Acerra 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 Acerra and arrive at Trieste Centrale every about 2 hours on average. If travelling with Trenitalia, you need to know the Acerra to Trieste train schedule: the first train leaves at 04:38, while the last ride is at 14:52. A Acerra to Trieste train cost about 94.5 €. But how long is the train ride from Acerra to Trieste? Your journey takes about 9 hours on average.