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

Return flights

27 Dec - 15 Jan	Etihad Airways
27 Dec - 10 Jan	Gulf Air
30 Dec - 27 Jan	Turkish Airlines
30 Dec - 10 Jan	Turkish Airlines
29 Dec - 11 Jan	Gulf Air
29 Dec - 16 Jan	Gulf Air
28 Dec - 08 Jan	Hainan Airlines
31 Dec - 07 Jan	Hainan Airlines
29 Dec - 19 Jan	Turkish Airlines
31 Dec - 29 Jan	Turkish Airlines
27 Dec - 31 Dec	Finnair
30 Dec - 31 Dec	Finnair
27 Dec - 31 Dec	British Airways	direct
30 Dec - 31 Dec	British Airways	direct

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 552€

Return flights