AirHint found the following cheapest return flights from Sydney (SYD) to London (LHR) in October 2025 (see full year).

Return flights

20 Oct - 24 Nov	Etihad Airways
27 Oct - 23 Nov	Scoot
26 Oct - 25 Nov	Air China
25 Oct - 11 Nov	Hainan Airlines
28 Oct - 11 Nov	Air China
23 Oct - 08 Nov	Air China
30 Oct - 06 Nov	Air China
27 Oct - 10 Nov	Scoot
23 Oct - 13 Nov	Hainan Airlines
20 Oct - 27 Oct	Etihad Airways
30 Oct - 29 Nov	Air China
21 Oct - 28 Oct	Turkish Airlines
20 Oct - 31 Oct	Etihad Airways
25 Oct - 26 Oct	Hainan Airlines
21 Oct - 30 Oct	Hainan Airlines
26 Oct - 30 Oct	Scoot
22 Oct - 31 Oct	Scoot
24 Oct - 31 Oct	VietJet Air
20 Oct - 30 Oct	Etihad Airways
21 Oct - 29 Oct	Hainan Airlines

Also check the deals for one-way flights from Sydney to London in October.

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 October from 687€

Return flights