To get from Trieste a Trentola-Ducenta by train you can catch one of the 20 trains that everyday travel between Udine and Napoli Centrale, the closest station to the city. For your trip from Udine to Napoli Centrale by train you can choose to leave from one of Udine main stations: Udine, Trieste Centrale If travelling with Trenitalia, you need to know the Udine to Napoli Centrale train schedule: the first train leaves at 04:31, while the last ride is at 22:07. A Udine to Napoli Centrale train cost about 89.65 €. But how long is the train ride from Udine to Napoli Centrale? Your journey takes about 8 hours on average.