Frosinone to Trapani 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 Frosinone and arrive at Trapani every about 6 hours on average. If travelling with Trenitalia, you need to know the Frosinone to Trapani train schedule: the first train leaves at 18:59, while the last ride is at 20:21. A Frosinone to Trapani train cost about 118.2 €. But how long is the train ride from Frosinone to Trapani? Your journey takes about 19 hours on average.