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

Return flights

12 Sep - 17 Sep	IndiGo
03 Sep - 07 Sep	IndiGo
08 Sep - 11 Sep	IndiGo
09 Sep - 12 Sep	IndiGo
09 Sep - 14 Sep	IndiGo
01 Sep - 08 Sep	IndiGo
19 Sep - 24 Sep	IndiGo
16 Sep - 21 Sep	SriLankan Airlines	direct
05 Sep - 08 Sep	SriLankan Airlines	direct
11 Sep - 19 Sep	IndiGo

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 196€

Return flights