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

Return flights

03 Dec - 14 Jan	Lufthansa
09 Dec - 22 Jan	SWISS
30 Dec - 19 Jan	KLM
10 Dec - 22 Jan	KLM
09 Dec - 29 Jan	Lufthansa
09 Dec - 28 Jan	Lufthansa
10 Dec - 13 Jan	KLM
09 Dec - 17 Jan	Lufthansa
09 Dec - 20 Jan	KLM
09 Dec - 25 Jan	KLM
05 Dec - 29 Dec	KLM
01 Dec - 08 Dec	KLM
06 Dec - 16 Dec	KLM
09 Dec - 27 Dec	SWISS
04 Dec - 07 Dec	KLM
02 Dec - 30 Dec	SWISS
02 Dec - 21 Dec	SWISS
10 Dec - 16 Dec	British Airways
10 Dec - 27 Dec	KLM
02 Dec - 16 Dec	British Airways

Also check the deals for one-way flights from London to Perth 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 Perth in December from 939€

Return flights