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

Return flights

14 Apr - 26 Apr	Air China
30 Apr - 19 May	Air China
21 Apr - 26 Apr	Air China
09 Apr - 26 Apr	Air China
17 Apr - 26 Apr	Air China
10 Apr - 02 May	Air China
12 Apr - 28 Apr	Air China
07 Apr - 28 Apr	Air China
23 Apr - 14 May	Air China
30 Apr - 14 May	Air China
09 Apr - 25 Apr	Air China
17 Apr - 25 Apr	Air China
30 Apr - 18 May	Air China
24 Apr - 05 May	Air China
12 Apr - 25 Apr	Air China
23 Apr - 28 Apr	Air China
29 Apr - 19 May	Etihad Airways
21 Apr - 05 May	Air China
23 Apr - 05 May	Air China
17 Apr - 03 May	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 711€

Return flights