AirHint found the following cheapest return flights from Singapore (SIN) to London (LHR) in December 2025 (see full year).

Return flights

27 Dec - 27 Jan	Malaysia Airlines
01 Dec - 04 Dec	Malaysia Airlines
21 Dec - 05 Jan	Gulf Air
01 Dec - 31 Dec	Gulf Air
18 Dec - 07 Jan	Gulf Air
27 Dec - 03 Jan	Malaysia Airlines
13 Dec - 03 Jan	Gulf Air
08 Dec - 01 Jan	AirAsia
27 Dec - 01 Jan	Gulf Air
16 Dec - 02 Jan	Gulf Air
26 Dec - 01 Jan	Malaysia Airlines
01 Dec - 08 Dec	Gulf Air
23 Dec - 07 Jan	Gulf Air
12 Dec - 28 Dec	Etihad Airways
20 Dec - 31 Dec	Gulf Air
21 Dec - 28 Dec	Gulf Air
24 Dec - 31 Dec	Gulf Air
04 Dec - 31 Dec	Gulf Air
05 Dec - 09 Dec	Etihad Airways
07 Dec - 16 Dec	Etihad Airways

Also check the deals for one-way flights from Singapore 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 Singapore to London in December from 536€

Return flights