From Naples Airport, you can reach Amalfi by taxi, bus, or train. For example, from Naples' central station, Piazza Garibaldi, you can take a train to Salerno. Trains on this route operate hourly. From Salerno, you can then take SITA buses to Amalfi. Additionally, there are ferries and taxis available from the port of Salerno to the port of Amalfi, both by water and by land.
You can check the schedule of SITA buses for the Naples-Amalfi or Salerno-Amalfi route on their website. As for the train schedule, it can be found on the official website of the Italian railway, Trenitalia.
In addition, direct buses also run from Sorrento to Amalfi. The bus journey along the winding coastal roads offers tourists stunning natural landscapes. Buses operate approximately every half an hour.
If you plan to travel to Amalfi by car, it's important to note that traffic restrictions are implemented during the high season in Italy.