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

Return flights

29 Apr - 04 May	China Eastern
27 Apr - 11 May	China Eastern
29 Apr - 27 May	China Eastern
23 Apr - 17 May	Scoot
22 Apr - 13 May	China Eastern
22 Apr - 03 May	China Eastern
26 Apr - 10 May	China Eastern
25 Apr - 14 May	China Eastern
28 Apr - 12 May	China Eastern
20 Apr - 10 May	Scoot
06 Apr - 18 Apr	China Eastern
25 Apr - 30 Apr	Scoot
05 Apr - 23 Apr	AirAsia X
21 Apr - 30 Apr	Scoot
14 Apr - 21 Apr	Scoot
15 Apr - 27 Apr	Scoot
21 Apr - 27 Apr	Turkish Airlines
23 Apr - 27 Apr	Turkish Airlines
13 Apr - 26 Apr	AirAsia X
03 Apr - 07 Apr	China Southern

Also check the deals for one-way flights from Sydney to London 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 Sydney to London in April from 794€

Return flights