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

Return flights

28 Sep - 30 Sep	Etihad Airways
06 Sep - 15 Sep	Etihad Airways
12 Sep - 22 Sep	Etihad Airways
09 Sep - 22 Sep	Etihad Airways
15 Sep - 27 Sep	Etihad Airways
08 Sep - 22 Sep	Etihad Airways
13 Sep - 22 Sep	Etihad Airways
17 Sep - 28 Sep	Etihad Airways
05 Sep - 13 Sep	Etihad Airways
01 Sep - 23 Sep	Air India
24 Sep - 08 Oct	Air India
15 Sep - 15 Oct	Air India
15 Sep - 06 Oct	Air India
22 Sep - 13 Oct	Air India
21 Sep - 13 Oct	Air India
07 Sep - 07 Oct	Air India
21 Sep - 05 Oct	Air India
16 Sep - 06 Oct	Air India
08 Sep - 15 Oct	Etihad Airways
07 Sep - 15 Oct	Etihad Airways

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 $783

Return flights