From Roma Termini train to Rome airport, fly to Belgrade airport, then bus to Belgrade. 4hrs 32min 81€. From Roma Termini train to Venezia Mestre, train to Tarvisio Boscoverde, train to Villach Hbf, then train to Beograd. 19hrs 41min 195€. From Ara Coeli- Piazza Venezia bus to Roma Tiburtina station, train to Florence, then bus to Belgrade. 20hrs 54min 123€. From Milano- Nazionale line 71 bus to Rome, bus to Bologna, bus to Padova, then bus to Belgrade. 23hrs 46min 89€. From Roma Termini train to Ancona, train to Ancona, ferry to Split, train to Strizivojna-Vrpolje, then train to Beograd. 32hrs 50min 167€. From Rome drive to Belgrade. 13hrs 17min 248€.