Sarno 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 Sarno and arrive at Viterbo Porta Fiorentina every about 2 hours on average. If travelling with Trenitalia, you need to know the Sarno to Viterbo train schedule: the first train leaves at 05:40, while the last ride is at 16:19. A Sarno to Viterbo train cost about 42.1 €. But how long is the train ride from Sarno to Viterbo? Your journey takes about 5 hours on average.