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

Return flights

04 Dec - 14 Dec	Pegasus Airlines
03 Dec - 15 Dec	Pegasus Airlines
04 Dec - 10 Dec	Pegasus Airlines
04 Dec - 13 Dec	Pegasus Airlines
01 Dec - 08 Dec	Ryanair
03 Dec - 13 Dec	Pegasus Airlines
07 Dec - 22 Dec	Pegasus Airlines
09 Dec - 13 Dec	Pegasus Airlines
02 Dec - 08 Dec	Ryanair
04 Dec - 12 Dec	Pegasus Airlines
07 Dec - 21 Jan	Ryanair
30 Dec - 13 Jan	Ryanair
11 Dec - 10 Jan	Pegasus Airlines
29 Dec - 13 Jan	Ryanair
12 Dec - 11 Jan	Pegasus Airlines
07 Dec - 07 Jan	Pegasus Airlines
15 Dec - 12 Jan	Ryanair
28 Dec - 15 Jan	Royal Jordanian
10 Dec - 01 Jan	Pegasus Airlines
31 Dec - 17 Jan	Ryanair

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 552€

Return flights