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

Return flights

01 Dec - 08 Dec	British Airways
11 Dec - 12 Jan	British Airways
12 Dec - 12 Jan	Japan Airlines
06 Dec - 31 Dec	British Airways
13 Dec - 01 Jan	British Airways
15 Dec - 01 Jan	Qatar Airways
19 Dec - 10 Jan	British Airways
14 Dec - 02 Jan	British Airways
19 Dec - 20 Dec	KLM

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

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 December from $1478

Return flights