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Cheap flights from Ontario to Sydney from $511

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 10/31. 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 - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
9:40 pm - 9:32 pm
SYD
-
ONT
18h 52m
1 stop
$965Multiple Airlines
Mon, Oct 19 - Sun, Nov 1
Multiple Airlines Logo
7:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
9:40 pm - 9:01 pm
SYD
-
ONT
17h 21m
1 stop
$997Multiple Airlines
Wed, Oct 21 - Tue, Oct 27
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
$1,002Multiple Airlines
Tue, Aug 4 - Tue, Aug 11
Multiple Airlines Logo
9:31 am - 6:50 pm
ONT
-
SYD
40h 19m
1 stop
Multiple Airlines Logo
8:45 pm - 9:22 pm
SYD
-
ONT
18h 37m
1 stop
$1,004Multiple Airlines
Tue, Sep 29 - Tue, Oct 13
Multiple Airlines Logo
9:11 am - 6:50 pm
ONT
-
SYD
40h 39m
1 stop
Multiple Airlines Logo
8:45 pm - 10:10 pm
SYD
-
ONT
18h 25m
1 stop
$1,014Multiple Airlines
Tue, Aug 4 - Tue, Aug 25
Multiple Airlines Logo
7:00 am - 6:50 pm
ONT
-
SYD
17h 50m
1 stop
Multiple Airlines Logo
9:40 pm - 9:01 pm
SYD
-
ONT
17h 21m
1 stop
$1,015Multiple Airlines
Wed, Oct 14 - Thu, Oct 29
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
$1,019Multiple 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
9:40 pm - 9:01 pm
SYD
-
ONT
17h 21m
1 stop
$1,027Multiple Airlines
Sat, Oct 17 - Tue, Oct 27
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
$1,031Multiple Airlines
Tue, Aug 25 - Sun, Aug 30
Multiple Airlines Logo
9:00 am - 7:45 pm
ONT
-
SYD
39h 45m
1 stop
Multiple Airlines Logo
9:40 pm - 9:28 pm
SYD
-
ONT
18h 48m
1 stop
$1,033Multiple Airlines
Thu, Dec 3 - Sun, Dec 6

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United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Jul 6
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 20
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,086
United Airlines
Jul 6
ONT6:39 pmOntario
19h 16m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 20
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,088
United Airlines
Jul 7
ONT4:20 pmOntario
21h 35m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 14
SYD10:20 amSydney Kingsford Smith
22h 09m
1 stop
ONT3:29 pmOntario
$1,094

Lufthansa flights from Ontario to Sydney

Our best Lufthansa deals on Ontario to Sydney flight tickets
Lufthansa
Jul 6
ONT1:50 pmOntario
24h 05m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 20
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,044
Lufthansa
Jul 6
ONT1:50 pmOntario
24h 05m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 20
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,053
Lufthansa
Jul 6
ONT1:50 pmOntario
24h 05m
1 stop
SYD6:55 amSydney Kingsford Smith
Jul 20
SYD10:20 amSydney Kingsford Smith
29h 17m
1 stop
ONT10:37 pmOntario
$1,054

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 July 1, 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 10/19

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sun 11/1

9:40 pm-9:32 pm

1 stop18h 52m

$965
Quickest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 10/21

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Tue 10/27

9:40 pm-9:01 pm

1 stop17h 21m

$997

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 8/4

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Tue 8/11

8:45 pm-9:45 pm

1 stop18h 00m

$1,002

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 9/29

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Tue 10/13

8:45 pm-9:22 pm

1 stop18h 37m

$1,004

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 8/4

9:11 am-6:50 pm

1 stop40h 39m

Sydney Kingsford Smith

Tue 8/25

8:45 pm-10:10 pm

1 stop18h 25m

$1,014

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 10/14

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Thu 10/29

9:40 pm-9:01 pm

1 stop17h 21m

$1,015

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

$1,019

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 10/17

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Tue 10/27

9:40 pm-9:01 pm

1 stop17h 21m

$1,027

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 8/25

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Sun 8/30

8:45 pm-10:10 pm

1 stop18h 25m

$1,031

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 12/3

9:00 am-7:45 pm

1 stop39h 45m

Sydney Kingsford Smith

Sun 12/6

9:40 pm-9:28 pm

1 stop18h 48m

$1,033

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 $1,004. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,082.

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
Bondi Beach
Penrith
Wollongong
Katoomba
Randwick
Leura
Lithgow
Coogee
Cronulla
Manly
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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