Treviglio to Portici 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 Treviglio and arrive at Portici-Ercolano every 60 minutes on average. If travelling with Trenitalia, you need to know the Treviglio to Portici train schedule: the first train leaves at 06:02, while the last ride is at 21:56. A Treviglio to Portici train cost about 87.7 €. But how long is the train ride from Treviglio to Portici? Your journey takes about 8 hours on average.