Potenza to Sulmona 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 Centrale and arrive at Sulmona every about 2 hours on average. If travelling with Trenitalia, you need to know the Potenza to Sulmona train schedule: the first train leaves at 06:40, while the last ride is at 13:30. A Potenza to Sulmona train cost about 35.8 €. But how long is the train ride from Potenza to Sulmona? Your journey takes about 6 hours on average.