AirHint found the following cheapest return flights from London (LCY) to Melbourne (MEL) in December 2025 (see full year).

Return flights

31 Dec - 15 Jan	Lufthansa
24 Dec - 28 Jan	British Airways
24 Dec - 25 Jan	KLM
24 Dec - 14 Jan	KLM
24 Dec - 21 Jan	British Airways
29 Dec - 19 Jan	SWISS
30 Dec - 18 Jan	British Airways
27 Dec - 07 Jan	KLM
22 Dec - 19 Jan	SWISS
28 Dec - 12 Jan	SWISS
24 Dec - 29 Dec	British Airways
24 Dec - 28 Dec	British Airways
23 Dec - 30 Dec	KLM
23 Dec - 29 Dec	KLM
22 Dec - 29 Dec	SWISS
24 Dec - 31 Dec	SWISS
22 Dec - 31 Dec	KLM
21 Dec - 28 Dec	SWISS
26 Dec - 30 Dec	SWISS
26 Dec - 31 Dec	SWISS

Also check the deals for one-way flights from London to Melbourne 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 Melbourne in December from $1490

Return flights