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

Return flights

16 Sep - 23 Sep	Cathay Pacific
08 Sep - 21 Sep	Cathay Pacific
13 Sep - 19 Sep	Cathay Pacific
10 Sep - 17 Sep	Cathay Pacific
04 Sep - 13 Sep	Cathay Pacific
01 Sep - 22 Sep	Singapore Airlines
15 Sep - 24 Sep	Cathay Pacific
02 Sep - 11 Sep	Cathay Pacific
01 Sep - 17 Sep	Cathay Pacific
01 Sep - 12 Sep	Cathay Pacific
16 Sep - 14 Oct	Singapore Airlines
07 Sep - 05 Oct	Singapore Airlines
16 Sep - 16 Oct	Singapore Airlines
17 Sep - 01 Oct	Emirates
26 Sep - 08 Oct	IndiGo
20 Sep - 04 Oct	Thai Airways
29 Sep - 06 Oct	Thai Airways
10 Sep - 15 Oct	Thai Airways
15 Sep - 15 Oct	Thai Airways
10 Sep - 08 Oct	Thai Airways

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 $911

Return flights