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Cheap flights from Ontario to Sydney from $571

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
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
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
$1,087Multiple Airlines
Tue, May 26 - Tue, Jun 9
Multiple Airlines Logo
7:20 am - 6:50 pm
ONT
-
SYD
18h 30m
1 stop
Multiple Airlines Logo
8:45 pm - 9:28 pm
SYD
-
ONT
17h 43m
1 stop
$1,099Multiple Airlines
Sat, Sep 26 - Sat, Oct 3
Delta Logo
6:00 am - 6:50 am
ONT
-
SYD
31h 50m
2 stops
Delta Logo
9:15 am - 4:25 pm
SYD
-
ONT
24h 10m
2 stops
$1,100Delta
Wed, Apr 29 - Wed, May 6
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
$1,101Multiple Airlines
Tue, Jul 21 - Sun, Aug 9
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
$1,113Multiple Airlines
Wed, Aug 26 - Sat, Sep 5
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
$1,127Multiple Airlines
Thu, May 21 - Sun, May 31
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 9:20 pm
SYD
-
ONT
17h 35m
1 stop
$1,128Multiple Airlines
Thu, Aug 13 - Sun, Aug 23
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
$1,130Multiple Airlines
Wed, Aug 26 - Tue, Sep 29
United Airlines Logo
6:59 pm - 6:55 am
ONT
-
SYD
18h 56m
1 stop
United Airlines Logo
10:20 am - 12:22 pm
SYD
-
ONT
19h 02m
1 stop
$1,134United Airlines
Sun, May 3 - Sun, May 17
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
$1,141Multiple Airlines
Wed, Jun 10 - Tue, Jun 30

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
May 3
ONT6:59 pmOntario
18h 56m
1 stop
SYD6:55 amSydney Kingsford Smith
May 17
SYD10:20 amSydney Kingsford Smith
19h 02m
1 stop
ONT12:22 pmOntario
$1,134
United Airlines
May 31
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jun 14
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,136
United Airlines
Jul 29
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Aug 24
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,145

Air New Zealand flights from Ontario to Sydney

Our best Air New Zealand deals on Ontario to Sydney flight tickets
Air New Zealand
Apr 29
ONT6:49 pmOntario
19h 06m
1 stop
SYD6:55 amSydney Kingsford Smith
May 9
SYD10:20 amSydney Kingsford Smith
16h 21m
1 stop
ONT9:41 amOntario
$1,245
Air New Zealand
Apr 15
ONT11:05 amOntario
26h 50m
1 stop
SYD6:55 amSydney Kingsford Smith
Apr 23
SYD10:20 amSydney Kingsford Smith
16h 36m
1 stop
ONT9:56 amOntario
$1,490

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 April 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 5/26

9:40 am-6:50 pm

1 stop40h 10m

Sydney Kingsford Smith

Tue 6/9

8:45 pm-10:17 pm

1 stop18h 32m

$1,087

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 9/26

7:20 am-6:50 pm

1 stop18h 30m

Sydney Kingsford Smith

Sat 10/3

8:45 pm-9:28 pm

1 stop17h 43m

$1,099

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 4/29

6:00 am-6:50 am

2 stops31h 50m

Sydney Kingsford Smith

Wed 5/6

9:15 am-4:25 pm

2 stops24h 10m

$1,100

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 7/21

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Sun 8/9

8:45 pm-9:45 pm

1 stop18h 00m

$1,101
Quickest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/26

7:20 am-6:50 pm

1 stop18h 30m

Sydney Kingsford Smith

Sat 9/5

8:45 pm-9:20 pm

1 stop17h 35m

$1,113

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 5/21

9:40 am-6:50 pm

1 stop40h 10m

Sydney Kingsford Smith

Sun 5/31

8:45 pm-10:17 pm

1 stop18h 32m

$1,127

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 8/13

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Sun 8/23

8:45 pm-9:20 pm

1 stop17h 35m

$1,128

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/26

7:20 am-6:50 pm

1 stop18h 30m

Sydney Kingsford Smith

Tue 9/29

8:45 pm-9:20 pm

1 stop17h 35m

$1,130

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 5/3

6:59 pm-6:55 am

1 stop18h 56m

Sydney Kingsford Smith

Sun 5/17

10:20 am-12:22 pm

1 stop19h 02m

$1,134

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 6/10

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Tue 6/30

8:45 pm-9:45 pm

1 stop18h 00m

$1,141

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 $998. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,081.

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.
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. 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
Randwick
Coogee
Leura
Lithgow
Manly
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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