Trentola-Ducenta to Trieste 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 S. Marcellino-Frignano, Napoli Centrale and arrive at Trieste Centrale, Venezia S. Lucia every 60 minutes on average. If travelling with Trenitalia, you need to know the Trentola-Ducenta to Trieste train schedule: the first train leaves at 06:15, while the last ride is at 18:55. A Trentola-Ducenta to Trieste train cost about 69.2 €. But how long is the train ride from Trentola-Ducenta to Trieste? Your journey takes about 10 hours on average.