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

Return flights

14 Oct - 21 Oct	Air India
07 Oct - 14 Oct	Air India
06 Oct - 13 Oct	Air India
20 Oct - 27 Oct	Air India
11 Oct - 18 Oct	FitsAir
20 Oct - 24 Nov	Air India
08 Oct - 10 Nov	Air India
01 Oct - 08 Oct	Air India
02 Oct - 07 Oct	Air India
02 Oct - 09 Oct	Air India
08 Oct - 21 Oct	Air India
01 Oct - 10 Oct	Air India
15 Oct - 16 Nov	Air India
19 Oct - 09 Nov	Air India
29 Oct - 05 Nov	Air India
11 Oct - 01 Nov	Air India
10 Oct - 01 Nov	Air India
27 Oct - 01 Nov	Air India
30 Oct - 06 Nov	Etihad Airways
26 Oct - 06 Nov	Air India

Also check the deals for one-way flights from Colombo to London in October.

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 October from $669

Return flights