Carbonia to Cagliari 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 Carbonia Serbariu and arrive at Cagliari every about 1 hour on average. If travelling with Trenitalia, you need to know the Carbonia to Cagliari train schedule: the first train leaves at 07:10, while the last ride is at 20:10. A Carbonia to Cagliari train cost about 4.4 €. But how long is the train ride from Carbonia to Cagliari? Your journey takes about 1 hour on average. Trenitalia offers 7 direct trains between these two cities. Thanks to Trenitalia, offers, you can save on your trip from Carbonia to Cagliari and find low cost tickets starting from 4 €!