Mumbai's Chhatrapati Shivaji Maharaj International Airport will soon be connected to the upcoming Navi Mumbai airport via the metro

The proposed Navi Mumbai airport will soon be connected to Mumbai's Chhatrapati Shivaji Maharaj International Airport (CSMIA) by a metro line.

The anticipated construction cost of the 35 km-long Airport Express Line is Rs 15,000 crore, with a daily passenger volume of 9 lakh.

MMRDA and City and Industrial Development Corporation (CIDCO) are the two development organisations that will construct metro line 8 from Chhatrapati Shivaji Maharaj International Airport (CSMIA) to Mankhurd (11.1 km) via Delhi Metro Rail Corporation. MMRDA will also extend the line from Mankhurd to Navi Mumbai airport.

Between this airport and Mumbai's international airport, there is no mass rapid transit system (MRTS). The Metropolitan Region Development Authority's (MMRDA) master plan has included the metro for Navi Mumbai Airport since 2014.

This metro line would, according to authorities, be largely subterranean on the Mumbai side. The route from Andheri to the Eastern Express Highway in Ghatkopar is probably going to be completed underground. It will be raised from Ghatkopar to Mankhurd through the Ghatkopar-Mankhurd link road.

From the Navi Mumbai airport, commercial operations are most likely to begin in 2025.