Grottaglie 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 Grottaglie and arrive at Trieste Centrale every about 2 hours on average. If travelling with Trenitalia, you need to know the Grottaglie to Trieste train schedule: the first train leaves at 06:29, while the last ride is at 15:13. A Grottaglie to Trieste train cost about 91.45 €. But how long is the train ride from Grottaglie to Trieste? Your journey takes about 14 hours on average.