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

Return flights

26 Dec - 15 Jan	Air China
25 Dec - 15 Jan	China Eastern
26 Dec - 20 Jan	China Eastern
06 Dec - 29 Dec	China Eastern
26 Dec - 23 Jan	Air China
26 Dec - 19 Jan	Air China
28 Dec - 19 Jan	Air China
24 Dec - 21 Jan	Air China
28 Dec - 14 Jan	Air China
26 Dec - 14 Jan	Air China
24 Dec - 14 Jan	Air China
04 Dec - 09 Dec	Wizz Air UK
05 Dec - 29 Dec	China Eastern
05 Dec - 09 Dec	China Southern
04 Dec - 29 Dec	China Eastern
03 Dec - 14 Dec	Wizz Air Malta
05 Dec - 25 Dec	China Southern
05 Dec - 27 Dec	China Southern
05 Dec - 14 Dec	Wizz Air UK
05 Dec - 08 Dec	Wizz Air UK

Also check the deals for one-way flights from London 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 London to Sydney in December from $972

Return flights