Potenza to Sciacca 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 Potenza Superiore and arrive at Castelvetrano every about 6 hours on average. If travelling with Trenitalia, you need to know the Potenza to Sciacca train schedule: the first train leaves at 06:51, while the last ride is at 06:51. A Potenza to Sciacca train cost about 70.15 €. But how long is the train ride from Potenza to Sciacca? Your journey takes about 15 hours on average.