The South-East Asian full service carrier, which also holds 49 per cent stake in Vistara along with Tata Sons who owns majority 51 per cent, flies to six Indian airports from Singapore.
"From May 17, all Singapore Airlines flights to India & South Africa will depart from Terminal 3," according to the airline's website.
Flights operated by SilkAir will remain at Terminal 2, along with all Singapore Airlines flights from Singapore to Dhaka, Colombo, Male and Dubai, it said.
Indian passengers accounted for a little over six per cent in the overall passenger traffic growth at Changi airport last year.