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

Return flights

24 Dec - 19 Jan	IndiGo
25 Dec - 09 Jan	IndiGo
24 Dec - 09 Jan	IndiGo
24 Dec - 17 Jan	Air India
24 Dec - 18 Jan	Etihad Airways
24 Dec - 13 Jan	Air India
29 Dec - 18 Jan	Air India
26 Dec - 09 Jan	IndiGo
24 Dec - 12 Jan	IndiGo
26 Dec - 30 Dec	Air India
25 Dec - 31 Dec	IndiGo
24 Dec - 05 Jan	IndiGo
24 Dec - 31 Dec	IndiGo
27 Dec - 31 Dec	British Airways
26 Dec - 28 Dec	IndiGo
26 Dec - 29 Dec	IndiGo
28 Dec - 29 Dec	Air India
27 Dec - 29 Dec	Etihad Airways
26 Dec - 28 Dec	SriLankan Airlines	direct
27 Dec - 28 Dec	SriLankan Airlines	direct

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 592€

Return flights