Trento 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 Trento and arrive at Viterbo Porta Fiorentina every about 4 hours on average. If travelling with Trenitalia, you need to know the Trento to Viterbo train schedule: the first train leaves at 22:16, while the last ride is at 22:16. A Trento to Viterbo train cost about 46.2 €. But how long is the train ride from Trento to Viterbo? Your journey takes about 9 hours on average.