"SriLankan Airlines has positioned Colombo as the gateway to India, and we are continuously increasing our services there," Peter Hill, chief executive of Sri Lankan Airlines said in a statement.
"This includes the addition of more and more cities across India to our route network."
Coimbatore, near the border of Tamil Nadu and Kerala, provides a gateway for travellers from East Kerala to fly to the Middle East, Southeast Asia, and the Far East, the statement said.
A short 70-minute flight from Coimbatore, the second largest metropolis in Tamil Nadu, would bring travellers to Colombo, where the airline has rapid connections to its global network of 54 destinations in 28 countries.
SriLankan will initially operate four flights a week on Monday, Thursday, Friday and Saturday using Airbus A320 aircraft.
It already has services to three major cities in Kerala Trivandrum, Kozhikode, and Kochi; a