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

Return flights

02 Dec - 09 Dec	Brussels Airlines
01 Dec - 08 Dec	Scandinavian Airlines
01 Dec - 07 Dec	Air India
03 Dec - 16 Dec	Air India
01 Dec - 15 Dec	Air India
01 Dec - 22 Dec	Air India
02 Dec - 16 Dec	Air India
02 Dec - 10 Dec	Air India
04 Dec - 21 Dec	Air India
02 Dec - 15 Dec	Air India
31 Dec - 17 Jan	Kuwait Airways
31 Dec - 24 Jan	Kuwait Airways
21 Dec - 03 Jan	Aegean Airlines
01 Dec - 31 Jan	Air India
31 Dec - 26 Jan	Kuwait Airways
01 Dec - 18 Jan	Scandinavian Airlines
04 Dec - 03 Jan	Air India
30 Dec - 13 Jan	Gulf Air
09 Dec - 13 Jan	Gulf Air
31 Dec - 14 Jan	Gulf Air

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 592€

Return flights