What is the cheapest airline that flies from Ontario to Sydney Kingsford Smith?

United Airlines is the most popular carrier operating from Ontario to Sydney Kingsford Smith

Which airlines fly to Sydney?

Qantas Airways, Fiji Airways and United Airlines are the top three most popular airlines that fly to Sydney from Ontario according to our data. Qantas Airways is the first choice among our users, with 47% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 7 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Sydney Kingsford Smith Airport?

Prices for flights from Ontario Airport to Sydney Kingsford Smith Airport are refreshed on a daily basis.

How old do you have to be to fly from Ontario Airport to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$695 Cheap Flights from Ontario to Sydney in 2026

Find the cheapest flights from Ontario to Sydney

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

07:00 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

21:40 - 21:42SYD Sydney Kingsford Smith-ONT Ontario

19h 02m1 stop Honolulu

$1,349Multiple Airlines

Wed, 21 Oct - Tue, 3 Nov

07:00 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

21:40 - 21:18SYD Sydney Kingsford Smith-ONT Ontario

18h 38m1 stop Honolulu

$1,357Multiple Airlines

Wed, 14 Oct - Sun, 31 Jan

07:00 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

21:40 - 21:29SYD Sydney Kingsford Smith-ONT Ontario

17h 49m1 stop Honolulu

$1,377Multiple Airlines

Mon, 19 Oct - Tue, 27 Oct

07:00 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

21:40 - 21:42SYD Sydney Kingsford Smith-ONT Ontario

19h 02m1 stop Honolulu

$1,399Multiple Airlines

Mon, 19 Oct - Tue, 10 Nov

07:00 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

21:40 - 21:23SYD Sydney Kingsford Smith-ONT Ontario

18h 43m1 stop Honolulu

$1,406Multiple Airlines

Mon, 19 Oct - Thu, 26 Nov

09:31 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

20:45 - 21:29SYD Sydney Kingsford Smith-ONT Ontario

17h 44m1 stop Honolulu

$1,407Multiple Airlines

Tue, 15 Sep - Sat, 3 Oct

09:31 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

20:45 - 21:29SYD Sydney Kingsford Smith-ONT Ontario

17h 44m1 stop Honolulu

$1,409Multiple Airlines

Tue, 15 Sep - Sat, 3 Oct

07:00 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

18h 45m1 stop Honolulu

21:40 - 21:29SYD Sydney Kingsford Smith-ONT Ontario

17h 49m1 stop Honolulu

$1,443Multiple Airlines

Mon, 26 Oct - Fri, 30 Oct

07:00 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

18h 45m1 stop Honolulu

21:40 - 21:29SYD Sydney Kingsford Smith-ONT Ontario

17h 49m1 stop Honolulu

$1,450Multiple Airlines

Mon, 26 Oct - Fri, 30 Oct

07:00 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

18h 45m1 stop Honolulu

21:40 - 21:23SYD Sydney Kingsford Smith-ONT Ontario

18h 43m1 stop Honolulu

$1,453Multiple Airlines

Fri, 30 Oct - Thu, 26 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

09:31 - 18:50ONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

20:45 - 22:10SYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,429Multiple Airlines

Sun, 6 Sep - Thu, 10 Sep

13:56 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 - 20:01SYD Sydney Kingsford Smith-ONT Ontario

26h 41m1 stop San Francisco

$1,520United Airlines

Tue, 8 Sep - Tue, 15 Sep

13:56 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 - 20:53SYD Sydney Kingsford Smith-ONT Ontario

27h 33m2 stops San Francisco Denver Intl

$1,525United Airlines

Wed, 9 Sep - Wed, 16 Sep

13:18 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

24h 37m2 stops Denver Intl San Francisco

10:20 - 14:01SYD Sydney Kingsford Smith-ONT Ontario

20h 41m1 stop San Francisco

$1,527United Airlines

Tue, 8 Sep - Tue, 22 Sep

13:56 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 - 20:01SYD Sydney Kingsford Smith-ONT Ontario

26h 41m1 stop San Francisco

$1,543Lufthansa

Sun, 6 Sep - Mon, 21 Sep

13:56 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 - 20:01SYD Sydney Kingsford Smith-ONT Ontario

26h 41m1 stop San Francisco

$1,563Lufthansa

Sun, 6 Sep - Mon, 21 Sep

13:56 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 - 20:01SYD Sydney Kingsford Smith-ONT Ontario

26h 41m1 stop San Francisco

$1,571Lufthansa

Sun, 6 Sep - Mon, 21 Sep

13:56 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 - 20:01SYD Sydney Kingsford Smith-ONT Ontario

26h 41m1 stop San Francisco

$1,582Lufthansa

Sun, 6 Sep - Mon, 21 Sep

19:13 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

18h 42m1 stop San Francisco

10:20 - 18:11SYD Sydney Kingsford Smith-ONT Ontario

24h 51m1 stop San Francisco

$1,589United Airlines

Mon, 7 Sep - Fri, 11 Sep

13:56 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 - 20:01SYD Sydney Kingsford Smith-ONT Ontario

26h 41m1 stop San Francisco

$1,590Lufthansa

Sun, 6 Sep - Mon, 21 Sep

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Delta flights from Ontario to Sydney

Our best Delta deals on Ontario to Sydney flight tickets

Delta

28 Sept

ONT06:00Ontario

31h 50m

2 stops

SYD06:50Sydney Kingsford Smith

5 Oct

SYD10:15Sydney Kingsford Smith

31h 32m

2 stops

ONT23:47Ontario

$1,464

Delta

7 Nov

ONT13:35Ontario

23h 55m

2 stops

SYD08:30Sydney Kingsford Smith

14 Nov

SYD10:40Sydney Kingsford Smith

24h 44m

2 stops

ONT16:24Ontario

$1,603

Air New Zealand flights from Ontario to Sydney

Our best Air New Zealand deals on Ontario to Sydney flight tickets

Air New Zealand

1 Feb

ONT06:00Ontario

31h 35m

2 stops

SYD08:35Sydney Kingsford Smith

24 Feb

SYD09:55Sydney Kingsford Smith

26h 52m

2 stops

ONT17:47Ontario

$1,593

Air New Zealand

1 Mar

ONT18:53Ontario

42h 42m

2 stops

SYD08:35Sydney Kingsford Smith

15 Mar

SYD17:20Sydney Kingsford Smith

40h 07m

2 stops

ONT15:27Ontario

$1,622

Air New Zealand

18 Feb

ONT13:33Ontario

24h 02m

2 stops

SYD08:35Sydney Kingsford Smith

25 Feb

SYD11:50Sydney Kingsford Smith

30h 16m

2 stops

ONT23:06Ontario

$1,683

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 21/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Tue 3/11

21:40-21:42

1 stop19h 02m

$1,349

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 14/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 31/1

21:40-21:18

1 stop18h 38m

$1,357

Fastest return journey

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 19/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Tue 27/10

21:40-21:29

1 stop17h 49m

$1,377

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 19/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Tue 10/11

21:40-21:42

1 stop19h 02m

$1,399

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 19/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Thu 26/11

21:40-21:23

1 stop18h 43m

$1,406

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 15/9

09:31-18:50

1 stop40h 19m

Sydney Kingsford Smith

Sat 3/10

20:45-21:29

1 stop17h 44m

$1,407

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 15/9

09:31-18:50

1 stop40h 19m

Sydney Kingsford Smith

Sat 3/10

20:45-21:29

1 stop17h 44m

$1,409

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 26/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Fri 30/10

21:40-21:29

1 stop17h 49m

$1,443

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 26/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Fri 30/10

21:40-21:29

1 stop17h 49m

$1,450

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Fri 30/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Thu 26/11

21:40-21:23

1 stop18h 43m

$1,453

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Wednesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,378. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,588.

When to book flights from Ontario to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Ontario to Sydney (ONT to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Sydney

Best price found	$695
Fastest flight time	17h 45m
Direct flights	None

The best one-way flight to Sydney from Ontario in the past 72 hours is $695. The best return flight deal from Ontario to Sydney found on momondo in the last 72 hours is $1,349.

The fastest flight from Ontario to Sydney takes 17h 45m

There are no direct flights from Ontario to Sydney. There are no popular flight routes from Ontario to Sydney.

Search flight deals

Frequently asked questions about flying from Ontario to Sydney

How far is Ontario to Sydney Kingsford Smith by plane?
The distance between Ontario and Sydney Kingsford Smith is about 12114.1 km. Flights usually cover this in 17h 45m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Ontario Airport to Sydney Kingsford Smith Airport?
Prices for flights from Ontario Airport to Sydney Kingsford Smith Airport are refreshed on a daily basis.
How old do you have to be to fly from Ontario Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Sydney?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Sydney . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Sydney with flexible booking policies on momondo?

Flights from Ontario to Sydney with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Sydney?

momondo helps you find the best flight between Ontario and Sydney by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Sydney right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.