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

Return flights

30 Apr - 12 May	Air China
23 Apr - 24 May	Air China
09 Apr - 30 Apr	Air China
07 Apr - 27 Apr	Air China
23 Apr - 14 May	Air China
07 Apr - 01 May	Air China
05 Apr - 25 Apr	Air Serbia
30 Apr - 07 May	Air China
23 Apr - 07 May	Air China
12 Apr - 10 May	Air India
12 Apr - 02 May	Air India
28 Apr - 12 May	Aegean Airlines
26 Apr - 17 May	Aegean Airlines
02 Apr - 24 Apr	Scandinavian Airlines
02 Apr - 23 Apr	Scandinavian Airlines
02 Apr - 30 Apr	Scandinavian Airlines
07 Apr - 30 Apr	Austrian Airlines
06 Apr - 28 Apr	Etihad Airways
01 Apr - 22 Apr	China Eastern
23 Apr - 30 Apr	Air China

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 $846

Return flights