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 51% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 5 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.

$868 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.

18:37 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

19h 43m1 stop San Francisco

11:50 - 15:33SYD Sydney Kingsford Smith-ONT Ontario

22h 43m1 stop San Francisco

$1,547Air New Zealand

Mon, 9 Nov - Mon, 16 Nov

09:00 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

39h 45m1 stop Honolulu

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

17h 48m1 stop Honolulu

$1,571Multiple Airlines

Tue, 2 Mar - Tue, 16 Mar

09:00 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

39h 45m1 stop Honolulu

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

17h 48m1 stop Honolulu

$1,574Multiple Airlines

Tue, 9 Mar - Sun, 21 Mar

15:59 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

22h 21m1 stop San Francisco

11:50 - 10:22SYD Sydney Kingsford Smith-ONT Ontario

17h 32m1 stop San Francisco

$1,590United Airlines

Mon, 1 Feb - Mon, 15 Feb

16:17 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

22h 03m1 stop San Francisco

11:50 - 20:51SYD Sydney Kingsford Smith-ONT Ontario

28h 01m2 stops San Francisco Denver Intl

$1,595United Airlines

Tue, 10 Nov - Wed, 25 Nov

06:00 - 08:30ONT Ontario-SYD Sydney Kingsford Smith

31h 30m2 stops Salt Lake City Los Angeles

10:40 - 18:30SYD Sydney Kingsford Smith-ONT Ontario

26h 50m2 stops Los Angeles Salt Lake City

$1,610Delta

Wed, 11 Nov - Thu, 26 Nov

16:03 - 10:35ONT Ontario-SYD Sydney Kingsford Smith

24h 32m2 stops San Francisco Auckland Intl

11:55 - 20:07SYD Sydney Kingsford Smith-ONT Ontario

25h 12m2 stops Auckland Intl San Francisco

$1,645Air New Zealand

Tue, 23 Mar - Mon, 26 Apr

18:37 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

19h 43m1 stop San Francisco

11:50 - 12:29SYD Sydney Kingsford Smith-ONT Ontario

19h 39m1 stop San Francisco

$1,661United Airlines

Sun, 22 Nov - Fri, 27 Nov

18:37 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

19h 43m1 stop San Francisco

09:15 - 20:51SYD Sydney Kingsford Smith-ONT Ontario

30h 36m2 stops Houston George Bush Intcntl Denver Intl

$1,666United Airlines

Sun, 22 Nov - Fri, 27 Nov

09:00 - 19:45ONT Ontario-SYD Sydney Kingsford Smith

39h 45m1 stop Honolulu

20:45 - 21:28SYD Sydney Kingsford Smith-ONT Ontario

17h 43m1 stop Honolulu

$1,674Multiple Airlines

Wed, 3 Mar - Tue, 4 May

Cheap last-minute flights

Enter your travel dates to find the best prices.

