Positano is the first town you reach on the Amalfi Coast when arriving from Naples, and it's about a 20-minute drive from the Sorrentine Peninsula and about 30 minutes from Capri by ferry. After Positano, the next towns are Praiano, Conca de' Marini, Amalfi, and the other villages along the coast.
You can reach Positano by bus from Sorrento or Amalfi (there are two stops: "La Sponda" and "Chiesa Nuova"). There are also ferries in the summer from Sorrento and Capri.
How to Get to the Amalfi Coast