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Cheap flights from Ontario to Sydney from $517

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 4/15. 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.
Multiple Airlines Logo
8:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,010Multiple Airlines
Wed, Aug 19 - Sat, Sep 5
Multiple Airlines Logo
8:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,013Multiple Airlines
Wed, Aug 19 - Sat, Sep 5
Multiple Airlines Logo
8:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,018Multiple Airlines
Wed, Sep 2 - Sat, Sep 19
Multiple Airlines Logo
8:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,053Multiple Airlines
Wed, Aug 19 - Sat, Aug 22
Multiple Airlines Logo
8:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,066Multiple Airlines
Wed, Aug 26 - Thu, Sep 3
Multiple Airlines Logo
8:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,067Multiple Airlines
Thu, Sep 3 - Sun, Sep 20
Multiple Airlines Logo
8:32 am - 6:50 pm
ONT
-
SYD
40h 18m
1 stop
Multiple Airlines Logo
8:45 pm - 9:47 pm
SYD
-
ONT
18h 02m
1 stop
$1,070Multiple Airlines
Wed, Apr 1 - Tue, Jun 16
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,084Multiple Airlines
Fri, Aug 14 - Sun, Aug 23
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
$1,085Multiple Airlines
Thu, May 28 - Thu, Jun 4
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
$1,095United Airlines
Mon, Apr 20 - Sun, May 3

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Apr 20
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
May 3
SYD10:20 amSydney Kingsford Smith
19h 02m
1 stop
ONT12:22 pmOntario
$1,095
United Airlines
Apr 20
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
May 3
SYD10:20 amSydney Kingsford Smith
16h 21m
1 stop
ONT9:41 amOntario
$1,096
United Airlines
Apr 20
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
May 3
SYD10:20 amSydney Kingsford Smith
16h 21m
1 stop
ONT9:41 amOntario
$1,100

China Airlines flights from Ontario to Sydney

Our best China Airlines deals on Ontario to Sydney flight tickets
China Airlines
Mar 17
ONT11:50 pmOntario
42h 25m
1 stop
SYD12:15 pmSydney Kingsford Smith
Apr 15
SYD10:10 pmSydney Kingsford Smith
36h 50m
1 stop
ONT6:00 pmOntario
$2,293
China Airlines
Mar 17
ONT11:50 pmOntario
40h 55m
2 stops
SYD10:45 amSydney Kingsford Smith
Apr 15
SYD10:10 pmSydney Kingsford Smith
36h 50m
1 stop
ONT6:00 pmOntario
$2,621
China Airlines
Mar 17
ONT11:50 pmOntario
42h 25m
1 stop
SYD12:15 pmSydney Kingsford Smith
Mar 29
SYD10:10 pmSydney Kingsford Smith
37h 50m
1 stop
ONT6:00 pmOntario
$2,674

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 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

Cheapest round-trip
Quickest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/19

8:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sat 9/5

8:45 pm-9:28 pm

1 stop17h 43m

$1,010

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/19

8:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sat 9/5

8:45 pm-9:28 pm

1 stop17h 43m

$1,013

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 9/2

8:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sat 9/19

8:45 pm-9:28 pm

1 stop17h 43m

$1,018

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/19

8:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sat 8/22

8:45 pm-9:28 pm

1 stop17h 43m

$1,053

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/26

8:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Thu 9/3

8:45 pm-9:28 pm

1 stop17h 43m

$1,066

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 9/3

8:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sun 9/20

8:45 pm-9:28 pm

1 stop17h 43m

$1,067

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 4/1

8:32 am-6:50 pm

1 stop40h 18m

Sydney Kingsford Smith

Tue 6/16

8:45 pm-9:47 pm

1 stop18h 02m

$1,070

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 8/14

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Sun 8/23

8:45 pm-9:28 pm

1 stop17h 43m

$1,084

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 5/28

9:40 am-6:50 pm

1 stop40h 10m

Sydney Kingsford Smith

Thu 6/4

8:45 pm-10:17 pm

1 stop18h 32m

$1,085

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 4/20

6:49 pm-6:55 am

1 stop19h 06m

Sydney Kingsford Smith

Sun 5/3

10:20 am-12:22 pm

1 stop19h 02m

$1,095

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 $995. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,076.

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.
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 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
Katoomba
Parramatta
Wollongong
Penrith
Coogee
Manly
Randwick
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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