AirHint found the following cheapest return flights from Newcastle (NCL) to Sydney (SYD) in September 2025 (see full year).

Return flights

09 Sep - 20 Sep	British Airways
16 Sep - 02 Oct	China Southern
14 Sep - 28 Sep	British Airways
10 Sep - 24 Sep	China Southern
12 Sep - 25 Sep	China Southern
12 Sep - 12 Oct	China Southern
12 Sep - 27 Sep	British Airways
02 Sep - 16 Sep	British Airways
01 Sep - 15 Sep	British Airways
01 Sep - 16 Sep	British Airways
09 Sep - 22 Sep	British Airways
09 Sep - 23 Sep	British Airways

Also check the deals for one-way flights from Newcastle to Sydney in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Newcastle to Sydney in September from 895€

Return flights