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Cheap flights from Ontario to Sydney from $495

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 10/26. 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 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:32 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 52m1 stop Honolulu
$984Multiple Airlines
Mon, Oct 19 - Sun, Nov 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 - 9:32 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 52m1 stop Honolulu
$985Multiple Airlines
Wed, Oct 21 - Tue, Nov 3
Multiple Airlines Logo
7:00 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:32 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 52m1 stop Honolulu
$1,001Multiple Airlines
Mon, Oct 19 - Sun, Nov 8
Multiple Airlines Logo
9:00 am - 7:45 pmONT  Ontario-SYD Sydney Kingsford Smith
39h 45m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:28 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 48m1 stop Honolulu
$1,001Multiple Airlines
Tue, Jan 26 - Tue, Feb 2
Multiple Airlines Logo
7:00 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:42 pmSYD  Sydney Kingsford Smith-ONT Ontario
19h 02m1 stop Honolulu
$1,002Multiple Airlines
Mon, Oct 19 - Sun, Nov 1
Multiple Airlines Logo
9:31 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
40h 19m1 stop Honolulu
Multiple Airlines Logo
8:45 pm - 9:29 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 44m1 stop Honolulu
$1,002Multiple Airlines
Tue, Sep 29 - Tue, Oct 13
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, Sep 6 - Sun, Sep 20
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
7:00 am - 6:50 pmONT  Ontario-SYD Sydney Kingsford Smith
17h 50m1 stop Honolulu
Multiple Airlines Logo
9:40 pm - 9:32 pmSYD  Sydney Kingsford Smith-ONT Ontario
18h 52m1 stop Honolulu
$1,002Multiple Airlines
Mon, Oct 19 - Tue, Nov 10
Delta Logo
6:00 am - 6:50 amONT  Ontario-SYD Sydney Kingsford Smith
31h 50m2 stops Salt Lake City Los Angeles
Delta Logo
9:15 am - 11:47 pmSYD  Sydney Kingsford Smith-ONT Ontario
31h 32m2 stops Los Angeles Salt Lake City
$1,048Delta
Tue, Sep 1 - Sun, Sep 20

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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 16
ONT7:13 pmOntario
18h 42m
1 stop
SYD6:55 amSydney Kingsford Smith
Aug 23
SYD10:20 amSydney Kingsford Smith
24h 51m
1 stop
ONT6:11 pmOntario
$1,093
United Airlines
Sep 29
ONT1:52 pmOntario
24h 03m
1 stop
SYD6:55 amSydney Kingsford Smith
Oct 6
SYD11:20 amSydney Kingsford Smith
27h 38m
2 stops
ONT8:58 pmOntario
$1,097
United Airlines
Aug 16
ONT5:00 amOntario
32h 55m
2 stops
SYD6:55 amSydney Kingsford Smith
Aug 25
SYD10:20 amSydney Kingsford Smith
18h 52m
1 stop
ONT12:12 pmOntario
$1,098

Delta flights from Ontario to Sydney

Our best Delta deals on Ontario to Sydney flight tickets
Delta
Sep 1
ONT6:00 amOntario
31h 50m
2 stops
SYD6:50 amSydney Kingsford Smith
Sep 20
SYD9:15 amSydney Kingsford Smith
31h 32m
2 stops
ONT11:47 pmOntario
$1,048
Delta
Sep 4
ONT1:06 pmOntario
24h 44m
2 stops
SYD6:50 amSydney Kingsford Smith
Sep 8
SYD9:15 amSydney Kingsford Smith
29h 49m
2 stops
ONT10:04 pmOntario
$1,098

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 11, 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

Mon 10/19

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sun 11/15

9:40 pm-9:32 pm

1 stop18h 52m

$984

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 11/3

9:40 pm-9:32 pm

1 stop18h 52m

$985

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 10/19

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sun 11/8

9:40 pm-9:32 pm

1 stop18h 52m

$1,001

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 1/26

9:00 am-7:45 pm

1 stop39h 45m

Sydney Kingsford Smith

Tue 2/2

9:40 pm-9:28 pm

1 stop18h 48m

$1,001

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 10/19

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Sun 11/1

9:40 pm-9:42 pm

1 stop19h 02m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 9/29

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Tue 10/13

8:45 pm-9:29 pm

1 stop18h 44m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 9/6

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Sun 9/20

8:45 pm-10:10 pm

1 stop18h 25m

$1,002
Quickest round-trip

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

Mon 10/19

7:00 am-6:50 pm

1 stop17h 50m

Sydney Kingsford Smith

Tue 11/10

9:40 pm-9:32 pm

1 stop18h 52m

$1,002

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 9/1

6:00 am-6:50 am

2 stops31h 50m

Sydney Kingsford Smith

Sun 9/20

9:15 am-11:47 pm

2 stops31h 32m

$1,048

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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