Treviglio 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 Treviglio and arrive at Viterbo Porta Fiorentina every about 1 hour on average. If travelling with Trenitalia, you need to know the Treviglio to Viterbo train schedule: the first train leaves at 08:13, while the last ride is at 21:56. A Treviglio to Viterbo train cost about 61.7 €. But how long is the train ride from Treviglio to Viterbo? Your journey takes about 7 hours on average.