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

Return flights

08 Sep - 17 Sep	Aegean Airlines
08 Sep - 19 Sep	Aegean Airlines
08 Sep - 22 Sep	Aegean Airlines
08 Sep - 21 Sep	Aegean Airlines
16 Sep - 30 Sep	Air India
21 Sep - 08 Oct	Air India
24 Sep - 01 Oct	Air India
21 Sep - 07 Oct	Air India
29 Sep - 08 Oct	Air India
23 Sep - 04 Oct	Air India
23 Sep - 11 Oct	Air India
15 Sep - 08 Oct	Air India
14 Sep - 27 Sep	Air India
09 Sep - 23 Sep	Air India
07 Sep - 28 Sep	Air India
16 Sep - 27 Sep	Air India
10 Sep - 24 Sep	Air India
22 Sep - 20 Oct	Air India
17 Sep - 04 Oct	Air India
28 Sep - 11 Oct	Air India

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 610€

Return flights