Portici to Trento trains might be a good value for money solution: travelling in Italy by train is often rather cheap and faster than taking a bus indeed Trains leave from Portici-Ercolano and arrive at Trento every about 2 hours on average. If travelling with Trenitalia, you need to know the Portici to Trento train schedule: the first train leaves at 07:00, while the last ride is at 15:55. A Portici to Trento train cost about 94.1 €. But how long is the train ride from Portici to Trento? Your journey takes about 8 hours on average.