Viterbo to Genzano di Roma 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 Viterbo Porta Fiorentina and arrive at Lanuvio every about 1 hour on average. If travelling with Trenitalia, you need to know the Viterbo to Genzano di Roma train schedule: the first train leaves at 07:03, while the last ride is at 18:34. A Viterbo to Genzano di Roma train cost about 8.2 €. But how long is the train ride from Viterbo to Genzano di Roma? Your journey takes about 5 hours on average.