What is the cheapest airline that flies from Ontario to Australia?

United Airlines and American Airlines are the most popular carriers operating from Ontario to Australia

What airlines fly to Australia?

Qantas Airways, Fiji Airways and United Airlines are the top three most popular airlines that fly to Australia from Ontario according to our data. Qantas Airways is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 14 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Australia?

Prices for flights from Ontario Airport to Australia are refreshed on a daily basis.

How many operators does momondo search for flights from Ontario Airport to Australia?

As of August 2026, there is 1 operator available to choose from for flights from Ontario Airport to Australia.

How old do you have to be to fly from Ontario Airport to Australia?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Australia.

What documentation or ID do you need to fly to Australia?

The required travel and health documents for your Australia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Australia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$496 Cheap Flights from Ontario to Australia in 2026

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Find the cheapest flights from Ontario to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:31 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$971Multiple Airlines

Sun, Aug 30 - Tue, Sep 15

7:00 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

8:45 pm - 9:29 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 44m1 stop Honolulu

$985Multiple Airlines

Wed, Oct 14 - Sun, Oct 18

7:00 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

9:40 pm - 9:29 pmSYD Sydney Kingsford Smith-ONT Ontario

17h 49m1 stop Honolulu

$999Multiple Airlines

Wed, Oct 21 - Tue, Oct 27

7:00 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

9:40 pm - 9:29 pmSYD Sydney Kingsford Smith-ONT Ontario

17h 49m1 stop Honolulu

$999Multiple Airlines

Wed, Oct 14 - Tue, Oct 27

9:31 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,001Multiple Airlines

Sun, Aug 30 - Tue, Sep 15

7:00 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

17h 50m1 stop Honolulu

9:40 pm - 9:29 pmSYD Sydney Kingsford Smith-ONT Ontario

17h 49m1 stop Honolulu

$1,002Multiple Airlines

Wed, Oct 14 - Tue, Oct 27

9:31 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,002Multiple Airlines

Sun, Aug 30 - Sun, Sep 6

9:31 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,002Multiple Airlines

Tue, Sep 22 - Tue, Sep 29

12:30 pm - 7:30 amONT Ontario-BNE Brisbane

25h 00m1 stop San Francisco

11:40 am - 12:15 pmBNE Brisbane-ONT Ontario

18h 35m1 stop San Francisco

$1,088United Airlines

Thu, Nov 26 - Sun, Dec 20

7:13 pm - 6:30 amONT Ontario-BNE Brisbane

18h 17m1 stop San Francisco

10:30 am - 12:12 pmBNE Brisbane-ONT Ontario

18h 42m1 stop San Francisco

$1,091United Airlines

Fri, Aug 28 - Tue, Sep 1

Cheap last minute flights

Enter your travel dates to find the best prices.

9:11 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 39m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,002Multiple Airlines

Tue, Aug 18 - Sun, Aug 30

9:11 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 39m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,052Multiple Airlines

Tue, Aug 18 - Sat, Aug 22

9:31 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,061Multiple Airlines

Fri, Aug 21 - Sun, Sep 6

7:13 pm - 6:55 amONT Ontario-SYD Sydney Kingsford Smith

18h 42m1 stop San Francisco

10:20 am - 12:12 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 52m1 stop San Francisco

$1,083United Airlines

Mon, Aug 17 - Wed, Sep 2

7:13 pm - 6:55 amONT Ontario-SYD Sydney Kingsford Smith

18h 42m1 stop San Francisco

10:20 am - 12:12 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 52m1 stop San Francisco

$1,088United Airlines

Mon, Aug 17 - Wed, Sep 2

7:13 pm - 6:55 amONT Ontario-SYD Sydney Kingsford Smith

18h 42m1 stop San Francisco

10:20 am - 6:11 pmSYD Sydney Kingsford Smith-ONT Ontario

24h 51m1 stop San Francisco

$1,093United Airlines

Mon, Aug 17 - Tue, Aug 25

1:56 pm - 6:55 amONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 am - 8:01 pmSYD Sydney Kingsford Smith-ONT Ontario

