| