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 49% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 6 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

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

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.

$709 Cheap Flights from Ontario to Sydney in 2026/27

Find the cheapest flights from Ontario to Sydney

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

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

17h 45m1 stop Honolulu

21:40 - 21:28SYD Sydney Kingsford Smith-ONT Ontario

18h 48m1 stop Honolulu

$1,365Multiple Airlines

Mon, 8 Feb - Tue, 16 Feb

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

17h 45m1 stop Honolulu

21:40 - 21:28SYD Sydney Kingsford Smith-ONT Ontario

18h 48m1 stop Honolulu

$1,368Multiple Airlines

Mon, 8 Feb - Sun, 7 Mar

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

18h 45m1 stop Honolulu

21:40 - 22:43SYD Sydney Kingsford Smith-ONT Ontario

20h 03m1 stop Honolulu

$1,406Multiple Airlines

Mon, 26 Oct - Sun, 8 Nov

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

18h 45m1 stop Honolulu

21:40 - 22:43SYD Sydney Kingsford Smith-ONT Ontario

20h 03m1 stop Honolulu

$1,413Multiple Airlines

Wed, 28 Oct - Tue, 17 Nov

09:55 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

38h 50m1 stop Honolulu

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

18h 43m1 stop Honolulu

$1,416Multiple Airlines

Sun, 1 Nov - Sun, 22 Nov

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

18h 45m1 stop Honolulu

21:40 - 22:43SYD Sydney Kingsford Smith-ONT Ontario

20h 03m1 stop Honolulu

$1,419Multiple Airlines

Mon, 26 Oct - Sun, 15 Nov

08:03 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

40h 42m1 stop Honolulu

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

18h 38m1 stop Honolulu

$1,423Multiple Airlines

Tue, 1 Dec - Sun, 24 Jan

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

$1,424Multiple Airlines

Wed, 21 Oct - Fri, 20 Nov

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

17h 45m1 stop Honolulu

21:40 - 21:28SYD Sydney Kingsford Smith-ONT Ontario

18h 48m1 stop Honolulu

$1,427Multiple Airlines

Wed, 3 Feb - Sun, 14 Feb

08:03 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

40h 42m1 stop Honolulu

21:40 - 21:25SYD Sydney Kingsford Smith-ONT Ontario

18h 45m1 stop Honolulu

$1,443Multiple Airlines

Tue, 1 Dec - Sun, 6 Dec

Cheap last-minute flights

Enter your travel dates to find the best prices.

18:32 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

19h 23m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,535United Airlines

Sun, 27 Sep - Mon, 12 Oct

18:32 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

19h 23m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,538United Airlines

Sun, 27 Sep - Mon, 12 Oct

16:03 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

21h 52m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,539United Airlines

Sun, 27 Sep - Mon, 12 Oct

18:32 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

19h 23m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,547United Airlines

Sun, 27 Sep - Mon, 12 Oct

05:00 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

32h 55m2 stops Denver Intl San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,555United Airlines

Mon, 28 Sep - Mon, 5 Oct

13:24 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

24h 31m2 stops Denver Intl San Francisco

11:20 - 12:46SYD Sydney Kingsford Smith-ONT Ontario

43h 26m2 stops San Francisco Denver Intl

$1,574United Airlines

Mon, 28 Sep - Mon, 5 Oct

13:52 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

24h 03m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,577Lufthansa

Sun, 27 Sep - Mon, 12 Oct

18:32 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

19h 23m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,580United Airlines

Sun, 27 Sep - Mon, 12 Oct

18:32 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

19h 23m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,586United Airlines

Sun, 27 Sep - Mon, 12 Oct

18:32 - 06:55ONT Ontario-SYD Sydney Kingsford Smith

19h 23m1 stop San Francisco

11:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,590United Airlines

Sun, 27 Sep - Mon, 12 Oct

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United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets

United Airlines

27 Sept

ONT16:03Ontario

21h 52m

1 stop

SYD06:55Sydney Kingsford Smith

13 Oct

SYD11:20Sydney Kingsford Smith

17h 03m

1 stop

ONT10:23Ontario

$1,535

United Airlines

19 Jan

ONT16:03Ontario

19h 17m

1 stop

SYD06:20Sydney Kingsford Smith

2 Feb

SYD11:50Sydney Kingsford Smith

16h 57m

1 stop

ONT09:47Ontario

$1,538

United Airlines

27 Sept

ONT16:03Ontario

21h 52m

1 stop

SYD06:55Sydney Kingsford Smith

12 Oct

SYD11:20Sydney Kingsford Smith

18h 58m

1 stop

ONT12:18Ontario

$1,539

Lufthansa flights from Ontario to Sydney

Our best Lufthansa deals on Ontario to Sydney flight tickets

Lufthansa

1 Nov

ONT16:17Ontario

22h 03m

1 stop

SYD09:20Sydney Kingsford Smith

25 Nov

SYD11:50Sydney Kingsford Smith

19h 39m

1 stop

ONT12:29Ontario

$1,539

Lufthansa

27 Sept

ONT13:52Ontario

24h 03m

1 stop

SYD06:55Sydney Kingsford Smith

12 Oct

SYD11:20Sydney Kingsford Smith

18h 58m

1 stop

ONT12:18Ontario

$1,577

Lufthansa

27 Sept

ONT18:32Ontario

19h 23m

1 stop

SYD06:55Sydney Kingsford Smith

12 Oct

SYD11:20Sydney Kingsford Smith

18h 58m

1 stop

ONT12:18Ontario

$1,601

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 8/2

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Tue 16/2

21:40-21:28

1 stop18h 48m

$1,365

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 8/2

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Sun 7/3

21:40-21:28

1 stop18h 48m

$1,368

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 26/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Sun 8/11

21:40-22:43

1 stop20h 03m

$1,406

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 28/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Tue 17/11

21:40-22:43

1 stop20h 03m

$1,413

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 1/11

09:55-19:45

1 stop38h 50m

Sydney Kingsford Smith

Sun 22/11

21:40-21:23

1 stop18h 43m

$1,416

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 26/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Sun 15/11

21:40-22:43

1 stop20h 03m

$1,419

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 1/12

08:03-19:45

1 stop40h 42m

Sydney Kingsford Smith

Sun 24/1

21:40-21:18

1 stop18h 38m

$1,423

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 21/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Fri 20/11

21:40-21:23

1 stop18h 43m

$1,424

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 3/2

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Sun 14/2

21:40-21:28

1 stop18h 48m

$1,427

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 1/12

08:03-19:45

1 stop40h 42m

Sydney Kingsford Smith

Sun 6/12

21:40-21:25

1 stop18h 45m

$1,443

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 $1,404. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,543.

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	$709
Fastest flight time	17h 45m
Direct flights	None

The best one-way flight to Sydney from Ontario in the past 72 hours is $709. The best return flight deal from Ontario to Sydney found on momondo in the last 72 hours is $1,365.

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.