Cassino 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 Cassino and arrive at Viterbo Porta Fiorentina every about 2 hours on average. If travelling with Trenitalia, you need to know the Cassino to Viterbo train schedule: the first train leaves at 07:11, while the last ride is at 18:30. A Cassino to Viterbo train cost about 13.5 €. But how long is the train ride from Cassino to Viterbo? Your journey takes about 4 hours on average.