Terni to Castelvetrano 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 Terni, Trapani and arrive at Castelvetrano, Roma Termini every 30 minutes on average. If travelling with Trenitalia, you need to know the Terni to Castelvetrano train schedule: the first train leaves at 07:33, while the last ride is at 22:25. A Terni to Castelvetrano train cost about 5 €. But how long is the train ride from Terni to Castelvetrano? Your journey takes about 5 hours on average.