Udine to Siderno 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 Udine and arrive at Siderno every about 1 hour on average. If travelling with Trenitalia, you need to know the Udine to Siderno train schedule: the first train leaves at 06:07, while the last ride is at 21:58. A Udine to Siderno train cost about 114.6 €. But how long is the train ride from Udine to Siderno? Your journey takes about 18 hours on average.