26h 41m1 stop San Francisco

$1,093United Airlines

Tue, Aug 18 - Wed, Sep 2

1:56 pm - 6:55 amONT Ontario-SYD Sydney Kingsford Smith

23h 59m1 stop San Francisco

10:20 am - 6:16 pmSYD Sydney Kingsford Smith-ONT Ontario

24h 56m1 stop San Francisco

$1,093United Airlines

Wed, Aug 19 - Wed, Aug 26

7:13 pm - 6:55 amONT Ontario-SYD Sydney Kingsford Smith

18h 42m1 stop San Francisco

10:20 am - 12:12 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 52m1 stop San Francisco

$1,093United Airlines

Mon, Aug 17 - Wed, Sep 2

9:31 am - 6:50 pmONT Ontario-SYD Sydney Kingsford Smith

40h 19m1 stop Honolulu

8:45 pm - 10:10 pmSYD Sydney Kingsford Smith-ONT Ontario

18h 25m1 stop Honolulu

$1,097Multiple Airlines

Thu, Aug 20 - Thu, Sep 3

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Air New Zealand flights from Ontario to Australia

Our best Air New Zealand deals on Ontario to Australia flight tickets

Air New Zealand

Feb 2

ONT1:33 pmOntario

24h 02m

2 stops

SYD8:35 amSydney Kingsford Smith

Feb 18

SYD9:55 amSydney Kingsford Smith

26h 52m

2 stops

ONT5:47 pmOntario

$1,159

Air New Zealand

Sep 7

ONT9:01 amOntario

32h 54m

2 stops

MEL10:55 amMelbourne

Sep 11

MEL12:10 pmMelbourne

23h 01m

2 stops

ONT6:11 pmOntario

$1,268

Air New Zealand

Nov 27

ONT6:00 amOntario

31h 55m

2 stops

MEL8:55 amMelbourne

Dec 6

MEL12:10 pmMelbourne

24h 37m

2 stops

ONT5:47 pmOntario

$1,358

Lufthansa flights from Ontario to Australia

Our best Lufthansa deals on Ontario to Australia 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

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

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 10/18

8:45 pm-9:29 pm

1 stop18h 44m

$985

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

OntarioBrisbane

ONT Ontario - BNE Brisbane

ONTBNE

Ontario

Thu 11/26

12:30 pm-7:30 am

1 stop25h 00m

Brisbane

Sun 12/20

11:40 am-12:15 pm

1 stop18h 35m

$1,088

OntarioBrisbane

ONT Ontario - BNE Brisbane

ONTBNE

Ontario

Fri 8/28

7:13 pm-6:30 am

1 stop18h 17m

Brisbane

Tue 9/1

10:30 am-12:12 pm

1 stop18h 42m

$1,091

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Australia

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

Prices

Airlines

Can stopping save me money on Ontario to Australia flights?

You could potentially save up to 16% on your flight if you consider stops on a Ontario to Australia flight.

Cheap Ontario to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Australia

Fastest flight time	17h 50m
Direct flights	None

The fastest flight from Ontario to Australia takes 17h 50m

There are no direct flights from Ontario to Australia. There are no popular flight routes from Ontario to Australia.

Search flight deals

Frequently asked questions about flying from Ontario to Australia

When did momondo last update prices for flights from Ontario Airport to Australia?
Prices for flights from Ontario Airport to Australia are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario Airport to Australia?
As of August 2026, there is 1 operator available to choose from for flights from Ontario Airport to Australia.
How old do you have to be to fly from Ontario Airport to Australia?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Australia.
What documentation or ID do you need to fly to Australia?
The required travel and health documents for your Australia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Australia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Ontario to Australia

Compare and see reviews for airlines that fly from Ontario to Australia with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $1,049	Free Cancellation	Rating 7.4 10,105 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Australia?

It is quick and easy to find Ontario to Australia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Australia that suits you.

Can I find flights from Ontario to Australia with flexible booking policies on momondo?

All flight searches from Ontario to Australia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Australia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Australia.

I’m not ready to book a flight from Ontario to Australia right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Australia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.