Trieste 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. You can count on 11 daily rides to get from Trieste to Viterbo. If travelling with Trenitalia, you need to know the Trieste to Viterbo train schedule: the first train leaves at 08:15, while the last ride is at 20:40. A Trieste to Viterbo train cost about 57.3 €. But how long is the train ride from Trieste to Viterbo? Your journey takes about 9 hours on average.