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

Return flights

07 Dec - 08 Jan	Wizz Air UK
11 Dec - 11 Jan	easyJet
03 Dec - 15 Dec	easyJet
12 Dec - 12 Jan	easyJet
10 Dec - 08 Jan	easyJet
20 Dec - 10 Jan	Wizz Air UK
12 Dec - 11 Jan	easyJet
11 Dec - 18 Dec	Wizz Air UK
03 Dec - 14 Dec	Wizz Air UK
23 Dec - 30 Dec	Wizz Air UK
18 Dec - 25 Dec	Wizz Air UK
19 Dec - 26 Dec	Wizz Air UK

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 $747

Return flights