Grottaglie 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 Grottaglie and arrive at Viterbo Porta Fiorentina every about 2 hours on average. If travelling with Trenitalia, you need to know the Grottaglie to Viterbo train schedule: the first train leaves at 07:36, while the last ride is at 11:31. A Grottaglie to Viterbo train cost about 40.0 €. But how long is the train ride from Grottaglie to Viterbo? Your journey takes about 9 hours on average.