Castel Volturno 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 Roma Termini, Cancello-Arnone, Roma Tiburtina and arrive at Viterbo Porta Fiorentina every 30 minutes on average. If travelling with Trenitalia, you need to know the Castel Volturno to Viterbo train schedule: the first train leaves at 05:45, while the last ride is at 21:46. A Castel Volturno to Viterbo train cost about 5.40 €. But how long is the train ride from Castel Volturno to Viterbo? Your journey takes about 3 hours on average. Trenitalia offers 6 direct trains between these two cities. If you need to travel this week, prices start from 5.40€ to a maximum price of 8.20€.