| Ziar nad Hronom to Orbetello | 562.80 mi (905.74 km) |
| Ziar nad Hronom to Oria | 561.80 mi (904.14 km) |
| Ziar nad Hronom to Oristano | 784.64 mi (1,262.75 km) |
| Ziar nad Hronom to Orta Nova | 524.16 mi (843.55 km) |
| Ziar nad Hronom to Orte | 526.15 mi (846.76 km) |
| Ziar nad Hronom to Ortona | 481.73 mi (775.26 km) |
| Ziar nad Hronom to Orvieto | 519.73 mi (836.42 km) |
| Ziar nad Hronom to Orzinuovi | 474.37 mi (763.43 km) |
| Ziar nad Hronom to Osimo | 436.50 mi (702.49 km) |
| Ziar nad Hronom to Ospitaletto | 463.09 mi (745.27 km) |
| Ziar nad Hronom to Ostuni | 546.04 mi (878.77 km) |
| Ziar nad Hronom to Ottaviano | 575.84 mi (926.72 km) |
| Ziar nad Hronom to Ovada | 555.52 mi (894.02 km) |
| Ziar nad Hronom to Ozieri | 734.16 mi (1,181.52 km) |
| Ziar nad Hronom to Paceco | 797.58 mi (1,283.58 km) |
