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

Return flights

02 Oct - 07 Oct	Air India
02 Oct - 14 Oct	Air India
06 Oct - 12 Oct	Air India
01 Oct - 22 Oct	Air India
07 Oct - 14 Oct	Air India
01 Oct - 12 Oct	Air India
02 Oct - 29 Oct	Air India
02 Oct - 19 Oct	Air India
01 Oct - 07 Oct	Air India
02 Oct - 22 Oct	Air India
27 Oct - 05 Nov	Air India
30 Oct - 05 Nov	Air India
27 Oct - 17 Nov	Air India
28 Oct - 04 Nov	Air India
28 Oct - 11 Nov	Air India
28 Oct - 12 Nov	Air India
27 Oct - 10 Nov	Air India
28 Oct - 10 Nov	Air India
27 Oct - 12 Nov	Air India
06 Oct - 04 Nov	Air India

Also check the deals for one-way flights from London to Colombo 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 London to Colombo in October from 426€

Return flights