AirHint found the following cheapest return flights from London (LCY) to Colombo (CMB) in May 2026 (see full year).

Return flights

01 May - 14 May	SWISS
01 May - 16 May	SWISS
01 May - 23 May	SWISS
20 May - 30 May	SWISS
20 May - 23 May	SWISS
05 May - 12 May	KLM
01 May - 09 May	SWISS
15 May - 26 May	KLM
04 May - 19 May	KLM
09 May - 23 May	KLM
15 May - 04 Jun	KLM
16 May - 01 Jun	SWISS
22 May - 05 Jun	SWISS
13 May - 12 Jun	KLM
11 May - 01 Jun	KLM
23 May - 05 Jun	KLM
22 May - 02 Jun	Lufthansa
01 May - 01 Jun	KLM
18 May - 01 Jun	KLM
22 May - 07 Jun	SWISS

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

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 May from 759€

Return flights