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

Return flights

28 Apr - 19 May	Air China
21 Apr - 12 May	Air China
21 Apr - 19 May	Air China
21 Apr - 14 May	Air China
14 Apr - 12 May	Air China
14 Apr - 10 May	Air China
26 Apr - 19 May	Air China
07 Apr - 06 May	China Southern
16 Apr - 03 May	Air India
20 Apr - 04 May	Air India
12 Apr - 26 Apr	Air China
14 Apr - 28 Apr	Air China
07 Apr - 30 Apr	China Southern
07 Apr - 21 Apr	China Southern
12 Apr - 25 Apr	Air China
14 Apr - 26 Apr	Air India
21 Apr - 27 Apr	Air India
20 Apr - 27 Apr	Air India
16 Apr - 28 Apr	Air India
15 Apr - 22 Apr	Air India

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

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 April from 625€

Return flights