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

Return flights

25 Oct - 31 Oct	Air India
22 Oct - 29 Oct	IndiGo
20 Oct - 05 Nov	Air India
21 Oct - 05 Nov	Air India
21 Oct - 10 Nov	Air India
20 Oct - 03 Nov	Air India
23 Oct - 30 Oct	Air India
23 Oct - 04 Nov	Air India
23 Oct - 05 Nov	Air India
22 Oct - 05 Nov	Air India
21 Oct - 11 Nov	Air India
26 Oct - 10 Nov	IndiGo
27 Oct - 12 Nov	Air India
26 Oct - 29 Oct	Air India
23 Oct - 31 Oct	Air India
26 Oct - 31 Oct	IndiGo
22 Oct - 28 Oct	Air India
28 Oct - 31 Oct	IndiGo
23 Oct - 28 Oct	Air India
29 Oct - 31 Oct	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 545€

Return flights