Mentana to Trapani 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 Trapani every about 6 hours on average. If travelling with Trenitalia, you need to know the Mentana to Trapani train schedule: the first train leaves at 06:32, while the last ride is at 20:32. A Mentana to Trapani train cost about 131.6 €. But how long is the train ride from Mentana to Trapani? Your journey takes about 17 hours on average.