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

Return flights

04 Dec - 15 Dec	Air India
01 Dec - 21 Dec	Air India
03 Dec - 09 Dec	Air India
02 Dec - 17 Dec	Air India
03 Dec - 14 Dec	Air India
01 Dec - 14 Dec	Air India
03 Dec - 15 Dec	Air India
02 Dec - 21 Dec	Air India
02 Dec - 16 Dec	Air India
04 Dec - 14 Dec	Air India
29 Dec - 28 Jan	Air India
29 Dec - 27 Jan	Air India
29 Dec - 26 Jan	Air India
29 Dec - 25 Jan	Air India
31 Dec - 25 Jan	Air India
31 Dec - 30 Jan	Air India
31 Dec - 29 Jan	Air India
29 Dec - 23 Jan	Air India
30 Dec - 30 Jan	Air India
27 Dec - 27 Jan	Air India

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.

Book a cheap hotel in Colombo

Cheap car rent in Colombo

Cheapest return flights from London to Colombo in December from 426€

Return flights