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 and arrive at Castelvetrano every about 2 hours 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 19:30. A Terni to Castelvetrano train cost about 91.95 €. But how long is the train ride from Terni to Castelvetrano? Your journey takes about 16 hours on average.