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

Return flights

25 Aug - 15 Sep	Air India
19 Aug - 09 Sep	Air India
26 Aug - 09 Sep	Air India
31 Aug - 21 Sep	Air India
24 Aug - 14 Sep	Air India
18 Aug - 15 Sep	Air India
26 Aug - 10 Sep	Air India
27 Aug - 17 Sep	Air India
30 Aug - 10 Sep	Air India
20 Aug - 17 Sep	Air India
25 Aug - 31 Aug	China Airlines
24 Aug - 31 Aug	China Airlines
22 Aug - 31 Aug	China Airlines
18 Aug - 30 Aug	China Airlines
19 Aug - 31 Aug	China Airlines
17 Aug - 31 Aug	China Airlines
24 Aug - 30 Aug	China Airlines
18 Aug - 31 Aug	China Airlines
12 Aug - 19 Aug	Air India
13 Aug - 16 Aug	Air India

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

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 August from 873€

Return flights