Aosta 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 Aosta and arrive at Viterbo Porta Fiorentina every about 2 hours on average. If travelling with Trenitalia, you need to know the Aosta to Viterbo train schedule: the first train leaves at 05:16, while the last ride is at 12:26. A Aosta to Viterbo train cost about 84.9 €. But how long is the train ride from Aosta to Viterbo? Your journey takes about 10 hours on average.