Mentana to Alcamo 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 Alcamo Diramazione every about 12 hours on average. If travelling with Trenitalia, you need to know the Mentana to Alcamo train schedule: the first train leaves at 20:32, while the last ride is at 20:32. A Mentana to Alcamo train cost about 126.95 €. But how long is the train ride from Mentana to Alcamo? Your journey takes about 16 hours on average.