Reaching Naples from Rome-Fiumicino airport
Take the Leonardo Express train that links the Rome-Fiumicino airport to the Rome central train station "Roma Termini". You can then take a Rome - Naples high speed train "Frecciarossa" and be in Naples central station in around 1h10min. Tickets for both connections can either be bought at the dedicated machines inside the station or online on https://www.trenitalia.com or using the Trenitalia mobile app (iOS/Android).
Reaching downtown Naples from the Naples airport
Once outside the airport, go left to find the a bus station. Take the ALIBUS shuttle (green bus) and exit at the last station which is near the Naples central train station. ALIBUS tickets are exclusively sold by the bus driver. Payment through credit/debit card accepted.
Palazzo congressi partenope from Naples central station
From the Naples central train station "Napoli Centrale" it is possible to reach the event location taking the metro line 1. From within the train station take escalator downwards then go left. Follow the pannels indications to reach Piazza Garibaldi metro station of "Linea 1" or "L1". Take the metro in the Piscinola direction and stop at Toledo station. Linea 1 tickets for this line can be bought on the machine or using the dedicated mobile app (iOS/Android). Once at Toledo, walk towards piazza del Plebiscito reaching the seaside. Palazzo Congressi Partenope is located at a 5 min walk to the right following the seafront street (lungomare).