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

Return flights

01 Dec - 17 Dec	ITA Airways
03 Dec - 14 Dec	SWISS
03 Dec - 10 Dec	SWISS
04 Dec - 21 Dec	KLM
03 Dec - 17 Dec	SWISS
29 Dec - 06 Jan	ITA Airways
17 Dec - 21 Dec	ITA Airways
01 Dec - 04 Dec	KLM
10 Dec - 24 Dec	Lufthansa
08 Dec - 22 Dec	KLM
01 Dec - 03 Dec	KLM
31 Dec - 20 Jan	KLM
31 Dec - 24 Jan	KLM
31 Dec - 29 Jan	KLM
30 Dec - 18 Jan	KLM
15 Dec - 23 Jan	ITA Airways
31 Dec - 23 Jan	Air Dolomiti
18 Dec - 01 Jan	ITA Airways
10 Dec - 14 Jan	Air Dolomiti
31 Dec - 22 Jan	KLM

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 $837

Return flights