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

Return flights

23 Sep - 30 Oct	Ryanair
24 Sep - 22 Oct	Ryanair
30 Sep - 22 Oct	Ryanair
25 Sep - 13 Oct	Pegasus Airlines
15 Sep - 18 Oct	Pegasus Airlines
24 Sep - 06 Oct	Ryanair
29 Sep - 30 Oct	Ryanair
29 Sep - 20 Oct	Ryanair
17 Sep - 08 Oct	Ryanair
02 Sep - 14 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
19 Sep - 02 Oct	Ryanair
17 Sep - 28 Sep	Ryanair
18 Sep - 23 Sep	Pegasus Airlines
02 Sep - 23 Sep	Ryanair
02 Sep - 09 Sep	Ryanair
03 Sep - 10 Sep	Ryanair
25 Sep - 30 Sep	AJet
14 Sep - 28 Sep	Pegasus Airlines
03 Sep - 14 Sep	Ryanair

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 716€

Return flights