Mentana 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 Monterotondo-Mentana and arrive at Castelvetrano every about 6 hours on average. If travelling with Trenitalia, you need to know the Mentana to Castelvetrano train schedule: the first train leaves at 06:32, while the last ride is at 20:32. A Mentana to Castelvetrano train cost about 181.45 €. But how long is the train ride from Mentana to Castelvetrano? Your journey takes about 16 hours on average.