Mazara del Vallo 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 Mazara del Vallo and arrive at Viterbo Porta Fiorentina every about 12 hours on average. If travelling with Trenitalia, you need to know the Mazara del Vallo to Viterbo train schedule: the first train leaves at 06:36, while the last ride is at 06:36. A Mazara del Vallo to Viterbo train cost about 191.2 €. But how long is the train ride from Mazara del Vallo to Viterbo? Your journey takes about 16 hours on average.