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

Return flights

03 Dec - 11 Dec	Shenzhen Airlines
01 Dec - 07 Dec	Shenzhen Airlines
03 Dec - 12 Dec	Shenzhen Airlines
03 Dec - 20 Dec	Shenzhen Airlines
02 Dec - 09 Dec	Lufthansa
05 Dec - 07 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
01 Dec - 12 Dec	Shenzhen Airlines
02 Dec - 11 Dec	Lufthansa
04 Dec - 11 Dec	Lufthansa
04 Dec - 14 Jan	Lufthansa
04 Dec - 15 Jan	Lufthansa
05 Dec - 15 Jan	Lufthansa
07 Dec - 19 Jan	Etihad Airways
07 Dec - 21 Jan	Etihad Airways
06 Dec - 21 Jan	Etihad Airways
14 Dec - 21 Jan	Gulf Air
28 Dec - 30 Jan	Gulf Air
07 Dec - 15 Jan	Gulf Air
30 Dec - 15 Jan	Gulf Air

Also check the deals for one-way flights from London to Singapore 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 London to Singapore in December from 464€

Return flights