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Cheap flights from Ontario to Sydney from $465

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 3/19. 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 - 8:30 am
ONT
-
SYD
31h 30m2 stops
Delta Logo
10:40 am - 11:58 pm
SYD
-
ONT
32h 18m2 stops
$934Delta
Thu, Jan 29 - Thu, Feb 5
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
$967United Airlines
Mon, Dec 29 - Mon, Jan 12
United Airlines Logo
6:39 pm - 9:15 am
ONT
-
SYD
19h 36m1 stop
United Airlines Logo
10:20 am - 9:55 am
SYD
-
ONT
16h 35m1 stop
$973United Airlines
Tue, Dec 30 - Mon, Apr 6
United Airlines Logo
6:53 pm - 7:55 am
ONT
-
SYD
19h 02m1 stop
United Airlines Logo
10:20 am - 12:20 pm
SYD
-
ONT
19h 00m1 stop
$976United Airlines
Wed, Apr 1 - Thu, Apr 9
United Airlines Logo
1:50 pm - 9:15 am
ONT
-
SYD
24h 25m1 stop
United Airlines Logo
11:50 am - 8:50 pm
SYD
-
ONT
28h 00m2 stops
$978United Airlines
Tue, Feb 17 - Mon, Feb 23
United Airlines Logo
6:32 pm - 9:15 am
ONT
-
SYD
19h 43m1 stop
United Airlines Logo
12:10 pm - 12:47 pm
SYD
-
ONT
19h 37m1 stop
$979United Airlines
Sat, Feb 7 - Sat, Feb 14
United Airlines Logo
1:24 pm - 9:15 am
ONT
-
SYD
24h 51m2 stops
United Airlines Logo
11:50 am - 9:58 pm
SYD
-
ONT
29h 08m1 stop
$981United Airlines
Sat, Feb 7 - Wed, Feb 11
United Airlines Logo
6:00 am - 6:20 am
ONT
-
SYD
29h 20m1 stop
United Airlines Logo
12:10 pm - 10:01 am
SYD
-
ONT
16h 51m1 stop
$982United Airlines
Fri, Dec 26 - Wed, Dec 31
United Airlines Logo
5:05 am - 6:20 am
ONT
-
SYD
30h 15m2 stops
United Airlines Logo
12:10 pm - 12:17 pm
SYD
-
ONT
19h 07m1 stop
$984United Airlines
Sat, Jan 17 - Sat, Jan 24
United Airlines Logo
6:00 am - 6:20 am
ONT
-
SYD
29h 20m1 stop
United Airlines Logo
2:00 pm - 5:43 pm
SYD
-
ONT
22h 43m1 stop
$985United Airlines
Fri, Dec 26 - Fri, Jan 16

United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Dec 29
ONT6:39 pmOntario
19h 36m
1 stop
SYD9:15 amSydney Kingsford Smith
Jan 12
SYD12:10 pmSydney Kingsford Smith
18h 08m
1 stop
ONT11:18 amOntario
$967
Find similar
United Airlines
Dec 30
ONT6:39 pmOntario
19h 36m
1 stop
SYD9:15 amSydney Kingsford Smith
Apr 5
SYD10:20 amSydney Kingsford Smith
16h 35m
1 stop
ONT9:55 amOntario
$973
Find similar
United Airlines
Dec 27
ONT10:42 amOntario
24h 38m
1 stop
SYD6:20 amSydney Kingsford Smith
Dec 31
SYD12:10 pmSydney Kingsford Smith
16h 51m
1 stop
ONT10:01 amOntario
$976
Find similar

Lufthansa flights from Ontario to Sydney

Our best Lufthansa deals on Ontario to Sydney flight tickets
Lufthansa
Dec 28
ONT10:42 amOntario
24h 38m
1 stop
SYD6:20 amSydney Kingsford Smith
Jan 12
SYD12:10 pmSydney Kingsford Smith
18h 08m
1 stop
ONT11:18 amOntario
$1,231
Find similar
Lufthansa
Dec 28
ONT6:00 amOntario
29h 20m
1 stop
SYD6:20 amSydney Kingsford Smith
Jan 13
SYD2:00 pmSydney Kingsford Smith
22h 51m
1 stop
ONT5:51 pmOntario
$1,232
Find similar
Lufthansa
Dec 28
ONT10:42 amOntario
24h 38m
1 stop
SYD6:20 amSydney Kingsford Smith
Jan 12
SYD2:00 pmSydney Kingsford Smith
22h 43m
1 stop
ONT5:43 pmOntario
$1,233
Find similar

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 December 16, 2025.
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

Thu 1/29

6:00 am-8:30 am

2 stops31h 30m

Sydney Kingsford Smith

Thu 2/5

10:40 am-11:58 pm

2 stops32h 18m

$934

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 12/29

6:39 pm-9:15 am

1 stop19h 36m

Sydney Kingsford Smith

Mon 1/12

12:10 pm-11:18 am

1 stop18h 08m

$967

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 12/30

6:39 pm-9:15 am

1 stop19h 36m

Sydney Kingsford Smith

Mon 4/6

10:20 am-9:55 am

1 stop16h 35m

$973

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 4/1

6:53 pm-7:55 am

1 stop19h 02m

Sydney Kingsford Smith

Thu 4/9

10:20 am-12:20 pm

1 stop19h 00m

$976

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 2/17

1:50 pm-9:15 am

1 stop24h 25m

Sydney Kingsford Smith

Mon 2/23

11:50 am-8:50 pm

2 stops28h 00m

$978

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 2/7

6:32 pm-9:15 am

1 stop19h 43m

Sydney Kingsford Smith

Sat 2/14

12:10 pm-12:47 pm

1 stop19h 37m

$979

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 2/7

1:24 pm-9:15 am

2 stops24h 51m

Sydney Kingsford Smith

Wed 2/11

11:50 am-9:58 pm

1 stop29h 08m

$981

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 12/26

6:00 am-6:20 am

1 stop29h 20m

Sydney Kingsford Smith

Wed 12/31

12:10 pm-10:01 am

1 stop16h 51m

$982

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 1/17

5:05 am-6:20 am

2 stops30h 15m

Sydney Kingsford Smith

Sat 1/24

12:10 pm-12:17 pm

1 stop19h 07m

$984

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 12/26

6:00 am-6:20 am

1 stop29h 20m

Sydney Kingsford Smith

Fri 1/16

2:00 pm-5:43 pm

1 stop22h 43m

$985

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 $992. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,057.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Ontario to Sydney in the morning for as low as $949. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly at noon, with an average ticket price of $1,126. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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 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
9,095 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
Penrith
Cronulla
Lithgow
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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