AirHint found the following cheapest return flights from London (LHR) to Perth (PER) in December 2026 (see full year).

Return flights

01 Dec - 06 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
02 Dec - 09 Dec	Cathay Pacific
10 Dec - 09 Jan	ITA Airways
07 Dec - 24 Dec	Cathay Pacific
04 Dec - 23 Dec	Cathay Pacific
04 Dec - 22 Dec	Cathay Pacific
04 Dec - 24 Dec	Cathay Pacific
01 Dec - 09 Dec	Cathay Pacific
02 Dec - 22 Dec	Cathay Pacific
01 Dec - 10 Dec	Cathay Pacific
09 Dec - 09 Jan	Turkish Airlines
19 Dec - 09 Jan	KLM
09 Dec - 02 Jan	SWISS
31 Dec - 08 Jan	ITA Airways
20 Dec - 09 Jan	Lufthansa
10 Dec - 11 Jan	SWISS
30 Dec - 11 Jan	SWISS
30 Dec - 09 Jan	SWISS
09 Dec - 10 Jan	SWISS

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 897€

Return flights