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

Return flights

31 Jul - 31 Aug	Air China
31 Jul - 15 Aug	China Eastern
31 Jul - 10 Aug	Air China
28 Jul - 13 Aug	China Eastern
31 Jul - 17 Aug	China Eastern
29 Jul - 21 Aug	China Eastern
30 Jul - 17 Aug	China Eastern
31 Jul - 11 Aug	China Eastern
30 Jul - 14 Aug	China Southern
28 Jul - 07 Aug	Air China
28 Jul - 31 Jul	China Eastern
27 Jul - 31 Jul	Virgin Australia

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

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 July from 716€

Return flights