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

Return flights

10 Dec - 15 Jan	IndiGo
02 Dec - 09 Dec	IndiGo
01 Dec - 08 Dec	Air Arabia
17 Dec - 04 Jan	IndiGo
05 Dec - 03 Jan	IndiGo
03 Dec - 09 Dec	IndiGo
03 Dec - 10 Dec	IndiGo
16 Dec - 03 Jan	IndiGo
04 Dec - 11 Dec	IndiGo
24 Dec - 31 Dec	Air Arabia
04 Dec - 02 Jan	Air Arabia Abu Dhabi
16 Dec - 23 Dec	IndiGo
12 Dec - 26 Jan	Air Arabia
05 Dec - 12 Dec	IndiGo
08 Dec - 03 Jan	Air Arabia
25 Dec - 08 Jan	Etihad Airways
28 Dec - 11 Jan	Air Arabia
06 Dec - 13 Dec	Air Arabia
08 Dec - 15 Dec	IndiGo
04 Dec - 13 Jan	Etihad 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 $498

Return flights