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

Return flights

02 Dec - 05 Dec	Air India
05 Dec - 13 Dec	Shenzhen Airlines
01 Dec - 30 Dec	Shenzhen Airlines
04 Dec - 10 Dec	China Eastern
05 Dec - 11 Dec	Shenzhen Airlines
05 Dec - 25 Dec	Shenzhen Airlines
05 Dec - 14 Dec	Shenzhen Airlines
05 Dec - 12 Dec	Shenzhen Airlines
03 Dec - 20 Dec	Shenzhen Airlines
01 Dec - 23 Dec	Shenzhen Airlines
07 Dec - 19 Jan	Air China
08 Dec - 27 Jan	Air China
08 Dec - 24 Jan	Air China
06 Dec - 14 Jan	Lufthansa
09 Dec - 15 Jan	Lufthansa
09 Dec - 14 Jan	Lufthansa
01 Dec - 12 Jan	Air China
08 Dec - 01 Jan	Hainan Airlines
04 Dec - 18 Jan	Wizz Air UK
08 Dec - 14 Jan	Lufthansa

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 $469

Return flights