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

Return flights

07 Dec - 21 Dec	Gulf Air
07 Dec - 22 Jan	Gulf Air
07 Dec - 12 Dec	Gulf Air
09 Dec - 23 Dec	Qatar Airways
30 Dec - 29 Jan	Eurowings
31 Dec - 22 Jan	Eurowings
10 Dec - 24 Dec	Scandinavian Airlines
07 Dec - 16 Dec	Gulf Air
09 Dec - 25 Dec	Qatar Airways
08 Dec - 26 Jan	Vueling Airlines
09 Dec - 18 Dec	Qatar Airways
31 Dec - 14 Jan	Gulf Air
10 Dec - 17 Dec	Qatar Airways
10 Dec - 16 Dec	Qatar Airways
10 Dec - 22 Jan	Scandinavian Airlines
07 Dec - 13 Dec	Aegean Airlines
30 Dec - 22 Jan	Turkish Airlines
31 Dec - 20 Jan	Eurowings
12 Dec - 22 Jan	Aer Lingus
29 Dec - 31 Jan	Eurowings

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 $751

Return flights