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

Return flights

22 Sep - 30 Sep	Gulf Air
01 Sep - 30 Sep	Gulf Air
01 Sep - 06 Oct	SWISS
24 Sep - 05 Oct	SWISS
08 Sep - 30 Sep	Gulf Air
10 Sep - 30 Sep	Gulf Air
15 Sep - 05 Oct	Gulf Air
29 Sep - 20 Oct	SWISS
15 Sep - 23 Sep	Air India
09 Sep - 23 Sep	Air India
23 Sep - 30 Sep	Air India
01 Sep - 29 Sep	Air India
09 Sep - 30 Sep	Aegean Airlines
21 Sep - 30 Sep	Air India
21 Sep - 01 Oct	Air India
10 Sep - 08 Oct	Air India
24 Sep - 19 Oct	Gulf Air
17 Sep - 01 Oct	Air India
23 Sep - 19 Oct	SWISS
16 Sep - 07 Oct	Air India

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.

Book a cheap hotel in Colombo

Cheap car rent in Colombo

Cheapest return flights from London to Colombo in September from 584€

Return flights