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

Return flights

24 Apr - 10 May	Air China
28 Apr - 12 May	Air China
23 Apr - 14 May	Air China
14 Apr - 14 May	Air China
26 Apr - 10 May	Air China
16 Apr - 02 May	Air China
26 Apr - 17 May	Air China
21 Apr - 19 May	Air China
09 Apr - 07 May	Air China
28 Apr - 07 May	Air China
07 Apr - 28 Apr	Air China
05 Apr - 20 Apr	KLM
09 Apr - 23 Apr	Scandinavian Airlines
09 Apr - 25 Apr	Scandinavian Airlines
04 Apr - 25 Apr	KLM
17 Apr - 28 Apr	Air China
02 Apr - 20 Apr	Scandinavian Airlines
10 Apr - 19 Apr	Scandinavian Airlines
16 Apr - 20 Apr	Air China
02 Apr - 19 Apr	Scandinavian Airlines

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 681€

Return flights