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

Return flights

03 Sep - 08 Sep	Eurowings
10 Sep - 13 Sep	Lufthansa
07 Sep - 30 Sep	SWISS
01 Sep - 29 Sep	SWISS
01 Sep - 30 Sep	SWISS
01 Sep - 28 Sep	China Airlines
04 Sep - 25 Sep	China Airlines
02 Sep - 21 Sep	China Airlines
01 Sep - 21 Sep	China Airlines
07 Sep - 21 Sep	China Airlines
16 Sep - 01 Oct	China Airlines
25 Sep - 16 Oct	China Airlines
14 Sep - 12 Oct	China Airlines
29 Sep - 15 Oct	China Airlines
14 Sep - 08 Oct	China Airlines
18 Sep - 09 Oct	China Airlines
28 Sep - 12 Oct	China Airlines
08 Sep - 12 Oct	China Airlines
29 Sep - 12 Oct	China Airlines
23 Sep - 15 Oct	China Airlines

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 909€

Return flights