Buses from Sorrento to the Amalfi Coast are run by the Italian bus company Sita. Sita runs regular buses from Sorrento to coastal cities like Amalfi and Positano, and hilltop cities like Praiano and Ravello.
Buses leave from the Sorrento bus stop by the wall down the steps opposite the Sorrento Circumvesuviana train station. It is easy to make a connection if you take a bus or train or taxi from Naples to Sorrento.
Buses leave Sorrento for the Amalfi Coast towns around every 30 minutes on weekdays, and less often on weekends and holidays. Sita bus schedules vary by the season, so make sure to check before you travel. During the peak season buses fill up quickly, so queue up in advance if you want to get a seat on the bus.
Buses are air conditioned and comfortable, but the drive is along curvy roads, so sit in the front if you are prone to motion sickness.
Bus tickets from Sorrento to Amalfi Coast towns can be purchased at the magazine store at the Sorrento train station. Tickets cost 7.20 EUR for a 24 hour pass that allows you to travel on any Sita bus along the Amalfi Coast. Tickets must be stamped in the machine when you board the bus.