| Carballo to Orbetello | 1,007.23 mi (1,620.98 km) |
| Carballo to Oria | 1,361.48 mi (2,191.08 km) |
| Carballo to Oristano | 920.07 mi (1,480.71 km) |
| Carballo to Orta Nova | 1,249.49 mi (2,010.86 km) |
| Carballo to Orte | 1,065.92 mi (1,715.43 km) |
| Carballo to Ortona | 1,168.36 mi (1,880.29 km) |
| Carballo to Orvieto | 1,049.15 mi (1,688.44 km) |
| Carballo to Orzinuovi | 930.56 mi (1,497.59 km) |
| Carballo to Osimo | 1,110.57 mi (1,787.28 km) |
| Carballo to Ospitaletto | 937.89 mi (1,509.38 km) |
| Carballo to Ostuni | 1,354.43 mi (2,179.75 km) |
| Carballo to Ottaviano | 1,195.88 mi (1,924.59 km) |
| Carballo to Ovada | 866.28 mi (1,394.14 km) |
| Carballo to Ozieri | 925.70 mi (1,489.77 km) |
| Carballo to Paceco | 1,167.36 mi (1,878.69 km) |
