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

Return flights

26 Aug - 10 Sep	Ryanair
23 Aug - 10 Sep	Pegasus Airlines
24 Aug - 07 Sep	Pegasus Airlines
20 Aug - 09 Sep	Pegasus Airlines
30 Aug - 16 Sep	Ryanair
25 Aug - 08 Sep	AJet
26 Aug - 08 Sep	Ryanair
18 Aug - 07 Sep	Pegasus Airlines
29 Aug - 12 Sep	Pegasus Airlines
20 Aug - 18 Sep	Pegasus Airlines
21 Aug - 25 Aug	Ryanair
14 Aug - 21 Aug	Pegasus Airlines
16 Aug - 25 Aug	Pegasus Airlines
21 Aug - 31 Aug	Ryanair
28 Aug - 31 Aug	Ryanair
19 Aug - 29 Aug	Ryanair
07 Aug - 21 Aug	Ryanair
20 Aug - 23 Aug	Pegasus Airlines
06 Aug - 20 Aug	AJet
07 Aug - 27 Aug	Ryanair

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 787€

Return flights