Rieti 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 Rieti and arrive at Trieste Centrale every about 2 hours on average. If travelling with Trenitalia, you need to know the Rieti to Trieste train schedule: the first train leaves at 06:10, while the last ride is at 16:23. A Rieti to Trieste train cost about 61.1 €. But how long is the train ride from Rieti to Trieste? Your journey takes about 8 hours on average.