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

Return flights

01 Dec - 11 Dec	Etihad Airways
09 Dec - 13 Jan	British Airways
06 Dec - 20 Jan	Etihad Airways
02 Dec - 11 Dec	Etihad Airways
02 Dec - 09 Dec	Air India
01 Dec - 14 Dec	Air India
01 Dec - 17 Dec	Air India
01 Dec - 15 Dec	Air India
02 Dec - 16 Dec	Air India
01 Dec - 31 Jan	Etihad Airways
01 Dec - 13 Dec	Air India
03 Dec - 10 Dec	Air India
01 Dec - 20 Dec	Air India
18 Dec - 03 Jan	KLM
10 Dec - 26 Jan	British Airways
01 Dec - 03 Jan	Air India
04 Dec - 22 Jan	Etihad Airways
31 Dec - 07 Jan	Scandinavian Airlines
31 Dec - 29 Jan	Etihad Airways
09 Dec - 09 Jan	Turkish Airlines

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 589€

Return flights