AirHint found the following cheapest return flights from London (LON) to Perth (PER) in September 2026 (see full year).

Return flights

17 Sep - 15 Oct	Vueling Airlines
22 Sep - 06 Oct	Wizz Air UK
09 Sep - 08 Oct	Wizz Air UK
15 Sep - 15 Oct	Pegasus Airlines
24 Sep - 15 Oct	Wizz Air UK
22 Sep - 13 Oct	Pegasus Airlines
16 Sep - 07 Oct	Wizz Air UK
04 Sep - 15 Sep	Wizz Air UK
21 Sep - 12 Oct	Ryanair
18 Sep - 09 Oct	Wizz Air UK
21 Sep - 06 Oct	Ryanair
08 Sep - 15 Sep	Wizz Air UK
01 Sep - 18 Sep	Wizz Air UK
01 Sep - 10 Sep	Wizz Air UK
07 Sep - 13 Sep	Vueling Airlines
09 Sep - 19 Sep	Wizz Air UK
07 Sep - 14 Sep	Wizz Air UK
06 Sep - 13 Sep	Pegasus Airlines
01 Sep - 13 Sep	Ryanair
16 Sep - 25 Sep	Wizz Air UK

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 646€

Return flights