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

Return flights

22 Sep - 29 Sep	IndiGo
23 Sep - 30 Sep	Air Arabia
23 Sep - 29 Sep	Air Arabia
20 Sep - 01 Oct	Air Arabia Abu Dhabi
25 Sep - 08 Oct	Air Arabia
20 Sep - 27 Sep	Air Arabia Abu Dhabi
25 Sep - 04 Oct	Etihad Airways
21 Sep - 22 Sep	Etihad Airways
23 Sep - 15 Oct	Air Arabia
24 Sep - 15 Oct	Air Arabia
21 Sep - 01 Oct	Etihad Airways
21 Sep - 24 Sep	Etihad Airways
25 Sep - 03 Oct	Etihad Airways
21 Sep - 28 Sep	Etihad Airways
22 Sep - 01 Oct	SriLankan Airlines
23 Sep - 28 Sep	Air Arabia
21 Sep - 25 Sep	Etihad Airways
25 Sep - 22 Oct	Air Arabia
29 Sep - 12 Oct	Air Arabia
19 Sep - 26 Sep	Air Arabia

Also check the deals for one-way flights from Colombo to London 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 Colombo to London in September from 445€

Return flights