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

Return flights

05 Sep - 10 Sep	IndiGo
18 Sep - 23 Sep	IndiGo
10 Sep - 15 Sep	IndiGo
01 Sep - 05 Sep	IndiGo
06 Sep - 10 Sep	IndiGo
11 Sep - 14 Sep	IndiGo
13 Sep - 15 Sep	IndiGo
13 Sep - 16 Sep	IndiGo
14 Sep - 16 Sep	IndiGo
14 Sep - 17 Sep	IndiGo
30 Sep - 01 Oct	SriLankan Airlines	direct
27 Sep - 05 Oct	IndiGo
27 Sep - 05 Oct	SriLankan Airlines	direct

Also check the deals for one-way flights from Kochi 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 Kochi to Colombo in September from 174€

Return flights