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

Return flights

01 Dec - 07 Dec	Lufthansa
03 Dec - 10 Dec	SWISS
11 Dec - 15 Jan	Lufthansa
09 Dec - 13 Jan	Lufthansa
08 Dec - 19 Jan	KLM
02 Dec - 25 Dec	KLM
30 Dec - 15 Jan	Lufthansa
01 Dec - 22 Dec	KLM
04 Dec - 25 Dec	KLM
10 Dec - 17 Dec	Air Dolomiti
10 Dec - 24 Jan	KLM
02 Dec - 23 Dec	KLM
05 Dec - 09 Dec	SWISS
30 Dec - 20 Jan	KLM
30 Dec - 14 Jan	Lufthansa
11 Dec - 30 Dec	SWISS
11 Dec - 28 Dec	Lufthansa
08 Dec - 12 Jan	KLM
15 Dec - 19 Jan	KLM
10 Dec - 25 Jan	KLM

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 962€

Return flights