Grosseto 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 Grosseto and arrive at Castelvetrano every about 4 hours on average. If travelling with Trenitalia, you need to know the Grosseto to Castelvetrano train schedule: the first train leaves at 04:19, while the last ride is at 19:30. A Grosseto to Castelvetrano train cost about 94.65 €. But how long is the train ride from Grosseto to Castelvetrano? Your journey takes about 18 hours on average.