Desio 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 Desio and arrive at Viterbo Porta Fiorentina every about 2 hours on average. If travelling with Trenitalia, you need to know the Desio to Viterbo train schedule: the first train leaves at 07:24, while the last ride is at 22:15. A Desio to Viterbo train cost about 60.9 €. But how long is the train ride from Desio to Viterbo? Your journey takes about 8 hours on average.