Erba 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 Moiana and arrive at Castelvetrano every about 3 hours on average. If travelling with Trenitalia, you need to know the Erba to Castelvetrano train schedule: the first train leaves at 15:16, while the last ride is at 18:16. A Erba to Castelvetrano train cost about 86.25 €. But how long is the train ride from Erba to Castelvetrano? Your journey takes about 12 hours on average.