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Cheap flights from Ontario to Sydney from $573

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 2/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Multiple Airlines Logo
7:50 am - 6:50 pm
ONT
-
SYD
18h 00m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,050Multiple Airlines
Mon, Jul 6 - Tue, Sep 8
United Airlines Logo
6:37 pm - 9:15 am
ONT
-
SYD
20h 38m
1 stop
United Airlines Logo
12:10 pm - 12:18 pm
SYD
-
ONT
18h 08m
1 stop
$1,056United Airlines
Tue, Mar 10 - Tue, Mar 17
United Airlines Logo
5:00 am - 6:55 am
ONT
-
SYD
32h 55m
2 stops
United Airlines Logo
10:20 am - 5:18 pm
SYD
-
ONT
23h 58m
2 stops
$1,061United Airlines
Sun, Aug 2 - Sun, Aug 16
Multiple Airlines Logo
7:50 am - 6:50 pm
ONT
-
SYD
18h 00m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,067Multiple Airlines
Mon, Aug 10 - Sun, Aug 23
Multiple Airlines Logo
7:50 am - 6:50 pm
ONT
-
SYD
18h 00m
1 stop
Multiple Airlines Logo
8:45 pm - 10:20 pm
SYD
-
ONT
18h 35m
1 stop
$1,068Multiple Airlines
Thu, Jul 30 - Fri, Aug 14
United Airlines Logo
1:33 pm - 6:55 am
ONT
-
SYD
24h 22m
1 stop
United Airlines Logo
10:20 am - 12:32 pm
SYD
-
ONT
43h 12m
2 stops
$1,076United Airlines
Mon, Jul 13 - Mon, Aug 3
Multiple Airlines Logo
8:41 am - 7:45 pm
ONT
-
SYD
40h 04m
1 stop
Multiple Airlines Logo
9:40 pm - 8:55 pm
SYD
-
ONT
17h 15m
1 stop
$1,084Multiple Airlines
Thu, Mar 5 - Sun, Mar 15
Multiple Airlines Logo
9:30 am - 6:50 pm
ONT
-
SYD
40h 20m
1 stop
Multiple Airlines Logo
8:45 pm - 10:07 pm
SYD
-
ONT
18h 22m
1 stop
$1,085Multiple Airlines
Thu, May 14 - Thu, May 28
United Airlines Logo
6:45 pm - 6:55 am
ONT
-
SYD
19h 10m
1 stop
United Airlines Logo
10:20 am - 9:56 am
SYD
-
ONT
16h 36m
1 stop
$1,104United Airlines
Fri, Apr 10 - Mon, Apr 20
United Airlines Logo
1:00 pm - 6:55 am
ONT
-
SYD
24h 55m
2 stops
United Airlines Logo
10:20 am - 8:20 pm
SYD
-
ONT
27h 00m
2 stops
$1,109United Airlines
Sat, Aug 1 - Sun, Aug 16

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Mar 10
ONT6:37 pmOntario
20h 38m
1 stop
SYD9:15 amSydney Kingsford Smith
Mar 17
SYD12:10 pmSydney Kingsford Smith
18h 08m
1 stop
ONT12:18 pmOntario
$1,056
United Airlines
Aug 2
ONT5:00 amOntario
32h 55m
2 stops
SYD6:55 amSydney Kingsford Smith
Aug 16
SYD10:20 amSydney Kingsford Smith
23h 58m
2 stops
ONT5:18 pmOntario
$1,061
United Airlines
Jul 13
ONT1:33 pmOntario
24h 22m
1 stop
SYD6:55 amSydney Kingsford Smith
Aug 3
SYD10:20 amSydney Kingsford Smith
43h 12m
2 stops
ONT12:32 pmOntario
$1,076

China Airlines flights from Ontario to Sydney

Our best China Airlines deals on Ontario to Sydney flight tickets
China Airlines
Feb 20
ONT10:50 pmOntario
38h 45m
2 stops
SYD8:35 amSydney Kingsford Smith
Feb 27
SYD10:10 pmSydney Kingsford Smith
37h 40m
1 stop
ONT4:50 pmOntario
$3,134
China Airlines
Feb 17
ONT10:50 pmOntario
38h 45m
2 stops
SYD8:35 amSydney Kingsford Smith
Mar 27
SYD10:10 pmSydney Kingsford Smith
37h 40m
1 stop
ONT5:50 pmOntario
$11,622

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 February 11, 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

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 7/6

7:50 am-6:50 pm

1 stop18h 00m

Sydney Kingsford Smith

Tue 9/8

8:45 pm-9:28 pm

1 stop17h 43m

$1,050

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 3/10

6:37 pm-9:15 am

1 stop20h 38m

Sydney Kingsford Smith

Tue 3/17

12:10 pm-12:18 pm

1 stop18h 08m

$1,056

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 8/2

5:00 am-6:55 am

2 stops32h 55m

Sydney Kingsford Smith

Sun 8/16

10:20 am-5:18 pm

2 stops23h 58m

$1,061

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 8/10

7:50 am-6:50 pm

1 stop18h 00m

Sydney Kingsford Smith

Sun 8/23

8:45 pm-9:28 pm

1 stop17h 43m

$1,067

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 7/30

7:50 am-6:50 pm

1 stop18h 00m

Sydney Kingsford Smith

Fri 8/14

8:45 pm-10:20 pm

1 stop18h 35m

$1,068

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 7/13

1:33 pm-6:55 am

1 stop24h 22m

Sydney Kingsford Smith

Mon 8/3

10:20 am-12:32 pm

2 stops43h 12m

$1,076

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 3/5

8:41 am-7:45 pm

1 stop40h 04m

Sydney Kingsford Smith

Sun 3/15

9:40 pm-8:55 pm

1 stop17h 15m

$1,084

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 5/14

9:30 am-6:50 pm

1 stop40h 20m

Sydney Kingsford Smith

Thu 5/28

8:45 pm-10:07 pm

1 stop18h 22m

$1,085

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 4/10

6:45 pm-6:55 am

1 stop19h 10m

Sydney Kingsford Smith

Mon 4/20

10:20 am-9:56 am

1 stop16h 36m

$1,104

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 8/1

1:00 pm-6:55 am

2 stops24h 55m

Sydney Kingsford Smith

Sun 8/16

10:20 am-8:20 pm

2 stops27h 00m

$1,109

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $994. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,068.

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 43m

Direct flights

None
The fastest flight from Ontario to Sydney takes 17h 43m
There are no direct flights from Ontario to Sydney. There are no popular flight routes from Ontario to Sydney.
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  • 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 43m 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
Bondi Beach
Parramatta
Katoomba
Wollongong
Penrith
Coogee
Manly
Randwick
Lithgow
Leura
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.

An easier way to manage your Sydney trip

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