The cheapest way to the airport. Nothing listed is quicker.
Alibus
Alibus · ANMPickup, hours & luggage
Boards at. The Alibus stop at Piazza Garibaldi, outside Napoli Centrale — the same run also picks up earlier at Porta di Massa and Molo Beverello in the port
EUR 5.00 a ride, and the same EUR 5.00 buys either a plain single or the "UNICO Alibus integrato a tempo", valid 90 minutes from first validation on the Alibus and the rest of the urban network — ask for the integrated one. Sold on board, at the machines by the Arrivals exit, in the ANM GO and UnicoCampania apps, by contactless card, and at tobacconists near the airport, station and port. No return, group or child fare is stated; one child under six travels free with a ticketed adult. Ordinary tickets, passes and the Artecard are refused.
Luggage. The Alibus page states no luggage rule. ANM's general bus regulation carries one hand bag free and requires an extra ticket for large suitcases; whether that is applied on the Alibus is not stated.
Hours. From Piazza Garibaldi towards the airport every 5 to 16 minutes, 05:40 to 23:50.