Acqui Terme 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 Acqui Terme and arrive at Viterbo Porta Fiorentina every about 1 hour on average. If travelling with Trenitalia, you need to know the Acqui Terme to Viterbo train schedule: the first train leaves at 05:20, while the last ride is at 13:16. A Acqui Terme to Viterbo train cost about 66.1 €. But how long is the train ride from Acqui Terme to Viterbo? Your journey takes about 10 hours on average.