Terracina 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 Terracina and arrive at Monterotondo-Mentana every about 6 hours on average. If travelling with Trenitalia, you need to know the Terracina to Monterotondo train schedule: the first train leaves at 06:17, while the last ride is at 18:18. A Terracina to Monterotondo train cost about 8.2 €. But how long is the train ride from Terracina to Monterotondo? Your journey takes about 3 hours on average.