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

Return flights

28 Aug - 04 Sep	SWISS
22 Aug - 09 Sep	KLM
18 Aug - 28 Sep	KLM
13 Aug - 10 Sep	KLM
28 Aug - 08 Sep	SWISS
25 Aug - 08 Sep	KLM
18 Aug - 07 Sep	Air Dolomiti
29 Aug - 14 Sep	KLM
16 Aug - 03 Sep	KLM
31 Aug - 30 Sep	KLM
18 Aug - 31 Aug	KLM
21 Aug - 28 Aug	SWISS
17 Aug - 24 Aug	KLM
26 Aug - 31 Aug	British Airways
17 Aug - 31 Aug	KLM
17 Aug - 30 Aug	KLM
25 Aug - 30 Aug	KLM
22 Aug - 30 Aug	KLM
22 Aug - 31 Aug	KLM
22 Aug - 24 Aug	KLM

Also check the deals for one-way flights from London to Perth in August.

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 August from 957€

Return flights