| Conil de la Frontera to Orbetello | 1,015.22 mi (1,633.83 km) |
| Conil de la Frontera to Oria | 1,313.08 mi (2,113.19 km) |
| Conil de la Frontera to Oristano | 835.57 mi (1,344.71 km) |
| Conil de la Frontera to Orta Nova | 1,220.89 mi (1,964.83 km) |
| Conil de la Frontera to Orte | 1,072.50 mi (1,726.02 km) |
| Conil de la Frontera to Ortona | 1,169.30 mi (1,881.80 km) |
| Conil de la Frontera to Orvieto | 1,064.67 mi (1,713.42 km) |
| Conil de la Frontera to Orzinuovi | 1,045.24 mi (1,682.14 km) |
| Conil de la Frontera to Osimo | 1,147.32 mi (1,846.44 km) |
| Conil de la Frontera to Ospitaletto | 1,056.64 mi (1,700.49 km) |
| Conil de la Frontera to Ostuni | 1,312.03 mi (2,111.51 km) |
| Conil de la Frontera to Ottaviano | 1,152.06 mi (1,854.07 km) |
| Conil de la Frontera to Ovada | 964.15 mi (1,551.65 km) |
| Conil de la Frontera to Ozieri | 868.03 mi (1,396.96 km) |
| Conil de la Frontera to Paceco | 1,031.58 mi (1,660.16 km) |
