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

Return flights

13 Dec - 24 Jan	IndiGo
25 Dec - 28 Jan	IndiGo
19 Dec - 31 Dec	IndiGo
22 Dec - 31 Dec	IndiGo
23 Dec - 26 Jan	Air India
05 Dec - 11 Jan	Etihad Airways
24 Dec - 11 Jan	Etihad Airways
12 Dec - 12 Jan	Etihad Airways
20 Dec - 10 Jan	IndiGo
25 Dec - 08 Jan	Etihad Airways
05 Dec - 28 Jan	Air India
03 Dec - 10 Dec	IndiGo
23 Dec - 31 Dec	Air India
24 Dec - 31 Dec	Air India
06 Dec - 10 Jan	IndiGo
16 Dec - 31 Dec	Air India
02 Dec - 09 Dec	IndiGo
13 Dec - 31 Dec	Air India
20 Dec - 31 Dec	Air India
02 Dec - 07 Dec	Qatar Airways

Also check the deals for one-way flights from Colombo to London 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 Colombo to London in December from 567€

Return flights