AirHint found the following cheapest return flights from London (LCY) to Melbourne (MEL) in September 2025 (see full year).

Return flights

01 Sep - 08 Sep	SWISS
15 Sep - 21 Sep	SWISS
03 Sep - 10 Sep	SWISS
16 Sep - 22 Oct	British Airways
17 Sep - 22 Oct	British Airways
11 Sep - 18 Sep	SWISS
16 Sep - 29 Sep	British Airways
22 Sep - 29 Sep	SWISS
16 Sep - 16 Oct	British Airways
14 Sep - 21 Sep	Lufthansa
16 Sep - 14 Oct	British Airways
09 Sep - 23 Sep	SWISS
10 Sep - 16 Sep	SWISS
22 Sep - 22 Oct	British Airways
04 Sep - 11 Sep	SWISS
15 Sep - 05 Oct	British Airways
23 Sep - 07 Oct	British Airways
23 Sep - 06 Oct	British Airways
26 Sep - 05 Oct	British Airways
16 Sep - 15 Oct	Condor

Also check the deals for one-way flights from London to Melbourne 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 Melbourne in September from $1120

Return flights