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Cheap flights from Ontario to Sydney from $459

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 3/28. 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

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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.
Delta Logo
6:00 am - 6:50 am
ONT
-
SYD
29h 50m2 stops
Delta Logo
2:15 pm - 9:44 pm
SYD
-
ONT
26h 29m2 stops
$936Delta
Sat, Feb 21 - Sat, Feb 28
United Airlines Logo
6:39 pm - 9:15 am
ONT
-
SYD
19h 36m1 stop
United Airlines Logo
12:10 pm - 11:18 am
SYD
-
ONT
18h 08m1 stop
$964United Airlines
Sun, Jan 18 - Sun, Feb 1
United Airlines Logo
1:53 pm - 6:20 am
ONT
-
SYD
21h 27m1 stop
United Airlines Logo
12:10 pm - 11:18 am
SYD
-
ONT
18h 08m1 stop
$965United Airlines
Sun, Jan 18 - Sun, Feb 1
United Airlines Logo
1:53 pm - 6:20 am
ONT
-
SYD
21h 27m1 stop
United Airlines Logo
12:10 pm - 11:18 am
SYD
-
ONT
18h 08m1 stop
$967United Airlines
Sun, Jan 25 - Sun, Feb 8
United Airlines Logo
6:39 pm - 9:15 am
ONT
-
SYD
19h 36m1 stop
United Airlines Logo
12:10 pm - 11:18 am
SYD
-
ONT
18h 08m1 stop
$968United Airlines
Sun, Jan 25 - Sun, Feb 8
United Airlines Logo
1:53 pm - 6:20 am
ONT
-
SYD
21h 27m1 stop
United Airlines Logo
12:10 pm - 11:18 am
SYD
-
ONT
18h 08m1 stop
$970United Airlines
Sun, Jan 18 - Sun, Feb 1
United Airlines Logo
6:32 pm - 9:15 am
ONT
-
SYD
19h 43m1 stop
United Airlines Logo
12:10 pm - 12:38 pm
SYD
-
ONT
19h 28m1 stop
$971United Airlines
Sat, Jan 31 - Fri, Feb 13
United Airlines Logo
1:53 pm - 6:20 am
ONT
-
SYD
21h 27m1 stop
United Airlines Logo
12:10 pm - 11:18 am
SYD
-
ONT
18h 08m1 stop
$975United Airlines
Wed, Jan 28 - Sun, Feb 8
United Airlines Logo
6:37 pm - 9:15 am
ONT
-
SYD
19h 38m1 stop
United Airlines Logo
12:10 pm - 12:18 pm
SYD
-
ONT
18h 08m1 stop
$976United Airlines
Sun, Feb 22 - Tue, Mar 10
United Airlines Logo
1:53 pm - 9:15 am
ONT
-
SYD
24h 22m1 stop
United Airlines Logo
12:10 pm - 5:41 pm
SYD
-
ONT
24h 31m1 stop
$978United Airlines
Wed, Feb 11 - Sat, Feb 21

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Jan 18
ONT6:39 pmOntario
19h 36m
1 stop
SYD9:15 amSydney Kingsford Smith
Feb 1
SYD12:10 pmSydney Kingsford Smith
18h 08m
1 stop
ONT11:18 amOntario
$964
United Airlines
Jan 18
ONT1:53 pmOntario
21h 27m
1 stop
SYD6:20 amSydney Kingsford Smith
Feb 1
SYD12:10 pmSydney Kingsford Smith
18h 08m
1 stop
ONT11:18 amOntario
$965
United Airlines
Jan 25
ONT1:53 pmOntario
21h 27m
1 stop
SYD6:20 amSydney Kingsford Smith
Feb 8
SYD12:10 pmSydney Kingsford Smith
18h 08m
1 stop
ONT11:18 amOntario
$967

American Airlines flights from Ontario to Sydney

Our best American Airlines deals on Ontario to Sydney flight tickets
American Airlines
Jan 18
ONT10:58 amOntario
26h 37m
2 stops
SYD8:35 amSydney Kingsford Smith
Feb 1
SYD10:00 pmSydney Kingsford Smith
39h 45m
2 stops
ONT6:45 pmOntario
$3,341
American Airlines
Jan 12
ONT10:58 amOntario
26h 37m
2 stops
SYD8:35 amSydney Kingsford Smith
Jan 27
SYD11:35 amSydney Kingsford Smith
26h 10m
2 stops
ONT6:45 pmOntario
$3,740
American Airlines
Jan 18
ONT10:58 amOntario
26h 37m
2 stops
SYD8:35 amSydney Kingsford Smith
Feb 1
SYD10:00 pmSydney Kingsford Smith
39h 45m
2 stops
ONT6:45 pmOntario
$5,474

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 January 8, 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

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 2/21

6:00 am-6:50 am

2 stops29h 50m

Sydney Kingsford Smith

Sat 2/28

2:15 pm-9:44 pm

2 stops26h 29m

$936

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 1/18

6:39 pm-9:15 am

1 stop19h 36m

Sydney Kingsford Smith

Sun 2/1

12:10 pm-11:18 am

1 stop18h 08m

$964

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 1/18

1:53 pm-6:20 am

1 stop21h 27m

Sydney Kingsford Smith

Sun 2/1

12:10 pm-11:18 am

1 stop18h 08m

$965

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 1/25

1:53 pm-6:20 am

1 stop21h 27m

Sydney Kingsford Smith

Sun 2/8

12:10 pm-11:18 am

1 stop18h 08m

$967

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 1/25

6:39 pm-9:15 am

1 stop19h 36m

Sydney Kingsford Smith

Sun 2/8

12:10 pm-11:18 am

1 stop18h 08m

$968

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 1/18

1:53 pm-6:20 am

1 stop21h 27m

Sydney Kingsford Smith

Sun 2/1

12:10 pm-11:18 am

1 stop18h 08m

$970

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 1/31

6:32 pm-9:15 am

1 stop19h 43m

Sydney Kingsford Smith

Fri 2/13

12:10 pm-12:38 pm

1 stop19h 28m

$971

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 1/28

1:53 pm-6:20 am

1 stop21h 27m

Sydney Kingsford Smith

Sun 2/8

12:10 pm-11:18 am

1 stop18h 08m

$975

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 2/22

6:37 pm-9:15 am

1 stop19h 38m

Sydney Kingsford Smith

Tue 3/10

12:10 pm-12:18 pm

1 stop18h 08m

$976

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 2/11

1:53 pm-9:15 am

1 stop24h 22m

Sydney Kingsford Smith

Sat 2/21

12:10 pm-5:41 pm

1 stop24h 31m

$978

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 $990. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,051.

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 00m

Direct flights

None
The fastest flight from Ontario to Sydney takes 18h 00m
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. 18h 00m 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 many operators does momondo search for flights from Ontario Airport to Sydney Kingsford Smith Airport?

  • 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.

  • What is the most popular airline from Ontario to Sydney?

Best airlines flying from Ontario to Sydney

Compare and see reviews for airlines that fly from Ontario to Sydney with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $926Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Bondi Beach
Katoomba
Wollongong
Randwick
Coogee
Manly
Cronulla
Lithgow
Penrith
Leura
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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