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

Return flights

09 Sep - 22 Sep	AirAsia
09 Sep - 29 Sep	AirAsia
06 Sep - 20 Sep	Cathay Pacific
21 Sep - 17 Oct	Jetstar
15 Sep - 13 Oct	Turkish Airlines
03 Sep - 29 Sep	VietJet Air
04 Sep - 11 Sep	Singapore Airlines
26 Sep - 18 Oct	AirAsia
09 Sep - 23 Oct	Japan Airlines
07 Sep - 13 Sep	Cathay Pacific
03 Sep - 20 Sep	Singapore Airlines
03 Sep - 18 Sep	Singapore Airlines
07 Sep - 25 Sep	Singapore Airlines
16 Sep - 21 Sep	Singapore Airlines
26 Sep - 10 Oct	AirAsia
25 Sep - 08 Oct	Scoot
01 Sep - 08 Oct	AirAsia
24 Sep - 07 Oct	Batik Air Malaysia
03 Sep - 07 Oct	VietJet Air
25 Sep - 23 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 715€

Return flights