Casalnuovo di Napoli 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 Casalnuovo di Napoli and arrive at Trieste Centrale every about 1 hour on average. If travelling with Trenitalia, you need to know the Casalnuovo di Napoli to Trieste train schedule: the first train leaves at 06:22, while the last ride is at 16:18. A Casalnuovo di Napoli to Trieste train cost about 111.5 €. But how long is the train ride from Casalnuovo di Napoli to Trieste? Your journey takes about 8 hours on average.