By early June Cathay will have added 20 new India flights per week, chief executive Tony Tyler said.
Cathay's sister airline, Dragonair, is also due to launch on May 1 a daily flight to Bangalore using an A330-300 aircraft, he said.
Cathay's services to Mumbai and Delhi will both become daily from Feb 29 with the addition of three flights a week to each city.
The extra flights to Mumbai will continue on to Dubai.
Starting March 30, Cathay will add three more flights to Mumbai, giving it 10 a week to India's commercial hub.
It will also add a daily flight to Delhi, making a total of 14 flights per week to the capital.
On June 1 Cathay will begin four-times-a-week service to Chennai, India's fourth-largest city.