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.

$714 Cheap Flights from Ontario to Sydney in 2026

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.

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

$1,513United Airlines

Wed, 4 Nov - Wed, 11 Nov

18:32 - 07:55ONT Ontario-SYD Sydney Kingsford Smith

19h 23m1 stop San Francisco

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

25h 06m1 stop San Francisco

$1,523United Airlines

Mon, 19 Oct - Mon, 9 Nov

16:03 - 07:55ONT Ontario-SYD Sydney Kingsford Smith

21h 52m1 stop San Francisco

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

18h 39m1 stop San Francisco

$1,525United Airlines

Tue, 20 Oct - Tue, 27 Oct

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

32h 55m2 stops Denver Intl San Francisco

10:20 - 10:23SYD Sydney Kingsford Smith-ONT Ontario

17h 03m1 stop San Francisco

$1,530United Airlines

Sun, 20 Sep - Wed, 30 Sep

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

17h 50m1 stop Honolulu

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

18h 44m1 stop Honolulu

$1,533Multiple Airlines

Sat, 10 Oct - Sat, 17 Oct

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

17h 50m1 stop Honolulu

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

18h 44m1 stop Honolulu

$1,537Multiple Airlines

Sat, 10 Oct - Fri, 23 Oct

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

$1,541Multiple Airlines

Sat, 10 Oct - Fri, 30 Oct

13:33 - 08:35ONT Ontario-SYD Sydney Kingsford Smith

24h 02m2 stops San Francisco Auckland Intl

09:55 - 23:06SYD Sydney Kingsford Smith-ONT Ontario

32h 11m2 stops Auckland Intl San Francisco

$1,547Air New Zealand

Sun, 14 Feb - Wed, 24 Feb

09:25 - 08:35ONT Ontario-SYD Sydney Kingsford Smith

28h 10m2 stops San Francisco Auckland Intl

11:50 - 17:36SYD Sydney Kingsford Smith-ONT Ontario

24h 46m2 stops Auckland Intl San Francisco

$1,548Air New Zealand

Wed, 25 Nov - Sun, 6 Dec

11:20 - 09:20ONT Ontario-SYD Sydney Kingsford Smith

27h 00m1 stop San Francisco

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

51h 30m2 stops San Francisco Denver Intl

$1,550United Airlines

Wed, 10 Feb - Wed, 24 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

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

18h 42m1 stop San Francisco

10:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,512United Airlines

Sun, 13 Sep - Mon, 28 Sep

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

18h 42m1 stop San Francisco

10:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,513United Airlines

Sun, 13 Sep - Mon, 28 Sep

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

18h 42m1 stop San Francisco

10:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,515United Airlines

Sun, 13 Sep - Mon, 28 Sep

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

18h 42m1 stop San Francisco

10:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,520United Airlines

Sun, 13 Sep - Mon, 28 Sep

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

18h 42m1 stop San Francisco

10:20 - 12:18SYD Sydney Kingsford Smith-ONT Ontario

18h 58m1 stop San Francisco

$1,523United Airlines

Sun, 13 Sep - Mon, 28 Sep

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

23h 59m1 stop San Francisco

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

20h 41m1 stop San Francisco

$1,525United Airlines

Tue, 15 Sep - Tue, 22 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

$1,530United Airlines

Tue, 15 Sep - Tue, 22 Sep

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

23h 59m1 stop San Francisco

10:20 - 12:50SYD Sydney Kingsford Smith-ONT Ontario

43h 30m2 stops San Francisco Denver Intl

$1,550United Airlines

Mon, 14 Sep - Mon, 21 Sep

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

48h 37m2 stops Denver Intl San Francisco

11:20 - 20:58SYD Sydney Kingsford Smith-ONT Ontario

27h 38m2 stops San Francisco Denver Intl

$1,551United Airlines

Tue, 15 Sep - Wed, 7 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

$1,563Multiple Airlines

Tue, 15 Sep - Sat, 3 Oct

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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

14 Feb

ONT13:33Ontario

24h 02m

2 stops

SYD08:35Sydney Kingsford Smith

24 Feb

SYD09:55Sydney Kingsford Smith

32h 11m

2 stops

ONT23:06Ontario

$1,547

Air New Zealand

25 Nov

ONT09:25Ontario

28h 10m

2 stops

SYD08:35Sydney Kingsford Smith

6 Dec

SYD11:50Sydney Kingsford Smith

24h 46m

2 stops

ONT17:36Ontario

$1,548

Air New Zealand

18 Feb

ONT13:33Ontario

24h 02m

2 stops

SYD08:35Sydney Kingsford Smith

23 Feb

SYD19:25Sydney Kingsford Smith

41h 22m

2 stops

ONT17:47Ontario

$1,644

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets

United Airlines

13 Sept

ONT19:13Ontario

18h 42m

1 stop

SYD06:55Sydney Kingsford Smith

28 Sept

SYD10:20Sydney Kingsford Smith

18h 58m

1 stop

ONT12:18Ontario

$1,512

United Airlines

4 Nov

ONT16:17Ontario

22h 03m

1 stop

SYD09:20Sydney Kingsford Smith

11 Nov

SYD11:50Sydney Kingsford Smith

19h 39m

1 stop

ONT12:29Ontario

$1,513

United Airlines

13 Sept

ONT19:13Ontario

18h 42m

1 stop

SYD06:55Sydney Kingsford Smith

28 Sept

SYD10:20Sydney Kingsford Smith

18h 58m

1 stop

ONT12:18Ontario

$1,515

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 4/11

16:17-09:20

1 stop22h 03m

Sydney Kingsford Smith

Wed 11/11

11:50-12:29

1 stop19h 39m

$1,513

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 19/10

18:32-07:55

1 stop19h 23m

Sydney Kingsford Smith

Mon 9/11

11:50-17:56

1 stop25h 06m

$1,523

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 20/10

16:03-07:55

1 stop21h 52m

Sydney Kingsford Smith

Tue 27/10

11:50-12:29

1 stop18h 39m

$1,525

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 20/9

05:00-06:55

2 stops32h 55m

Sydney Kingsford Smith

Wed 30/9

10:20-10:23

1 stop17h 03m

$1,530

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sat 10/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sat 17/10

20:45-21:29

1 stop18h 44m

$1,533

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sat 10/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Fri 23/10

20:45-21:29

1 stop18h 44m

$1,537

Fastest return journey

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sat 10/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Fri 30/10

21:40-21:29

1 stop17h 49m

$1,541

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 14/2

13:33-08:35

2 stops24h 02m

Sydney Kingsford Smith

Wed 24/2

09:55-23:06

2 stops32h 11m

$1,547

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 25/11

09:25-08:35

2 stops28h 10m

Sydney Kingsford Smith

Sun 6/12

11:50-17:36

2 stops24h 46m

$1,548

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 10/2

11:20-09:20

1 stop27h 00m

Sydney Kingsford Smith

Wed 24/2

11:50-20:20

2 stops51h 30m

$1,550

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 $1,381. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,517.

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	$714
Fastest flight time	17h 50m
Direct flights	None

The best one-way flight to Sydney from Ontario in the past 72 hours is $714. The best return flight deal from Ontario to Sydney found on momondo in the last 72 hours is $1,513.

The fastest flight from Ontario to Sydney takes 17h 50m

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 50m, 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.