Trentola-Ducenta to Viterbo 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 S. Marcellino-Frignano, Roma Tiburtina and arrive at Viterbo Porta Fiorentina every 60 minutes on average. If travelling with Trenitalia, you need to know the Trentola-Ducenta to Viterbo train schedule: the first train leaves at 10:50, while the last ride is at 21:46. A Trentola-Ducenta to Viterbo train cost about 6.9 €. But how long is the train ride from Trentola-Ducenta to Viterbo? Your journey takes about 4 hours on average. Trenitalia offers 2 direct trains between these two cities.