Rieti 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 Rieti and arrive at Viterbo Porta Fiorentina every about 3 hours on average. If travelling with Trenitalia, you need to know the Rieti to Viterbo train schedule: the first train leaves at 10:36, while the last ride is at 18:25. A Rieti to Viterbo train cost about 6.9 €. But how long is the train ride from Rieti to Viterbo? Your journey takes about 5 hours on average. Thanks to Trenitalia, offers, you can save on your trip from Rieti to Viterbo and find low cost tickets starting from 6 €!