Formia 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 Formia-Gaeta and arrive at Trapani every about 4 hours on average. If travelling with Trenitalia, you need to know the Formia to Trapani train schedule: the first train leaves at 22:44, while the last ride is at 23:40. A Formia to Trapani train cost about 67.0 €. But how long is the train ride from Formia to Trapani? Your journey takes about 16 hours on average.