Cheap flights from Ontario to Sydney

One-way fares from $617 · ONT → SYD · prices found by travellers in the last 48 hours

Compare all dates Sydney → Ontario
Cheapest fare
$617

United Airlines · Wed, Nov 4

Cheapest month
November

from $617

Direct flights
Not recently

Usually 1+ stop

Quickest trip
16h 48m

12,120 km

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Cheapest month to fly from Ontario to Sydney

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 Cheapest $617
  2. December 2026 $652
  3. January 2027 $1,316
  4. March 2027 $1,375

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About flights from Ontario to Sydney

Ontario (ONT) and Sydney (SYD) are about 12,120 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 16h 48m. Over the next few months, one-way fares start from $617, and November 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Ontario to Sydney?

The cheapest one-way fare we've seen recently is $617 with United Airlines, departing Wednesday, November 4, 2026. Over the coming months, the lowest fare in each month ranges from $617 to $1,375.

What is the cheapest month to fly from Ontario to Sydney?

November 2026 currently has the lowest fares, from $617 one way.

Are there direct flights from Ontario to Sydney?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Ontario to Sydney?

The quickest journey we've seen takes about 16h 48m. Ontario and Sydney are around 12,120 km apart.

Which airlines fly from Ontario to Sydney?

Recent fares on this route were with United Airlines and Alaska Airlines.

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