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

Return flights

21 Dec - 30 Jan	Etihad Airways
24 Dec - 07 Jan	Gulf Air
24 Dec - 10 Jan	Etihad Airways
09 Dec - 27 Dec	Etihad Airways
29 Dec - 14 Jan	KLM
21 Dec - 29 Jan	Etihad Airways
23 Dec - 11 Jan	Etihad Airways
24 Dec - 06 Jan	Etihad Airways
26 Dec - 06 Jan	Etihad Airways
18 Dec - 11 Jan	Air India
13 Dec - 10 Jan	Air India
02 Dec - 04 Dec	Etihad Airways
04 Dec - 07 Dec	Gulf Air
22 Dec - 29 Dec	Gulf Air
02 Dec - 09 Dec	Etihad Airways
01 Dec - 06 Dec	Etihad Airways
12 Dec - 19 Dec	Etihad Airways
18 Dec - 31 Dec	Gulf Air
05 Dec - 31 Dec	Gulf Air
26 Dec - 31 Dec	Gulf Air

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 $651

Return flights