| Puerto Real to Orbetello | 1,011.50 mi (1,627.85 km) |
| Puerto Real to Oria | 1,312.65 mi (2,112.50 km) |
| Puerto Real to Oristano | 834.60 mi (1,343.15 km) |
| Puerto Real to Orta Nova | 1,219.39 mi (1,962.43 km) |
| Puerto Real to Orte | 1,069.09 mi (1,720.53 km) |
| Puerto Real to Ortona | 1,166.48 mi (1,877.26 km) |
| Puerto Real to Orvieto | 1,060.88 mi (1,707.32 km) |
| Puerto Real to Orzinuovi | 1,037.70 mi (1,670.02 km) |
| Puerto Real to Osimo | 1,143.05 mi (1,839.56 km) |
| Puerto Real to Ospitaletto | 1,049.01 mi (1,688.21 km) |
| Puerto Real to Ostuni | 1,311.36 mi (2,110.43 km) |
| Puerto Real to Ottaviano | 1,150.95 mi (1,852.27 km) |
| Puerto Real to Ovada | 956.84 mi (1,539.88 km) |
| Puerto Real to Ozieri | 866.14 mi (1,393.92 km) |
| Puerto Real to Paceco | 1,033.81 mi (1,663.76 km) |
