| Petrovaradin to Orbetello | 472.63 mi (760.62 km) |
| Petrovaradin to Oria | 347.09 mi (558.59 km) |
| Petrovaradin to Oristano | 681.24 mi (1,096.35 km) |
| Petrovaradin to Orta Nova | 341.95 mi (550.31 km) |
| Petrovaradin to Orte | 419.36 mi (674.89 km) |
| Petrovaradin to Ortona | 338.20 mi (544.29 km) |
| Petrovaradin to Orvieto | 423.19 mi (681.06 km) |
| Petrovaradin to Orzinuovi | 482.35 mi (776.27 km) |
| Petrovaradin to Osimo | 337.98 mi (543.93 km) |
| Petrovaradin to Ospitaletto | 475.27 mi (764.87 km) |
| Petrovaradin to Ostuni | 332.69 mi (535.41 km) |
| Petrovaradin to Ottaviano | 407.81 mi (656.30 km) |
| Petrovaradin to Ovada | 549.89 mi (884.96 km) |
| Petrovaradin to Ozieri | 636.42 mi (1,024.21 km) |
| Petrovaradin to Paceco | 627.85 mi (1,010.42 km) |
