Portici to San Severo 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 S. Severo every about 3 hours on average. If travelling with Trenitalia, you need to know the Portici to San Severo train schedule: the first train leaves at 07:00, while the last ride is at 16:55. A Portici to San Severo train cost about 30.05 €. But how long is the train ride from Portici to San Severo? Your journey takes about 6 hours on average.