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Cheap flights from Ontario to Sydney from $580

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 6/9. 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
0 bags

Find the cheapest flights from Ontario to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:40 am - 6:50 pm
ONT
-
SYD
40h 10m
1 stop
Multiple Airlines Logo
8:45 pm - 9:45 pm
SYD
-
ONT
18h 00m
1 stop
$1,061Multiple Airlines
Tue, Jun 2 - Tue, Jun 16
Multiple Airlines Logo
9:40 am - 6:50 pm
ONT
-
SYD
40h 10m
1 stop
Multiple Airlines Logo
8:45 pm - 9:45 pm
SYD
-
ONT
18h 00m
1 stop
$1,074Multiple Airlines
Tue, Jun 9 - Tue, Jun 16
Multiple Airlines Logo
9:40 am - 6:50 pm
ONT
-
SYD
40h 10m
1 stop
Multiple Airlines Logo
8:45 pm - 9:45 pm
SYD
-
ONT
18h 00m
1 stop
$1,088Multiple Airlines
Fri, Jun 5 - Fri, Jun 12
Multiple Airlines Logo
7:20 am - 6:50 pm
ONT
-
SYD
18h 30m
1 stop
Multiple Airlines Logo
8:45 pm - 9:20 pm
SYD
-
ONT
17h 35m
1 stop
$1,105Multiple Airlines
Wed, Aug 26 - Sun, Sep 6
Multiple Airlines Logo
7:20 am - 6:50 pm
ONT
-
SYD
18h 30m
1 stop
Multiple Airlines Logo
8:45 pm - 9:20 pm
SYD
-
ONT
17h 35m
1 stop
$1,109Multiple Airlines
Wed, Aug 26 - Sun, Sep 6
United Airlines Logo
6:39 pm - 6:55 am
ONT
-
SYD
19h 16m
1 stop
United Airlines Logo
10:20 am - 12:12 pm
SYD
-
ONT
18h 52m
1 stop
$1,110United Airlines
Tue, Jun 2 - Wed, Jun 17
United Airlines Logo
6:39 pm - 6:55 am
ONT
-
SYD
19h 16m
1 stop
United Airlines Logo
10:20 am - 5:56 pm
SYD
-
ONT
24h 36m
1 stop
$1,111United Airlines
Wed, Jun 17 - Mon, Jul 13
Multiple Airlines Logo
9:40 am - 6:50 pm
ONT
-
SYD
40h 10m
1 stop
Multiple Airlines Logo
8:45 pm - 10:17 pm
SYD
-
ONT
18h 32m
1 stop
$1,114Multiple Airlines
Thu, May 21 - Thu, May 28
United Airlines Logo
5:00 am - 6:55 am
ONT
-
SYD
32h 55m
2 stops
United Airlines Logo
10:20 am - 12:12 pm
SYD
-
ONT
18h 52m
1 stop
$1,115United Airlines
Wed, Jun 17 - Sun, Jul 5
United Airlines Logo
1:18 pm - 6:55 am
ONT
-
SYD
24h 37m
2 stops
United Airlines Logo
10:20 am - 12:38 pm
SYD
-
ONT
43h 18m
2 stops
$1,129United Airlines
Mon, Aug 10 - Tue, Aug 18

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United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Jun 2
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jun 17
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,110
United Airlines
Jun 17
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 13
SYD10:20 amSydney Kingsford Smith
24h 36m
1 stop
ONT5:56 pmOntario
$1,111
United Airlines
Jun 17
ONT5:00 amOntario
32h 55m
2 stops
SYD6:55 amSydney Kingsford Smith
Jul 5
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,115

China Airlines flights from Ontario to Sydney

Our best China Airlines deals on Ontario to Sydney flight tickets
China Airlines
May 11
ONT12:10 amOntario
41h 35m
1 stop
SYD10:45 amSydney Kingsford Smith
Jun 3
SYD10:10 pmSydney Kingsford Smith
36h 50m
1 stop
ONT6:00 pmOntario
$2,448
China Airlines
May 15
ONT12:10 amOntario
41h 35m
1 stop
SYD10:45 amSydney Kingsford Smith
May 20
SYD10:10 pmSydney Kingsford Smith
36h 50m
1 stop
ONT6:00 pmOntario
$2,450

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 May 6, 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 6/2

9:40 am-6:50 pm

1 stop40h 10m

Sydney Kingsford Smith

Tue 6/16

8:45 pm-9:45 pm

1 stop18h 00m

$1,061

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 6/9

9:40 am-6:50 pm

1 stop40h 10m

Sydney Kingsford Smith

Tue 6/16

8:45 pm-9:45 pm

1 stop18h 00m

$1,074

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 6/5

9:40 am-6:50 pm

1 stop40h 10m

Sydney Kingsford Smith

Fri 6/12

8:45 pm-9:45 pm

1 stop18h 00m

$1,088
Quickest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/26

7:20 am-6:50 pm

1 stop18h 30m

Sydney Kingsford Smith

Sun 9/6

8:45 pm-9:20 pm

1 stop17h 35m

$1,105

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/26

7:20 am-6:50 pm

1 stop18h 30m

Sydney Kingsford Smith

Sun 9/6

8:45 pm-9:20 pm

1 stop17h 35m

$1,109

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 6/2

6:39 pm-6:55 am

1 stop19h 16m

Sydney Kingsford Smith

Wed 6/17

10:20 am-12:12 pm

1 stop18h 52m

$1,110

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 6/17

6:39 pm-6:55 am

1 stop19h 16m

Sydney Kingsford Smith

Mon 7/13

10:20 am-5:56 pm

1 stop24h 36m

$1,111

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 5/21

9:40 am-6:50 pm

1 stop40h 10m

Sydney Kingsford Smith

Thu 5/28

8:45 pm-10:17 pm

1 stop18h 32m

$1,114

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 6/17

5:00 am-6:55 am

2 stops32h 55m

Sydney Kingsford Smith

Sun 7/5

10:20 am-12:12 pm

1 stop18h 52m

$1,115

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 8/10

1:18 pm-6:55 am

2 stops24h 37m

Sydney Kingsford Smith

Tue 8/18

10:20 am-12:38 pm

2 stops43h 18m

$1,129

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 $988. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,078.

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

18h 30m

Direct flights

None
The fastest flight from Ontario to Sydney takes 18h 30m
There are no direct flights from Ontario to Sydney. There are no popular flight routes from Ontario to Sydney.
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Frequently asked questions about flying from Ontario to Sydney

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

    A flight from Ontario to Sydney Kingsford Smith will travel around 7527.4 mi. 18h 30m 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
Leura
Randwick
Coogee
Lithgow
Manly
Cronulla
Terrigal
Charlestown
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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