Cheapest return flights from London to Sydney in September from $953

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

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

Return flights

23 Sep - 29 Oct Vietnam Airlines
01 Sep - 15 Oct Vietnam Airlines
15 Sep - 27 Oct Vietnam Airlines
23 Sep - 15 Oct Vietnam Airlines
30 Sep - 15 Oct Vietnam Airlines
02 Sep - 15 Oct Vietnam Airlines
15 Sep - 06 Oct Vietnam Airlines
22 Sep - 29 Sep China Airlines
01 Sep - 21 Sep China Airlines
02 Sep - 15 Sep Vietnam Airlines
08 Sep - 17 Sep Vietnam Airlines
08 Sep - 15 Sep Vietnam Airlines
09 Sep - 15 Sep Vietnam Airlines
01 Sep - 15 Sep Vietnam Airlines
12 Sep - 22 Sep China Airlines
08 Sep - 18 Sep China Airlines
02 Sep - 22 Sep China Airlines
16 Sep - 02 Oct China Airlines
10 Sep - 03 Oct China Airlines
24 Sep - 13 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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