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$881+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
16 Jul — 23 Jul1
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 11 July 2025.

Return from

$1,102

One-way from

$881

Popular in

December

Cheapest in

May

Average price

$1,389
United Airlines
  • United Airlines
  • 1/8-14/8
  • 1 total stop
  • 31h 45m total
  • Sydney to Los Angeles
Search Deals
United Airlines
  • United Airlines
  • 1/8
  • 2 total stops
  • 24h 05m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($309 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($78 potential savings vs. average return price).
Search Deals
Average for return flights in July 2025
Search Deals

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 11 July 2025.

Fri 1/810:20SYD - ONT
1 stop18h 54mUnited Airlines
Thu 14/818:39ONT - SYD
1 stop19h 16mUnited Airlines
Deal found 9/7$1,318
Sun 24/809:25SYD - ONT
2 stops23h 43mDelta
Sun 31/806:05ONT - SYD
2 stops31h 30mDelta
Deal found 9/7$1,482
Tue 11/1121:40SYD - ONT
1 stop38h 34mAlaska Airlines
Wed 19/1109:45ONT - SYD
1 stop39h 00mAlaska Airlines
Deal found 9/7$1,668
Mon 20/1022:10SYD - ONT
1 stop37h 50mChina Airlines
Sat 1/1123:45ONT - SYD
1 stop42h 25mChina Airlines
Deal found 9/7$1,760

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 11 July 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

Fri 1/8

10:20-12:14

1 stop18h 54m

Ontario

Thu 14/8

18:39-06:55

1 stop19h 16m

$1,318

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 24/8

09:25-16:08

2 stops23h 43m

Ontario

Sun 31/8

06:05-06:35

2 stops31h 30m

$1,482

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 11/11

21:40-17:14

1 stop38h 34m

Ontario

Wed 19/11

09:45-19:45

1 stop39h 00m

$1,668

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 20/10

22:10-18:00

1 stop37h 50m

Ontario

Sat 1/11

23:45-12:10

1 stop42h 25m

$1,760

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 1/8

10:20-17:25

2 stops24h 05m

$881

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 25/11

14:20-15:50

3 stops44h 30m

$1,094

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 16/7

22:10-18:40

1 stop37h 30m

$1,121

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 12/12

21:40-21:55

1 stop19h 15m

$1,447

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 13/12

21:40-21:55

1 stop19h 15m

$1,449

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 23/8

10:20-12:13

1 stop18h 53m

$1,603

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 12 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

How long is the flight to Ontario?

On average, a flight from Sydney to Ontario takes 16 hours 49 minutes. Flights to Ontario from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Ontario?

The most popular airline flying from Sydney to Ontario is United Airlines.

United Airlines
United Airlines
From $697

What are the cheapest airlines that fly to Ontario?

The cheapest airline flying from Sydney to Ontario is United Airlines.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 mm per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

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 11 July 2025.
Read reviews from past customers who have flown Japan Airlines, China Airlines, andAlaska 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.
Japan Airlines
8.3
Very Good
1,512 reviews
Check prices

Crew

8.7

Boarding

8.4

Overall

8.3

Food

7.7

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Japan Airlines
8.3
Very Good
1,512 reviews
Japan Airlines
8.3
Very Good
1,512 reviews
Check prices

Crew

8.7

Boarding

8.4

Overall

8.3

Food

7.7

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
China Airlines
8.3
Very Good
744 reviews
Japan Airlines
8.3
Very Good
1,512 reviews
Check prices

Crew

8.7

Boarding

8.4

Overall

8.3

Food

7.7

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Alaska Airlines
8.0
Very Good
10,000 reviews
Japan Airlines
8.3
Very Good
1,512 reviews
Check prices

Crew

8.7

Boarding

8.4

Overall

8.3

Food

7.7

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Delta
8.0
Very Good
7,951 reviews
Japan Airlines
8.3
Very Good
1,512 reviews
Check prices

Crew

8.7

Boarding

8.4

Overall

8.3

Food

7.7

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Hawaiian Airlines
7.8
Good
2,562 reviews
Japan Airlines
8.3
Very Good
1,512 reviews
Check prices

Crew

8.7

Boarding

8.4

Overall

8.3

Food

7.7

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.

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 19 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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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.

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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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