Olbia to Niscemi 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 Roma Termini and arrive at Niscemi every about 2 hours on average. If travelling with Trenitalia, you need to know the Olbia to Niscemi train schedule: the first train leaves at 07:35, while the last ride is at 22:26. A Olbia to Niscemi train cost about 92.65 €. But how long is the train ride from Olbia to Niscemi? Your journey takes about 15 hours on average.