To get from Siderno Superiore a Gaeta by train you can catch one of the 3 trains that everyday travel between Siderno and Formia-Gaeta, the closest station to the city. For your trip from Siderno to Formia-Gaeta by train you can choose to leave from one of Siderno main stations: Siderno If travelling with Trenitalia, you need to know the Siderno to Formia-Gaeta train schedule: the first train leaves at 11:15, while the last ride is at 12:34. A Siderno to Formia-Gaeta train cost about 58.1 €. But how long is the train ride from Siderno to Formia-Gaeta? Your journey takes about 9 hours on average.