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

Return flights

03 Sep - 13 Sep	Eurowings
02 Sep - 25 Sep	Eurowings
04 Sep - 22 Sep	KLM
02 Sep - 16 Sep	Eurowings
01 Sep - 21 Sep	Qatar Airways
01 Sep - 28 Sep	Qatar Airways
24 Sep - 15 Oct	Qatar Airways
09 Sep - 05 Oct	Qatar Airways
09 Sep - 23 Sep	Qatar Airways
21 Sep - 05 Oct	Qatar Airways
29 Sep - 15 Oct	Qatar Airways
28 Sep - 12 Oct	Qatar Airways
08 Sep - 24 Sep	Qatar Airways
03 Sep - 16 Sep	Eurowings
18 Sep - 30 Sep	Qatar Airways
10 Sep - 16 Oct	Qatar Airways
15 Sep - 03 Oct	Air India
19 Sep - 09 Oct	Air India
18 Sep - 09 Oct	Air India
18 Sep - 04 Oct	Qatar 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 615€

Return flights