Pompei 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 Pompei and arrive at Viterbo Porta Fiorentina every about 2 hours on average. If travelling with Trenitalia, you need to know the Pompei to Viterbo train schedule: the first train leaves at 08:06, while the last ride is at 16:44. A Pompei to Viterbo train cost about 51.6 €. But how long is the train ride from Pompei to Viterbo? Your journey takes about 5 hours on average.