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

Return flights

01 Dec - 14 Dec	Shenzhen Airlines
03 Dec - 11 Dec	Shenzhen Airlines
04 Dec - 31 Dec	Air China
04 Dec - 08 Dec	Air India
02 Dec - 05 Dec	Air India
05 Dec - 21 Dec	Shenzhen Airlines
05 Dec - 09 Dec	Shenzhen Airlines
11 Dec - 22 Dec	easyJet
06 Dec - 13 Dec	SWISS
05 Dec - 10 Dec	Etihad Airways
30 Dec - 29 Jan	Gulf Air
30 Dec - 19 Jan	Air China
29 Dec - 12 Jan	Shenzhen Airlines
27 Dec - 22 Jan	Gulf Air
04 Dec - 01 Jan	easyJet
31 Dec - 19 Jan	Gulf Air
15 Dec - 18 Jan	Lufthansa
31 Dec - 11 Jan	Turkish Airlines
29 Dec - 11 Jan	Etihad Airways
31 Dec - 19 Jan	Singapore Airlines	direct

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 $585

Return flights