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

Return flights

01 Sep - 15 Sep	Ryanair
19 Sep - 26 Sep	Pegasus Airlines
22 Sep - 30 Oct	Pegasus Airlines
28 Sep - 05 Oct	Ryanair
21 Sep - 30 Oct	Ryanair
28 Sep - 02 Oct	Ryanair
30 Sep - 07 Oct	Ryanair
01 Sep - 16 Sep	Emirates
05 Sep - 19 Sep	Emirates
01 Sep - 21 Sep	Emirates
01 Sep - 14 Sep	Emirates
01 Sep - 30 Sep	Emirates
21 Sep - 28 Sep	Emirates
10 Sep - 24 Sep	Emirates
09 Sep - 18 Sep	Emirates
08 Sep - 06 Oct	Emirates
25 Sep - 12 Oct	Emirates
01 Sep - 01 Oct	Emirates
10 Sep - 08 Oct	Emirates
09 Sep - 07 Oct	Emirates

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

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 September from $913

Return flights