16:17 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

22h 03m1 stop San Francisco

11:50 - 12:29SYD Sydney Kingsford Smith-ONT Ontario

19h 39m1 stop San Francisco

$1,583Air New Zealand

Mon, 2 Nov - Mon, 9 Nov

16:17 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

22h 03m1 stop San Francisco

11:50 - 12:29SYD Sydney Kingsford Smith-ONT Ontario

19h 39m1 stop San Francisco

$1,590United Airlines

Mon, 2 Nov - Mon, 16 Nov

16:17 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

22h 03m1 stop San Francisco

11:50 - 17:56SYD Sydney Kingsford Smith-ONT Ontario

25h 06m1 stop San Francisco

$1,620Air New Zealand

Mon, 2 Nov - Sun, 8 Nov

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

38h 50m1 stop Honolulu

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

20h 03m1 stop Honolulu

$1,645Multiple Airlines

Thu, 5 Nov - Thu, 12 Nov

16:17 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

22h 03m1 stop San Francisco

11:50 - 12:29SYD Sydney Kingsford Smith-ONT Ontario

19h 39m1 stop San Francisco

$1,661United Airlines

Sun, 1 Nov - 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

$1,693Multiple Airlines

Sat, 31 Oct - Sat, 7 Nov

13:35 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

24h 45m1 stop San Francisco

11:50 - 12:29SYD Sydney Kingsford Smith-ONT Ontario

19h 39m1 stop San Francisco

$1,705Air New Zealand

Tue, 3 Nov - Tue, 10 Nov

16:17 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

22h 03m1 stop San Francisco

11:50 - 12:29SYD Sydney Kingsford Smith-ONT Ontario

19h 39m1 stop San Francisco

$1,730United Airlines

Sun, 1 Nov - Mon, 16 Nov

13:35 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

24h 45m1 stop San Francisco

11:50 - 12:29SYD Sydney Kingsford Smith-ONT Ontario

19h 39m1 stop San Francisco

$1,745United Airlines

Mon, 2 Nov - Mon, 16 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

$1,746Multiple Airlines

Sat, 31 Oct - Sat, 7 Nov

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Air New Zealand flights from Ontario to Sydney

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

Air New Zealand

9 Nov

ONT18:37Ontario

19h 43m

1 stop

SYD09:20Sydney Kingsford Smith

16 Nov

SYD11:50Sydney Kingsford Smith

22h 43m

1 stop

ONT15:33Ontario

$1,547

Air New Zealand

2 Nov

ONT16:17Ontario

22h 03m

1 stop

SYD09:20Sydney Kingsford Smith

9 Nov

SYD11:50Sydney Kingsford Smith

19h 39m

1 stop

ONT12:29Ontario

$1,583

Air New Zealand

2 Nov

ONT16:17Ontario

22h 03m

1 stop

SYD09:20Sydney Kingsford Smith

8 Nov

SYD11:50Sydney Kingsford Smith

25h 06m

1 stop

ONT17:56Ontario

$1,620

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets

United Airlines

1 Feb

ONT15:59Ontario

22h 21m

1 stop

SYD09:20Sydney Kingsford Smith

15 Feb

SYD11:50Sydney Kingsford Smith

17h 32m

1 stop

ONT10:22Ontario

$1,590

United Airlines

10 Nov

ONT16:17Ontario

22h 03m

1 stop

SYD09:20Sydney Kingsford Smith

25 Nov

SYD11:50Sydney Kingsford Smith

28h 01m

2 stops

ONT20:51Ontario

$1,595

United Airlines

22 Nov

ONT18:37Ontario

19h 43m

1 stop

SYD09:20Sydney Kingsford Smith

27 Nov

SYD11:50Sydney Kingsford Smith

19h 39m

1 stop

ONT12:29Ontario

$1,661

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 9/11

18:37-09:20

1 stop19h 43m

Sydney Kingsford Smith

Mon 16/11

11:50-15:33

1 stop22h 43m

$1,547

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 2/3

09:00-19:45

1 stop39h 45m

Sydney Kingsford Smith

Tue 16/3

21:40-21:28

1 stop17h 48m

$1,571

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 9/3

09:00-19:45

1 stop39h 45m

Sydney Kingsford Smith

Sun 21/3

21:40-21:28

1 stop17h 48m

$1,574

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 1/2

15:59-09:20

1 stop22h 21m

Sydney Kingsford Smith

Mon 15/2

11:50-10:22

1 stop17h 32m

$1,590

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 10/11

16:17-09:20

1 stop22h 03m

Sydney Kingsford Smith

Wed 25/11

11:50-20:51

2 stops28h 01m

$1,595

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 11/11

06:00-08:30

2 stops31h 30m

Sydney Kingsford Smith

Thu 26/11

10:40-18:30

2 stops26h 50m

$1,610

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 23/3

16:03-10:35

2 stops24h 32m

Sydney Kingsford Smith

Mon 26/4

11:55-20:07

2 stops25h 12m

$1,645

Fastest return journey

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 22/11

18:37-09:20

1 stop19h 43m

Sydney Kingsford Smith

Fri 27/11

11:50-12:29

1 stop19h 39m

$1,661

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 22/11

18:37-09:20

1 stop19h 43m

Sydney Kingsford Smith

Fri 27/11

09:15-20:51

2 stops30h 36m

$1,666

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 3/3

09:00-19:45

1 stop39h 45m

Sydney Kingsford Smith

Tue 4/5

20:45-21:28

1 stop17h 43m

$1,674

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 $1,410. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,529.

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	$868
Fastest flight time	17h 45m
Direct flights	None

The best one-way flight to Sydney from Ontario in the past 72 hours is $868. The best return flight deal from Ontario to Sydney found on momondo in the last 72 hours is $1,547.

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.