AirHint found the following cheapest return flights from London (LCY) to Colombo (CMB) in December 2025 (see full year).

Return flights

03 Dec - 17 Dec	SWISS
06 Dec - 07 Dec	KLM
01 Dec - 08 Dec	ITA Airways
03 Dec - 16 Dec	SWISS
30 Dec - 19 Jan	KLM
03 Dec - 14 Dec	SWISS
03 Dec - 28 Dec	ITA Airways
06 Dec - 30 Dec	ITA Airways
01 Dec - 17 Dec	SWISS
01 Dec - 15 Dec	SWISS
01 Dec - 16 Dec	SWISS
30 Dec - 26 Jan	KLM
16 Dec - 18 Jan	ITA Airways
16 Dec - 30 Jan	ITA Airways
31 Dec - 20 Jan	Lufthansa
16 Dec - 25 Jan	ITA Airways
01 Dec - 24 Jan	Lufthansa
16 Dec - 27 Jan	ITA Airways
29 Dec - 28 Jan	SWISS
29 Dec - 29 Jan	SWISS

Also check the deals for one-way flights from London to Colombo 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 Colombo in December from 696€

Return flights