Guidonia to Trieste 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 Roma Tiburtina and arrive at Udine, Venezia S. Lucia every 60 minutes on average. If travelling with ItaloTreno, you need to know the Guidonia to Trieste train schedule: the first train leaves at 18:55, while the last ride is at 18:55. ItaloTreno offers 1 direct trains between these two cities. There are also Trenitalia trains from Guidonia to Trieste; you can compare ItaloTreno and Trenitalia with Wanderio, so that you find the best fare in a quick and simple way. A Guidonia to Trieste train ticket with Trenitalia costs 19.90 € on average and you can find rides from 17:29 to 22:59. Thanks to ItaloTreno, Trenitalia offers, you can save on your trip from Guidonia to Trieste and find low cost tickets starting from 34 €! If you need to travel this week, prices start from 95.00€ to a maximum price of 102.90€. When booking your train ticket a few weeks in advance though, you can find low cost trains from Guidonia to Trieste with fares starting from 19.90€, saving up to 79%.