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

Return flights

29 Sep - 29 Oct	AirAsia
16 Sep - 23 Sep	Scoot
15 Sep - 25 Sep	Scoot
14 Sep - 20 Sep	Scoot
22 Sep - 12 Oct	AirAsia
14 Sep - 22 Sep	Jetstar
11 Sep - 24 Sep	Scoot
11 Sep - 18 Sep	Scoot
09 Sep - 16 Sep	Scoot
22 Sep - 30 Sep	AirAsia
11 Sep - 15 Sep	Scoot
14 Sep - 21 Sep	Scoot
29 Sep - 20 Oct	Batik Air Malaysia
15 Sep - 15 Oct	Scoot
24 Sep - 05 Oct	Malaysia Airlines
17 Sep - 15 Oct	Qantas
16 Sep - 14 Oct	Qantas
28 Sep - 21 Oct	AirAsia
14 Sep - 12 Oct	Scoot
24 Sep - 15 Oct	AirAsia

Also check the deals for one-way flights from Perth to London 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 Perth to London in September from 723€

Return flights