Viterbo to Frosinone 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 Frosinone every about 2 hours on average. If travelling with Trenitalia, you need to know the Viterbo to Frosinone train schedule: the first train leaves at 07:03, while the last ride is at 18:34. A Viterbo to Frosinone train cost about 10.7 €. But how long is the train ride from Viterbo to Frosinone? Your journey takes about 4 hours on average. Thanks to Trenitalia, offers, you can save on your trip from Viterbo to Frosinone and find low cost tickets starting from 10 €!