Cheapest return flights from London to Sydney in September from $1138

Best time to book flights for London (LON) to Sydney (SYD) flights at AirHint

AirHint found the following cheapest return flights from London (LON) to Sydney (SYD) in September 2025 (see full year).

Return flights

01 Sep - 21 Sep China Airlines
29 Sep - 13 Oct China Airlines
10 Sep - 15 Sep China Airlines
01 Sep - 28 Sep China Airlines
01 Sep - 07 Sep China Airlines
08 Sep - 25 Sep China Airlines
06 Sep - 28 Sep China Airlines
15 Sep - 22 Sep China Airlines
05 Sep - 15 Sep China Airlines
01 Sep - 18 Sep China Airlines
08 Sep - 15 Sep China Airlines
26 Sep - 13 Oct China Airlines
20 Sep - 03 Oct China Airlines
23 Sep - 16 Oct China Airlines
08 Sep - 06 Oct China Airlines
24 Sep - 09 Oct China Airlines
22 Sep - 20 Oct China Airlines
14 Sep - 12 Oct SWISS
26 Sep - 10 Oct China Airlines
29 Sep - 10 Oct China Airlines

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

Skyscanner

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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