| San Martin de la Vega to Orbetello | 781.40 mi (1,257.54 km) |
| San Martin de la Vega to Oria | 1,114.01 mi (1,792.83 km) |
| San Martin de la Vega to Oristano | 643.11 mi (1,034.98 km) |
| San Martin de la Vega to Orta Nova | 1,009.93 mi (1,625.33 km) |
| San Martin de la Vega to Orte | 841.06 mi (1,353.56 km) |
| San Martin de la Vega to Ortona | 943.00 mi (1,517.61 km) |
| San Martin de la Vega to Orvieto | 828.98 mi (1,334.12 km) |
| San Martin de la Vega to Orzinuovi | 771.48 mi (1,241.57 km) |
| San Martin de la Vega to Osimo | 904.73 mi (1,456.02 km) |
| San Martin de la Vega to Ospitaletto | 781.93 mi (1,258.39 km) |
| San Martin de la Vega to Ostuni | 1,109.86 mi (1,786.15 km) |
| San Martin de la Vega to Ottaviano | 947.25 mi (1,524.45 km) |
| San Martin de la Vega to Ovada | 693.31 mi (1,115.78 km) |
| San Martin de la Vega to Ozieri | 661.66 mi (1,064.84 km) |
| San Martin de la Vega to Paceco | 876.81 mi (1,411.08 km) |
