Imperia 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 Imperia and arrive at Viterbo Porta Fiorentina every about 3 hours on average. If travelling with Trenitalia, you need to know the Imperia to Viterbo train schedule: the first train leaves at 05:40, while the last ride is at 10:34. A Imperia to Viterbo train cost about 74.1 €. But how long is the train ride from Imperia to Viterbo? Your journey takes about 12 hours on average.