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

Return flights

04 Dec - 09 Dec	Ryanair
09 Dec - 20 Jan	Pegasus Airlines
04 Dec - 08 Dec	Ryanair
02 Dec - 11 Dec	Pegasus Airlines
09 Dec - 17 Dec	Pegasus Airlines
04 Dec - 22 Jan	Ryanair
04 Dec - 12 Dec	Pegasus Airlines
08 Dec - 15 Dec	Pegasus Airlines
18 Dec - 11 Jan	Ryanair
04 Dec - 18 Dec	Ryanair
08 Dec - 13 Dec	Ryanair
11 Dec - 26 Dec	Ryanair
27 Dec - 18 Jan	Ryanair
27 Dec - 11 Jan	Ryanair
04 Dec - 11 Dec	Ryanair
11 Dec - 17 Jan	Ryanair
11 Dec - 24 Jan	Ryanair
20 Dec - 04 Jan	Ryanair
18 Dec - 05 Jan	Ryanair
21 Dec - 07 Jan	Pegasus Airlines

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.

Book a cheap hotel in Singapore

Cheap car rent in Singapore

Cheapest return flights from London to Singapore in December from $626

Return flights