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

Return flights

05 Dec - 28 Jan	IndiGo
10 Dec - 10 Jan	IndiGo
23 Dec - 27 Jan	IndiGo
24 Dec - 20 Jan	Air Arabia
06 Dec - 10 Jan	Air Arabia Abu Dhabi
04 Dec - 11 Dec	IndiGo
22 Dec - 18 Jan	Air Arabia
23 Dec - 30 Dec	IndiGo
17 Dec - 16 Jan	Air Arabia
19 Dec - 01 Jan	SalamAir
06 Dec - 13 Dec	IndiGo
24 Dec - 31 Dec	Air Arabia
30 Dec - 06 Jan	Air Arabia
20 Dec - 24 Jan	SalamAir
09 Dec - 16 Dec	IndiGo
09 Dec - 15 Dec	Thai AirAsia
12 Dec - 31 Dec	Air Arabia
14 Dec - 28 Dec	IndiGo
22 Dec - 29 Dec	IndiGo
21 Dec - 28 Dec	IndiGo

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 $543

Return flights