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

Return flights

02 Dec - 20 Jan	Lufthansa
29 Dec - 19 Jan	KLM
06 Dec - 21 Dec	KLM
12 Dec - 18 Jan	KLM
30 Dec - 20 Jan	British Airways
10 Dec - 25 Jan	KLM
29 Dec - 22 Jan	KLM
23 Dec - 18 Jan	KLM
30 Dec - 21 Jan	British Airways
24 Dec - 17 Jan	KLM
16 Dec - 20 Jan	KLM
10 Dec - 28 Dec	KLM
06 Dec - 13 Dec	KLM
09 Dec - 30 Dec	British Airways
08 Dec - 30 Dec	British Airways
01 Dec - 29 Dec	British Airways
08 Dec - 22 Dec	British Airways
09 Dec - 23 Dec	British Airways
01 Dec - 22 Dec	British Airways
10 Dec - 30 Dec	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 1121€

Return flights