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

Return flights

23 Apr - 12 May	Hainan Airlines
16 Apr - 03 May	Hainan Airlines
28 Apr - 03 May	Hainan Airlines
21 Apr - 12 May	Hainan Airlines
21 Apr - 30 Apr	Air India
30 Apr - 04 May	Air India
22 Apr - 14 May	Air India
16 Apr - 23 Apr	Hainan Airlines
25 Apr - 31 May	Scoot
27 Apr - 26 May	Scoot
26 Apr - 05 May	Scoot
16 Apr - 30 Apr	Hainan Airlines
30 Apr - 25 May	Hainan Airlines
15 Apr - 19 Apr	Scoot
18 Apr - 23 Apr	Scoot
04 Apr - 28 Apr	Jetstar
01 Apr - 08 Apr	China Eastern
01 Apr - 14 Apr	China Southern
05 Apr - 29 Apr	Jetstar
17 Apr - 26 Apr	Etihad Airways

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 749€

Return flights