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

Return flights

06 Sep - 17 Sep	LOT
06 Sep - 19 Sep	LOT
17 Sep - 27 Sep	LOT
07 Sep - 21 Sep	British Airways
21 Sep - 30 Sep	British Airways
10 Sep - 30 Sep	British Airways
07 Sep - 28 Sep	British Airways
15 Sep - 06 Oct	Qatar Airways
01 Sep - 20 Sep	Qatar Airways
09 Sep - 25 Sep	British Airways
02 Sep - 25 Sep	British Airways
19 Sep - 03 Oct	British Airways
19 Sep - 01 Oct	Qatar Airways
28 Sep - 08 Oct	Qatar Airways
19 Sep - 03 Oct	SriLankan Airlines	direct
19 Sep - 01 Oct	SriLankan Airlines	direct

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 $699

Return flights