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 27 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).

What are the most popular airlines that fly to Ontario?

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

How long is the flight to Ontario?

On average, a flight from Sydney to Ontario takes 16 hours 57 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.

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.

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).

$688+ Cheap Flights to Ontario, California

Flights to Ontario in 2026

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 24 September 2026.

Mon 5/1011:20 -

1 stop18h 58m

Sun 18/1016:03 -

1 stop21h 52m

Deal found 24/9$1,174

Wed 7/1011:20 -

1 stop17h 03m

Mon 2/1116:17 -

1 stop22h 03m

Deal found 24/9$1,199

Thu 8/1011:20 -

1 stop18h 58m

Sun 18/1018:32 -

1 stop19h 23m

Deal found 24/9$1,200

Mon 5/1011:20 -

1 stop18h 58m

Sun 18/1016:03 -

1 stop21h 52m

Deal found 24/9$1,201

Thu 29/1011:50 -

1 stop21h 43m

Mon 2/1109:25 -

1 stop28h 55m

Deal found 22/9$1,207

Find flight deals to Ontario

Return from	$954
One-way from	$688
Popular in	December
Cheapest in	August
Average price	$1,166

Fiji Airways
21/10-28/10
2 total stops
35h 50m total
Sydney to Los Angeles

Search Deals

United Airlines
9/12-31/12
1 total stop
16h 48m total
Sydney to Ontario

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($91 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average return price).

Search Deals

Average for return flights in September 2026

Search Deals

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Mon 12/10

11:20-20:58

2 stops27h 38m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$690

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Mon 28/9

10:20-12:46

2 stops43h 26m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$690

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Wed 11/11

09:15-18:47

2 stops28h 32m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$696

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Mon 7/12

11:50-12:34

2 stops43h 44m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$696

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 12/11

11:50-20:51

2 stops28h 01m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$696

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Thu 22/10

11:20-17:36

1 stop24h 16m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$696

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 20/10

11:20-15:22

1 stop22h 02m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$696

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Tue 8/12

09:15-21:11

2 stops30h 56m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$699

Fastest return journey

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Fri 11/12

11:50-09:38

1 stop16h 48m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$776

SydneyOntario

SYD Sydney Kingsford Smith - ONT Ontario

SYDONT

Sydney Kingsford Smith

Fri 4/12

13:20-21:11

2 stops26h 51m

Ontario

Wed 31/12

00:00-18:00

Nonstop0h 00m

$781

Flights are sorted by cheapest return flights first.

Deals found on 24/9

Showing 1-10 of 23 resultsSorted by cheapest first

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.

SYD-ONT

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

Airlines

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

Reviews of airlines servicing Ontario

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

10,233 reviews

Check prices

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

10,233 reviews

United Airlines

7.4

Good

10,233 reviews

Check prices

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 27 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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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.

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$688+ Cheap flights to Ontario

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel.

Flights to Ontario in 2026

Cheapest flights to OntarioExplore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 24 September 2026.

Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 24 September 2026.

Best flights to OntarioDiscover carefully curated flight deals to Ontario that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 September 2026.

Discover carefully curated flight deals to Ontario that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 September 2026.

Last-minute flights to OntarioDiscover last-minute flight deals to Ontario. Data last updated 24 September 2026 and is based on user searches.

Discover last-minute flight deals to Ontario. Data last updated 24 September 2026 and is based on user searches.

One-way flights to OntarioSearch for one-way flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated 24 September 2026.

Search for one-way flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated 24 September 2026.

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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.

Cheapflights Insights

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

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

How long is the flight to Ontario?

On average, a flight from Sydney to Ontario takes 16 hours 57 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.

Reviews of airlines servicing Ontario

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.

FAQs about flying to Ontario

What airport do you fly into for flights to Ontario?

Can I find cheaper flights to Ontario if I am willing to have stopovers?

What is the best airline to fly to Ontario?

Where does the fastest flight to Ontario depart from?

Does Ontario have car hire?

Are there hotels close to Ontario?

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.

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Some of the lowest fares we’ve come across for flights from Ontario.

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How does Cheapflights help users find flights to Ontario?

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

Can Cheapflights find flights to Ontario with no change fees?

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

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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 24 September 2026.

Best flights to Ontario
Discover carefully curated flight deals to Ontario that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 September 2026.

Last-minute flights to Ontario
Discover last-minute flight deals to Ontario. Data last updated 24 September 2026 and is based on user searches.

One-way flights to Ontario
Search for one-way flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated 24 September 2026.