The closest airport to Navi Mumbai is the international and domestic airport located in Mumbai city. Cabs and buses ply to and fro from the airport on a regular basis.
Buses, as well as cabs, are frequently used to travel about in and around Navi Mumbai. The roads connect via Chembur and Airoli. From Airoli, taking the Thane- Belapur road is your best option. This road links to the Mumbai- Pune express highway as well as the Sion- Panvel highway.
Navi Mumbai is well connected through the railways. The two main railway lines to keep in mind when travelling to and from Navi Mumbai are the Harbour Line and the Central Line.