| Tordesillas to Orbetello | 834.10 mi (1,342.35 km) |
| Tordesillas to Oria | 1,178.87 mi (1,897.21 km) |
| Tordesillas to Oristano | 719.62 mi (1,158.11 km) |
| Tordesillas to Orta Nova | 1,070.66 mi (1,723.06 km) |
| Tordesillas to Orte | 893.88 mi (1,438.56 km) |
| Tordesillas to Ortona | 996.85 mi (1,604.28 km) |
| Tordesillas to Orvieto | 879.55 mi (1,415.50 km) |
| Tordesillas to Orzinuovi | 794.60 mi (1,278.78 km) |
| Tordesillas to Osimo | 949.58 mi (1,528.21 km) |
| Tordesillas to Ospitaletto | 803.89 mi (1,293.74 km) |
| Tordesillas to Ostuni | 1,173.38 mi (1,888.37 km) |
| Tordesillas to Ottaviano | 1,011.81 mi (1,628.36 km) |
| Tordesillas to Ovada | 721.11 mi (1,160.52 km) |
| Tordesillas to Ozieri | 731.66 mi (1,177.50 km) |
| Tordesillas to Paceco | 961.66 mi (1,547.64 km) |
