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

Return flights

15 Sep - 26 Sep	Pegasus Airlines
16 Sep - 03 Oct	Ryanair
20 Sep - 06 Oct	Ryanair
20 Sep - 03 Oct	Ryanair
09 Sep - 22 Sep	Ryanair
08 Sep - 22 Sep	Ryanair
08 Sep - 19 Sep	Ryanair
22 Sep - 20 Oct	Pegasus Airlines
01 Sep - 15 Sep	Ryanair
24 Sep - 01 Oct	Pegasus Airlines
13 Sep - 26 Sep	Ryanair
15 Sep - 01 Oct	Pegasus Airlines
20 Sep - 08 Oct	Ryanair
23 Sep - 03 Oct	Ryanair
01 Sep - 12 Sep	Ryanair
16 Sep - 27 Sep	Ryanair
08 Sep - 12 Sep	Ryanair
21 Sep - 07 Oct	Ryanair
27 Sep - 11 Oct	Ryanair
15 Sep - 25 Sep	Pegasus Airlines

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 466€

Return flights