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Cheap flights from Ontario to Sydney from $497

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 11/10. 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
9:31 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
40h 19m1 stop Honolulu
Multiple Airlines Logo
8:45 pm - 10:10 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 25m1 stop Honolulu
$971Multiple Airlines
Sun, Aug 30 - Tue, Sep 15
Multiple Airlines Logo
7:00 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:29 pmSYD  Sydney Kingsford Smith-ONT Ontario
17h 49m1 stop Honolulu
$999Multiple Airlines
Wed, Oct 21 - Tue, Oct 27
Multiple Airlines Logo
7:00 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:29 pmSYD  Sydney Kingsford Smith-ONT Ontario
17h 49m1 stop Honolulu
$999Multiple Airlines
Wed, Oct 14 - Tue, Oct 27
Multiple Airlines Logo
9:31 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
40h 19m1 stop Honolulu
Multiple Airlines Logo
8:45 pm - 10:10 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 25m1 stop Honolulu
$1,001Multiple Airlines
Sun, Aug 30 - Tue, Sep 15
Multiple Airlines Logo
7:00 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:29 pmSYD  Sydney Kingsford Smith-ONT Ontario
17h 49m1 stop Honolulu
$1,002Multiple Airlines
Wed, Oct 14 - Tue, Oct 27
Multiple Airlines Logo
9:31 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
40h 19m1 stop Honolulu
Multiple Airlines Logo
8:45 pm - 10:10 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 25m1 stop Honolulu
$1,002Multiple Airlines
Sun, Aug 30 - Sun, Sep 6
Multiple Airlines Logo
9:31 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
40h 19m1 stop Honolulu
Multiple Airlines Logo
8:45 pm - 10:10 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 25m1 stop Honolulu
$1,002Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
Multiple Airlines Logo
9:31 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
40h 19m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:29 pmSYD  Sydney Kingsford Smith-ONT Ontario
17h 49m1 stop Honolulu
$1,002Multiple Airlines
Tue, Sep 22 - Tue, Oct 27
Multiple Airlines Logo
9:31 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
40h 19m1 stop Honolulu
Multiple Airlines Logo
8:45 pm - 10:10 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 25m1 stop Honolulu
$1,002Multiple Airlines
Sun, Aug 30 - Tue, Sep 15
Multiple Airlines Logo
7:00 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:29 pmSYD  Sydney Kingsford Smith-ONT Ontario
17h 49m1 stop Honolulu
$1,002Multiple Airlines
Wed, Oct 14 - Sun, Oct 25

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United Airlines flights from Ontario to Sydney

Our best United Airlines deals on Ontario to Sydney flight tickets
United Airlines
Aug 17
ONT7:13 pmOntario
18h 42m
1 stop
SYD6:55 amSydney Kingsford Smith
Sep 2
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,083
United Airlines
Sep 27
ONT6:32 pmOntario
19h 23m
1 stop
SYD6:55 amSydney Kingsford Smith
Oct 12
SYD11:20 amSydney Kingsford Smith
18h 58m
1 stop
ONT12:18 pmOntario
$1,084
United Airlines
Sep 30
ONT1:52 pmOntario
24h 08m
2 stops
SYD7:00 amSydney Kingsford Smith
Oct 7
SYD11:20 amSydney Kingsford Smith
17h 03m
1 stop
ONT10:23 amOntario
$1,088

Lufthansa flights from Ontario to Sydney

Our best Lufthansa deals on Ontario to Sydney flight tickets
Lufthansa
Aug 30
ONT7:13 pmOntario
18h 42m
1 stop
SYD6:55 amSydney Kingsford Smith
Sep 15
SYD10:20 amSydney Kingsford Smith
26h 41m
1 stop
ONT8:01 pmOntario
$1,089
Lufthansa
Aug 30
ONT7:13 pmOntario
18h 42m
1 stop
SYD6:55 amSydney Kingsford Smith
Sep 15
SYD10:20 amSydney Kingsford Smith
26h 41m
1 stop
ONT8:01 pmOntario
$1,096
Lufthansa
Aug 30
ONT7:13 pmOntario
18h 42m
1 stop
SYD6:55 amSydney Kingsford Smith
Sep 15
SYD10:20 amSydney Kingsford Smith
20h 41m
1 stop
ONT2:01 pmOntario
$1,104

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 August 16, 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 Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 8/30

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Tue 9/15

8:45 pm-10:10 pm

1 stop18h 25m

$971
Quickest round-trip

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 10/21

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Tue 10/27

9:40 pm-9:29 pm

1 stop17h 49m

$999

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 10/14

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Tue 10/27

9:40 pm-9:29 pm

1 stop17h 49m

$999

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 8/30

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Tue 9/15

8:45 pm-10:10 pm

1 stop18h 25m

$1,001

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 10/14

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Tue 10/27

9:40 pm-9:29 pm

1 stop17h 49m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 8/30

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Sun 9/6

8:45 pm-10:10 pm

1 stop18h 25m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 9/22

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Tue 9/29

8:45 pm-10:10 pm

1 stop18h 25m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 9/22

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Tue 10/27

9:40 pm-9:29 pm

1 stop17h 49m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 8/30

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Tue 9/15

8:45 pm-10:10 pm

1 stop18h 25m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 10/14

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sun 10/25

9:40 pm-9:29 pm

1 stop17h 49m

$1,002

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 $1,002. The most expensive day to fly to Sydney is Friday, with ticket prices averaging around $1,088.

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
Wollongong
Penrith
Katoomba
Leura
Cronulla
Randwick
Manly
Lithgow
Coogee
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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