AirHint found the following cheapest return flights from London (LGW) to Sydney (SYD) in September 2026 (see full year).

Return flights

14 Sep - 14 Oct	China Southern
14 Sep - 15 Oct	China Southern
21 Sep - 09 Oct	China Southern
19 Sep - 04 Oct	Turkish Airlines
04 Sep - 18 Sep	Wizz Air UK
22 Sep - 14 Oct	Vueling Airlines
21 Sep - 07 Oct	China Southern
27 Sep - 11 Oct	Iberia Express
24 Sep - 01 Oct	Turkish Airlines
06 Sep - 13 Sep	SKY express
19 Sep - 30 Sep	Wizz Air
18 Sep - 30 Oct	Wizz Air UK
03 Sep - 01 Oct	Iberia Express
07 Sep - 17 Sep	SWISS
10 Sep - 22 Sep	Vueling Airlines
01 Sep - 22 Sep	SKY express
01 Sep - 08 Sep	SKY express
08 Sep - 22 Sep	SWISS
02 Sep - 15 Sep	SWISS
06 Sep - 20 Sep	SKY express

Also check the deals for one-way flights from London to Sydney 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 Sydney in September from $920

Return flights