Public bus from Napels to Sorrento
On walking distance from the cruise terminal, is a SITA bus station. It's located at Nuova Marina. The bus company offers trips including to Sorrento and other places along the Amalfi coast. You can buy a ticket in the same office as from the ferries.
TIP: If you plan to use the public transport more often consider a day ticket. Unicocampania offers several possibilities. With a combined day ticket you can make unlimited use of the various bus, metro and train companies (including Circumvesuviana) in the region around Naples. A day pass including Naples, Pompeii and all important places along the Amalfi coast costs € 12 per person. At weekends only € 6.30 per person.