Sulmona 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 Sulmona and arrive at Trieste Centrale every 60 minutes on average. If travelling with Trenitalia, you need to know the Sulmona to Trieste train schedule: the first train leaves at 05:57, while the last ride is at 15:40. A Sulmona to Trieste train cost about 73.4 €. But how long is the train ride from Sulmona to Trieste? Your journey takes about 10 hours on average.