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 6 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.

$732 Cheap Flights from Ontario to Sydney in 2026

1 adult

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Find the cheapest flights from Ontario to Sydney

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

09:31 - 18:50

ONT

SYD

40h 19m

1 stop

20:45 - 22:10

SYD

ONT

18h 25m

1 stop

$1,460Multiple Airlines

Thu, 3 Sep - Sun, 20 Sep

07:00 - 18:50

ONT

SYD

17h 50m

1 stop

20:45 - 21:22

SYD

ONT

18h 37m

1 stop

$1,468Multiple Airlines

Mon, 5 Oct - Tue, 13 Oct

09:31 - 18:50

ONT

SYD

40h 19m

1 stop

20:45 - 22:10

SYD

ONT

18h 25m

1 stop

$1,490Multiple Airlines

Sun, 23 Aug - Sun, 13 Sep

09:11 - 18:50

ONT

SYD

40h 39m

1 stop

20:45 - 21:45

SYD

ONT

18h 00m

1 stop

$1,492Multiple Airlines

Tue, 30 Jun - Tue, 7 Jul

07:00 - 18:50

ONT

SYD

17h 50m

1 stop

21:40 - 21:32

SYD

ONT

18h 52m

1 stop

$1,493Multiple Airlines

Fri, 16 Oct - Sun, 1 Nov

07:00 - 19:45

ONT

SYD

18h 45m

1 stop

21:40 - 21:32

SYD

ONT

18h 52m

1 stop

$1,516Multiple Airlines

Mon, 26 Oct - Sat, 7 Nov

07:00 - 19:45

ONT

SYD

18h 45m

1 stop

21:40 - 21:32

SYD

ONT

18h 52m

1 stop

$1,517Multiple Airlines

Mon, 26 Oct - Fri, 13 Nov

09:31 - 18:50

ONT

SYD

40h 19m

1 stop

20:45 - 22:10

SYD

ONT

18h 25m

1 stop

$1,518Multiple Airlines

Wed, 26 Aug - Sun, 6 Sep

09:11 - 18:50

ONT

SYD

40h 39m

1 stop

20:45 - 22:10

SYD

ONT

18h 25m

1 stop

$1,539Multiple Airlines

Wed, 12 Aug - Tue, 25 Aug

09:31 - 18:50

ONT

SYD

40h 19m

1 stop

20:45 - 22:10

SYD

ONT

18h 25m

1 stop

$1,541Multiple Airlines

Wed, 26 Aug - Sun, 6 Sep

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets

United Airlines

1 Nov

ONT18:53Ontario

19h 22m

1 stop

SYD09:15Sydney Kingsford Smith

18 Nov

SYD11:50Sydney Kingsford Smith

28h 31m

1 stop

ONT21:21Ontario

$1,555

United Airlines

3 June

ONT18:39Ontario

19h 16m

1 stop

SYD06:55Sydney Kingsford Smith

10 June

SYD10:20Sydney Kingsford Smith

24h 36m

1 stop

ONT17:56Ontario

$1,556

United Airlines

25 May

ONT05:00Ontario

32h 55m

2 stops

SYD06:55Sydney Kingsford Smith

8 July

SYD10:20Sydney Kingsford Smith

18h 52m

1 stop

ONT12:12Ontario

$1,562

Air New Zealand flights from Ontario to Sydney

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

Air New Zealand

6 July

ONT18:39Ontario

19h 16m

1 stop

SYD06:55Sydney Kingsford Smith

13 July

SYD10:20Sydney Kingsford Smith

18h 52m

1 stop

ONT12:12Ontario

$1,545

Air New Zealand

3 June

ONT18:39Ontario

19h 16m

1 stop

SYD06:55Sydney Kingsford Smith

7 June

SYD10:20Sydney Kingsford Smith

18h 52m

1 stop

ONT12:12Ontario

$1,549

Air New Zealand

1 July

ONT18:39Ontario

19h 16m

1 stop

SYD06:55Sydney Kingsford Smith

15 July

SYD10:20Sydney Kingsford Smith

18h 52m

1 stop

ONT12:12Ontario

$1,553

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 3/9

09:31-18:50

1 stop40h 19m

Sydney Kingsford Smith

Sun 20/9

20:45-22:10

1 stop18h 25m

$1,460

Fastest return journey

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 5/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Tue 13/10

20:45-21:22

1 stop18h 37m

$1,468

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 23/8

09:31-18:50

1 stop40h 19m

Sydney Kingsford Smith

Sun 13/9

20:45-22:10

1 stop18h 25m

$1,490

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 30/6

09:11-18:50

1 stop40h 39m

Sydney Kingsford Smith

Tue 7/7

20:45-21:45

1 stop18h 00m

$1,492

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 16/10

07:00-18:50

1 stop17h 50m

Sydney Kingsford Smith

Sun 1/11

21:40-21:32

1 stop18h 52m

$1,493

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 26/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Sat 7/11

21:40-21:32

1 stop18h 52m

$1,516

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 26/10

07:00-19:45

1 stop18h 45m

Sydney Kingsford Smith

Fri 13/11

21:40-21:32

1 stop18h 52m

$1,517

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 26/8

09:31-18:50

1 stop40h 19m

Sydney Kingsford Smith

Sun 6/9

20:45-22:10

1 stop18h 25m

$1,518

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 12/8

09:11-18:50

1 stop40h 39m

Sydney Kingsford Smith

Tue 25/8

20:45-22:10

1 stop18h 25m

$1,539

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 26/8

09:31-18:50

1 stop40h 19m

Sydney Kingsford Smith

Sun 6/9

20:45-22:10

1 stop18h 25m

$1,541

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 Monday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,301. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,560.

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

Fastest flight time	18h 45m
Direct flights	None

The fastest flight from Ontario to Sydney takes 18h 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 18h 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.