Arpino 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 Casoria-Afragola, Napoli Centrale and arrive at Trieste Centrale, Udine every 20 minutes on average. If travelling with Trenitalia, you need to know the Arpino to Trieste train schedule: the first train leaves at 06:49, while the last ride is at 20:01. A Arpino to Trieste train cost about 69.2 €. But how long is the train ride from Arpino to Trieste? Your journey takes about 10 hours on average.