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

Return flights

14 Sep - 27 Sep	Lufthansa
09 Sep - 23 Sep	Lufthansa
07 Sep - 30 Sep	Lufthansa
10 Sep - 30 Sep	Lufthansa
07 Sep - 16 Sep	Lufthansa
01 Sep - 15 Sep	Lufthansa
01 Sep - 17 Sep	Lufthansa
16 Sep - 23 Sep	Lufthansa
24 Sep - 30 Sep	Lufthansa
14 Sep - 29 Sep	Lufthansa
28 Sep - 04 Oct	Lufthansa
23 Sep - 06 Oct	Lufthansa
15 Sep - 01 Oct	KLM
14 Sep - 02 Oct	KLM
26 Sep - 10 Oct	KLM
16 Sep - 03 Oct	SWISS
19 Sep - 15 Oct	SWISS
04 Sep - 01 Oct	KLM
07 Sep - 03 Oct	KLM
23 Sep - 03 Oct	KLM

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

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 September from 842€

Return flights