If you are travelling by car you can use various motorways:

From North A1 highway from Milan to Naples, then A3 from Naples to Salerno exit Castellammare di Stabia Highroad 145 (Strada statale) from Castellammare di Stabia to Sorrento, 20 kilometres

From East A16 highway from Bari to Naples, then A3 from Naples to Salerno exit Castellammare di Stabia
Highroad 145 (Strada statale) from Castellammare di Stabia to Sorrento, 20 kilometres

From South A3 highway from Reggio Calabria direction Salerno, exit Castellammare di Stabia
Highroad 145 (Strada statale) from Castellammare di Stabia to Sorrento, 20 kilometres

Traffic information:
Call center 800269269 24 hrs service
Radio 103,3 Fm traffic news in english

For those who are travelling by train you can catch the train from Naples to Sorrento, which takes 1 hour with the Circumvesuviana train.

For those who prefer to fly, there is a bus service from Naples Capodichino Airport which will take you straight to Sorrento, or booking a private transfer.
?http://www.curreriviaggi.it/inglese/E_index.html

For those of who are flying to Rome, there is a bus service that leaves twice a day, arriving and leaving from Tiburtina Station, which takes appreciatively 3.5 hours to get to Sorrento.
Mon-Sat departure from Rome at 3:00 pm. and arrival at 6:45 pm
Sunday departure from Rome at 7:00 am and arrival at 10:45 am