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

Return flights

06 Dec - 13 Dec	British Airways
01 Dec - 07 Dec	Etihad Airways
02 Dec - 07 Dec	Air India
01 Dec - 09 Dec	Air India
01 Dec - 08 Dec	Air India
01 Dec - 11 Dec	Etihad Airways
01 Dec - 06 Dec	Air India
09 Dec - 22 Dec	Gulf Air
01 Dec - 21 Dec	Air India
02 Dec - 18 Dec	Air India
06 Dec - 20 Jan	Etihad Airways
07 Dec - 11 Jan	British Airways
11 Dec - 10 Jan	British Airways
31 Dec - 29 Jan	Etihad Airways
25 Dec - 16 Jan	SWISS
31 Dec - 15 Jan	Etihad Airways
31 Dec - 31 Jan	Gulf Air
07 Dec - 09 Jan	British Airways
28 Dec - 26 Jan	Gulf Air
11 Dec - 22 Jan	British Airways

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 $693

Return flights