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Cheap flights from Ontario to Sydney from $543

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 9/1. 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

Find the cheapest flights from Ontario to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 am - 7:45 pm
ONT
-
SYD
18h 45m
1 stop
Multiple Airlines Logo
9:40 pm - 9:32 pm
SYD
-
ONT
18h 52m
1 stop
$1,044Multiple Airlines
Mon, Oct 26 - Tue, Nov 10
Multiple Airlines Logo
9:31 am - 6:50 pm
ONT
-
SYD
40h 19m
1 stop
Multiple Airlines Logo
8:45 pm - 10:10 pm
SYD
-
ONT
18h 25m
1 stop
$1,045Multiple Airlines
Tue, Sep 1 - Sun, Sep 13
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:45 pm
SYD
-
ONT
18h 00m
1 stop
$1,055Multiple Airlines
Tue, Jul 21 - Tue, Jul 28
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:45 pm
SYD
-
ONT
18h 00m
1 stop
$1,056Multiple Airlines
Tue, Jul 21 - Tue, Jul 28
Lufthansa Logo
1:50 pm - 6:55 am
ONT
-
SYD
24h 05m
1 stop
Lufthansa Logo
10:20 am - 10:37 pm
SYD
-
ONT
29h 17m
1 stop
$1,058Lufthansa
Mon, Jun 29 - Mon, Jul 13
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:45 pm
SYD
-
ONT
18h 00m
1 stop
$1,061Multiple Airlines
Sun, Jun 28 - Sun, Jul 5
Multiple Airlines Logo
9:31 am - 6:50 pm
ONT
-
SYD
40h 19m
1 stop
Multiple Airlines Logo
8:45 pm - 10:10 pm
SYD
-
ONT
18h 25m
1 stop
$1,062Multiple Airlines
Sun, Aug 23 - Sun, Sep 6
Multiple Airlines Logo
7:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
8:45 pm - 9:22 pm
SYD
-
ONT
18h 37m
1 stop
$1,063Multiple Airlines
Thu, Oct 15 - Sun, Oct 18
Multiple Airlines Logo
7:00 am - 7:45 pm
ONT
-
SYD
18h 45m
1 stop
Multiple Airlines Logo
9:40 pm - 9:32 pm
SYD
-
ONT
18h 52m
1 stop
$1,065Multiple Airlines
Sat, Oct 24 - Tue, Nov 3
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:45 pm
SYD
-
ONT
18h 00m
1 stop
$1,080Multiple Airlines
Sun, Jun 28 - Fri, Jul 3

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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
Aug 3
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Aug 12
SYD10:20 amSydney Kingsford Smith
26h 41m
1 stop
ONT8:01 pmOntario
$1,098
Air New Zealand
Nov 11
ONT6:53 pmOntario
19h 22m
1 stop
SYD9:15 amSydney Kingsford Smith
Nov 23
SYD12:10 pmSydney Kingsford Smith
16h 47m
1 stop
ONT9:57 amOntario
$1,107
Air New Zealand
Aug 18
ONT1:18 pmOntario
24h 37m
2 stops
SYD6:55 amSydney Kingsford Smith
Sep 23
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,126

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Jun 28
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 13
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,097
United Airlines
Jun 28
ONT1:50 pmOntario
24h 05m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 13
SYD10:20 amSydney Kingsford Smith
29h 17m
1 stop
ONT10:37 pmOntario
$1,099
United Airlines
Jun 28
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 13
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,100

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 June 17, 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

Mon 10/26

7:00 am-7:45 pm

1 stop18h 45m

Sydney Kingsford Smith

Tue 11/10

9:40 pm-9:32 pm

1 stop18h 52m

$1,044

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 9/1

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Sun 9/13

8:45 pm-10:10 pm

1 stop18h 25m

$1,045

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 7/21

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Tue 7/28

8:45 pm-9:45 pm

1 stop18h 00m

$1,055

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 7/21

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Tue 7/28

8:45 pm-9:45 pm

1 stop18h 00m

$1,056

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 6/29

1:50 pm-6:55 am

1 stop24h 05m

Sydney Kingsford Smith

Mon 7/13

10:20 am-10:37 pm

1 stop29h 17m

$1,058

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/28

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Sun 7/5

8:45 pm-9:45 pm

1 stop18h 00m

$1,061

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 8/23

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Sun 9/6

8:45 pm-10:10 pm

1 stop18h 25m

$1,062
Quickest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 10/15

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sun 10/18

8:45 pm-9:22 pm

1 stop18h 37m

$1,063

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 10/24

7:00 am-7:45 pm

1 stop18h 45m

Sydney Kingsford Smith

Tue 11/3

9:40 pm-9:32 pm

1 stop18h 52m

$1,065

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/28

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Fri 7/3

8:45 pm-9:45 pm

1 stop18h 00m

$1,080

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 $1,000. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,083.

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

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. 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
Katoomba
Bondi Beach
Penrith
Wollongong
Randwick
Leura
Lithgow
Manly
Coogee
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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