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

Return flights

04 Dec - 07 Dec	Scoot
01 Dec - 11 Dec	VietJet Air
02 Dec - 07 Dec	Batik Air Malaysia
04 Dec - 11 Dec	Scoot
04 Dec - 10 Dec	Batik Air Malaysia
04 Dec - 14 Dec	Scoot
05 Dec - 10 Dec	Jetstar
01 Dec - 08 Dec	VietJet Air
07 Dec - 30 Dec	Batik Air Malaysia
06 Dec - 30 Dec	Virgin Australia
07 Dec - 18 Jan	Scoot
28 Dec - 28 Jan	Air China
08 Dec - 25 Jan	Scoot
02 Dec - 01 Jan	Batik Air Malaysia
11 Dec - 31 Jan	VietJet Air
01 Dec - 05 Jan	VietJet Air
04 Dec - 15 Jan	Jetstar
16 Dec - 28 Jan	Air China
16 Dec - 25 Jan	Air China
06 Dec - 03 Jan	China Eastern

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

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 December from 820€

Return flights