To get from Alghero a Quartu Sant'Elena by train you can catch one of the 5 trains that everyday travel between Sassari and Cagliari, the closest station to the city. For your trip from Sassari to Cagliari by train you can choose to leave from one of Sassari main stations: Sassari If travelling with Trenitalia, you need to know the Sassari to Cagliari train schedule: the first train leaves at 06:33, while the last ride is at 19:21. A Sassari to Cagliari train cost about 15.75 €. But how long is the train ride from Sassari to Cagliari? Your journey takes about 3 hours on average. Trenitalia offers 3 direct trains between these two cities.