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Cheap flights from Ontario to Sydney from $555

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Sydney departing on 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Ontario to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:00 am - 6:50 am
ONT
-
SYD
31h 50m
2 stops
Delta Logo
9:15 am - 11:34 pm
SYD
-
ONT
31h 19m
2 stops
$1,003Delta
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:47 pm
SYD
-
ONT
18h 02m
1 stop
$1,009Multiple Airlines
Tue, Aug 4 - Thu, Aug 13
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:47 pm
SYD
-
ONT
18h 02m
1 stop
$1,023Multiple Airlines
Thu, Aug 6 - Tue, Aug 18
United Airlines Logo
6:49 pm - 6:55 am
ONT
-
SYD
19h 06m
1 stop
United Airlines Logo
10:20 am - 9:41 am
SYD
-
ONT
16h 21m
1 stop
$1,038United Airlines
Sun, Apr 26 - Sun, May 10
United Airlines Logo
6:49 pm - 6:55 am
ONT
-
SYD
19h 06m
1 stop
United Airlines Logo
10:20 am - 9:41 am
SYD
-
ONT
16h 21m
1 stop
$1,039United Airlines
Sun, Apr 26 - Sun, May 10
United Airlines Logo
6:49 pm - 6:55 am
ONT
-
SYD
19h 06m
1 stop
United Airlines Logo
10:20 am - 9:41 am
SYD
-
ONT
16h 21m
1 stop
$1,040United Airlines
Sun, Apr 26 - Sun, May 10
United Airlines Logo
6:49 pm - 6:55 am
ONT
-
SYD
19h 06m
1 stop
United Airlines Logo
10:20 am - 12:22 pm
SYD
-
ONT
19h 02m
1 stop
$1,041United Airlines
Sun, Apr 26 - Sun, May 10
United Airlines Logo
6:49 pm - 6:55 am
ONT
-
SYD
19h 06m
1 stop
United Airlines Logo
10:20 am - 9:41 am
SYD
-
ONT
16h 21m
1 stop
$1,042United Airlines
Sun, Apr 26 - Mon, May 11
United Airlines Logo
6:49 pm - 6:55 am
ONT
-
SYD
19h 06m
1 stop
United Airlines Logo
10:20 am - 9:41 am
SYD
-
ONT
16h 21m
1 stop
$1,044United Airlines
Sun, Apr 26 - Sun, May 10
United Airlines Logo
6:49 pm - 6:55 am
ONT
-
SYD
19h 06m
1 stop
United Airlines Logo
10:20 am - 9:41 am
SYD
-
ONT
16h 21m
1 stop
$1,045United Airlines
Sun, Apr 26 - Sun, May 10

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Apr 26
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
May 10
SYD10:20 amSydney Kingsford Smith
16h 21m
1 stop
ONT9:41 amOntario
$1,038
United Airlines
Apr 26
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
May 10
SYD10:20 amSydney Kingsford Smith
16h 21m
1 stop
ONT9:41 amOntario
$1,039
United Airlines
Apr 26
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
May 10
SYD10:20 amSydney Kingsford Smith
16h 21m
1 stop
ONT9:41 amOntario
$1,040

Air New Zealand flights from Ontario to Sydney

Our best Air New Zealand deals on Ontario to Sydney flight tickets
Air New Zealand
Aug 9
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Aug 16
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,097
Air New Zealand
Jun 14
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jun 29
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,200
Air New Zealand
Apr 4
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
Apr 18
SYD10:20 amSydney Kingsford Smith
16h 48m
1 stop
ONT10:08 amOntario
$2,419

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 24, 2026.
Use the filters below to find and compare flights from Ontario to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 5/5

6:00 am-6:50 am

2 stops31h 50m

Sydney Kingsford Smith

Tue 5/12

9:15 am-11:34 pm

2 stops31h 19m

$1,003

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 8/4

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Thu 8/13

8:45 pm-9:47 pm

1 stop18h 02m

$1,009

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 8/6

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Tue 8/18

8:45 pm-9:47 pm

1 stop18h 02m

$1,023
Quickest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Sun 5/10

10:20 am-9:41 am

1 stop16h 21m

$1,038

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Sun 5/10

10:20 am-9:41 am

1 stop16h 21m

$1,039

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Sun 5/10

10:20 am-9:41 am

1 stop16h 21m

$1,040

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Sun 5/10

10:20 am-12:22 pm

1 stop19h 02m

$1,041

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Mon 5/11

10:20 am-9:41 am

1 stop16h 21m

$1,042

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Sun 5/10

10:20 am-9:41 am

1 stop16h 21m

$1,044

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Sun 5/10

10:20 am-9:41 am

1 stop16h 21m

$1,045

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

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

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

The cheapest day to depart from Ontario to Sydney is on a Wednesday when prices can be found for as low as $1,003. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,084.

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 round-trip 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

17h 50m

Direct flights

None
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

  • How far is Ontario to Sydney Kingsford Smith by plane?

    A flight from Ontario to Sydney Kingsford Smith will travel around 7527.4 mi. 17h 50m is a normal flight duration for this route.

  • 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 updated daily.

  • 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Bondi Beach
Katoomba
Wollongong
Penrith
Manly
Randwick
Coogee
Leura
Lithgow
Cronulla
Charlestown
Terrigal
Swansea

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Sydney. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Sydney from Ontario with this policy.

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

Once all potential Ontario to Sydney flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Sydney from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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