"Kolkata needs an alternative airport. If the West Bengal government gets a land, it can happen," he said during a media interaction here.
Currently, the city has one airport -- the Netaji Subhas Chandra Bose International Airport at Dum Dum on the suburbs.
Mr Raju said land was a state subject and that a huge land was needed for an airport.
The Dum Dum airport is expected to reach a saturation point soon, given the way it is growing in terms of air traffic.
Asked about the greenfield airport at Andal near Durgapur, Mr Raju said its future depended on whether the airlines wanted to use it.
The minister had, last month, said the second round of bidding had drawn a "very good response" and that 17 players had come up with initial proposals.
As many as 141 initial proposals for air services, including for operating aircraft and helicopters, on 502 routes were received at the second round of auctions under the regional air connectivity scheme, the government had said.
Mr Raju said on 20-25 routes under UDAN, the operators were not seeking a viability-gap funding as the routes were very promising.