Viterbo to Monterotondo 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 Viterbo Porta Fiorentina and arrive at Monterotondo-Mentana every about 1 hour on average. If travelling with Trenitalia, you need to know the Viterbo to Monterotondo train schedule: the first train leaves at 05:48, while the last ride is at 18:34. A Viterbo to Monterotondo train cost about 6.9 €. But how long is the train ride from Viterbo to Monterotondo? Your journey takes about 3 hours on average. Thanks to Trenitalia, offers, you can save on your trip from Viterbo to Monterotondo and find low cost tickets starting from 6 €!