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

Return flights

21 Apr - 12 May	Scoot
25 Apr - 12 May	Air China
26 Apr - 12 May	Air China
01 Apr - 18 Apr	Turkish Airlines
08 Apr - 12 Apr	Turkish Airlines
03 Apr - 25 Apr	Turkish Airlines
03 Apr - 22 Apr	Turkish Airlines
03 Apr - 24 Apr	Turkish Airlines
03 Apr - 13 Apr	Turkish Airlines
05 Apr - 12 Apr	Turkish Airlines
03 Apr - 23 Apr	Turkish Airlines
01 Apr - 23 Apr	Turkish Airlines
01 Apr - 30 Apr	Turkish Airlines
28 Apr - 06 May	Turkish Airlines
24 Apr - 16 May	Turkish Airlines
26 Apr - 13 May	Turkish Airlines
19 Apr - 03 May	Turkish Airlines
16 Apr - 21 May	Qatar Airways
21 Apr - 21 May	Air China
27 Apr - 12 May	Singapore Airlines

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 $1035

Return flights