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Cheap flights from Ontario to Sydney from $456

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 10/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Sydney

Cheap round-trip flights

American Airlines Logo
1:00 pm - 9:00 amONT-SYD
26h 00m2 stops
American Airlines Logo
11:20 am - 6:20 pmSYD-ONT
26h 00m2 stops
$940American Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
Alaska Airlines Logo
6:11 pm - 7:45 pmONT-SYD
31h 34m2 stops
Alaska Airlines Logo
9:40 pm - 3:17 pmSYD-ONT
36h 37m2 stops
$1,043Alaska Airlines
Find Deal
Thu, Oct 30 - Fri, Nov 14
Alaska Airlines Logo
10:09 am - 7:45 pmONT-SYD
40h 36m1 stop
Alaska Airlines Logo
9:40 pm - 5:14 pmSYD-ONT
37h 34m1 stop
$1,050Alaska Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 28
Alaska Airlines Logo
4:11 pm - 7:45 pmONT-SYD
33h 34m2 stops
Alaska Airlines Logo
9:40 pm - 3:17 pmSYD-ONT
36h 37m2 stops
$1,052Alaska Airlines
Find Deal
Tue, Oct 28 - Fri, Nov 14
Alaska Airlines Logo
6:11 pm - 7:45 pmONT-SYD
31h 34m2 stops
Alaska Airlines Logo
9:40 pm - 11:05 amSYD-ONT
32h 25m2 stops
$1,053Alaska Airlines
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Thu, Oct 30 - Sat, Nov 15
United Airlines Logo
8:16 pm - 6:55 amONT-SYD
17h 39m1 stop
United Airlines Logo
11:20 am - 12:13 pmSYD-ONT
18h 53m1 stop
$1,088United Airlines
Find Deal
Sun, Sep 28 - Sun, Oct 5
American Airlines Logo
4:49 pm - 9:00 amONT-SYD
22h 11m2 stops
American Airlines Logo
2:05 pm - 10:23 pmSYD-ONT
27h 18m1 stop
$1,091American Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
United Airlines Logo
1:15 pm - 6:55 amONT-SYD
24h 40m2 stops
United Airlines Logo
11:50 am - 9:49 pmSYD-ONT
28h 59m1 stop
$1,092United Airlines
Find Deal
Tue, Sep 30 - Wed, Nov 12
Hawaiian Airlines Logo
9:45 am - 7:45 pmONT-SYD
40h 00m1 stop
Hawaiian Airlines Logo
9:40 pm - 5:14 pmSYD-ONT
38h 34m1 stop
$1,100Hawaiian Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
Hawaiian Airlines Logo
12:13 pm - 7:45 pmONT-SYD
36h 32m2 stops
Hawaiian Airlines Logo
9:40 pm - 9:55 pmSYD-ONT
19h 15m1 stop
$1,151Hawaiian Airlines
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Wed, Dec 3 - Thu, Jan 15

Hawaiian Airlines flights from Ontario to Sydney

Our best Hawaiian Airlines deals on Ontario to Sydney flight tickets
Hawaiian Airlines
Oct 30
ONT9:45 amOntario
40h 00m
1 stop
SYD7:45 pmSydney Kingsford Smith
Nov 6
SYD9:40 pmSydney Kingsford Smith
38h 34m
1 stop
ONT5:14 pmOntario
$1,100
Find similar
Hawaiian Airlines
Dec 3
ONT12:13 pmOntario
36h 32m
2 stops
SYD7:45 pmSydney Kingsford Smith
Jan 15
SYD9:40 pmSydney Kingsford Smith
19h 15m
1 stop
ONT9:55 pmOntario
$1,151
Find similar
Hawaiian Airlines
Oct 26
ONT9:45 amOntario
40h 00m
1 stop
SYD7:45 pmSydney Kingsford Smith
Nov 1
SYD9:40 pmSydney Kingsford Smith
32h 25m
2 stops
ONT12:05 pmOntario
$1,160
Find similar

Alaska Airlines flights from Ontario to Sydney

Our best Alaska Airlines deals on Ontario to Sydney flight tickets
Alaska Airlines
Oct 30
ONT6:11 pmOntario
31h 34m
2 stops
SYD7:45 pmSydney Kingsford Smith
Nov 14
SYD9:40 pmSydney Kingsford Smith
36h 37m
2 stops
ONT3:17 pmOntario
$1,043
Find similar
Alaska Airlines
Sep 30
ONT10:09 amOntario
40h 36m
1 stop
SYD7:45 pmSydney Kingsford Smith
Oct 28
SYD9:40 pmSydney Kingsford Smith
37h 34m
1 stop
ONT5:14 pmOntario
$1,050
Find similar
Alaska Airlines
Oct 28
ONT4:11 pmOntario
33h 34m
2 stops
SYD7:45 pmSydney Kingsford Smith
Nov 14
SYD9:40 pmSydney Kingsford Smith
36h 37m
2 stops
ONT3:17 pmOntario
$1,052
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 September 17, 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 10/30

1:00 pm-9:00 am

2 stops26h 00m

Sydney Kingsford Smith

Thu 11/6

11:20 am-6:20 pm

2 stops26h 00m

$940

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 10/30

6:11 pm-7:45 pm

2 stops31h 34m

Sydney Kingsford Smith

Fri 11/14

9:40 pm-3:17 pm

2 stops36h 37m

$1,043

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 9/30

10:09 am-7:45 pm

1 stop40h 36m

Sydney Kingsford Smith

Tue 10/28

9:40 pm-5:14 pm

1 stop37h 34m

$1,050

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 10/28

4:11 pm-7:45 pm

2 stops33h 34m

Sydney Kingsford Smith

Fri 11/14

9:40 pm-3:17 pm

2 stops36h 37m

$1,052

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 10/30

6:11 pm-7:45 pm

2 stops31h 34m

Sydney Kingsford Smith

Sat 11/15

9:40 pm-11:05 am

2 stops32h 25m

$1,053

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 9/28

8:16 pm-6:55 am

1 stop17h 39m

Sydney Kingsford Smith

Sun 10/5

11:20 am-12:13 pm

1 stop18h 53m

$1,088

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 10/30

4:49 pm-9:00 am

2 stops22h 11m

Sydney Kingsford Smith

Thu 11/6

2:05 pm-10:23 pm

1 stop27h 18m

$1,091

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 9/30

1:15 pm-6:55 am

2 stops24h 40m

Sydney Kingsford Smith

Wed 11/12

11:50 am-9:49 pm

1 stop28h 59m

$1,092

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 10/30

9:45 am-7:45 pm

1 stop40h 00m

Sydney Kingsford Smith

Thu 11/6

9:40 pm-5:14 pm

1 stop38h 34m

$1,100

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 12/3

12:13 pm-7:45 pm

2 stops36h 32m

Sydney Kingsford Smith

Thu 1/15

9:40 pm-9:55 pm

1 stop19h 15m

$1,151

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 Tuesday when prices can be found for as low as $1,047. The most expensive day to fly to Sydney is Monday, with ticket prices averaging around $1,105.

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

Direct flights

None
There are no direct flights from Ontario to Sydney. There are no popular flight routes from Ontario to Sydney.
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  • 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 39m 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
8,926 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
Cronulla
Coogee
Lithgow
Penrith
Manly
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.

An easier way to manage your Sydney trip

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