Valenza 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 Valenza and arrive at Viterbo Porta Fiorentina every about 2 hours on average. If travelling with Trenitalia, you need to know the Valenza to Viterbo train schedule: the first train leaves at 06:58, while the last ride is at 14:54. A Valenza to Viterbo train cost about 62.7 €. But how long is the train ride from Valenza to Viterbo? Your journey takes about 10 hours on average.