

1 stop18h 00m

$1,578

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 1/2

12:10-17:43

1 stop24h 33m

Ontario

Sat 7/2

18:32-06:20

1 stop40h 48m

$1,594

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 24/2

12:10-12:38

1 stop19h 28m

Ontario

Thu 19/3

18:37-09:15

1 stop20h 38m

$1,594

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 2/3

12:10-12:38

1 stop19h 28m

Ontario

Fri 13/3

13:50-06:20

2 stops22h 30m

$1,602

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 30/5

20:45-22:07

1 stop18h 22m

Ontario

Sat 15/8

07:50-18:50

1 stop18h 00m

$1,621

Flights are sorted by cheapest return flights first.

Deals found on 7/1

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 8 January 2026.
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
9,139 reviews
Check prices

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

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
9,139 reviews
United Airlines
7.4
Good
9,139 reviews
Check prices

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

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 23 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Search flights to Ontario by cabin class

Find flights to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy class

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights to Ontario?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets to Ontario?

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.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.