| Santurce-Antiguo to Orbetello | 722.85 mi (1,163.32 km) |
| Santurce-Antiguo to Oria | 1,077.41 mi (1,733.92 km) |
| Santurce-Antiguo to Oristano | 644.61 mi (1,037.39 km) |
| Santurce-Antiguo to Orta Nova | 965.18 mi (1,553.31 km) |
| Santurce-Antiguo to Orte | 781.59 mi (1,257.85 km) |
| Santurce-Antiguo to Ortona | 884.10 mi (1,422.83 km) |
| Santurce-Antiguo to Orvieto | 764.95 mi (1,231.07 km) |
| Santurce-Antiguo to Orzinuovi | 655.37 mi (1,054.72 km) |
| Santurce-Antiguo to Osimo | 827.67 mi (1,332.01 km) |
| Santurce-Antiguo to Ospitaletto | 663.64 mi (1,068.03 km) |
| Santurce-Antiguo to Ostuni | 1,070.22 mi (1,722.36 km) |
| Santurce-Antiguo to Ottaviano | 912.17 mi (1,467.99 km) |
| Santurce-Antiguo to Ovada | 587.03 mi (944.73 km) |
| Santurce-Antiguo to Ozieri | 646.11 mi (1,039.81 km) |
| Santurce-Antiguo to Paceco | 894.54 mi (1,439.62 km) |
