Monterotondo to Venice 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 Venezia S. Lucia every 60 minutes on average. If travelling with Trenitalia, you need to know the Monterotondo to Venice train schedule: the first train leaves at 06:17, while the last ride is at 22:29. A Monterotondo to Venice train cost about 48.6 €. But how long is the train ride from Monterotondo to Venice? Your journey takes about 5 hours on average.