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

Return flights

16 Aug - 30 Aug	China Eastern
20 Aug - 30 Aug	China Eastern
17 Aug - 07 Sep	China Eastern
28 Aug - 03 Sep	China Eastern
28 Aug - 09 Sep	China Eastern
17 Aug - 09 Sep	Jetstar
16 Aug - 06 Sep	VietJet Air
16 Aug - 13 Sep	VietJet Air
19 Aug - 09 Sep	Jetstar
19 Aug - 31 Aug	Virgin Australia
20 Aug - 28 Aug	China Eastern
22 Aug - 27 Aug	China Eastern
22 Aug - 28 Aug	China Eastern
19 Aug - 14 Sep	Jetstar
19 Aug - 04 Sep	Jetstar
19 Aug - 29 Aug	Jetstar
30 Aug - 06 Sep	Jetstar
17 Aug - 29 Aug	Air China
21 Aug - 31 Aug	Jetstar
21 Aug - 26 Aug	Jetstar

Also check the deals for one-way flights from Sydney to London 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 Sydney to London in August from 782€

Return flights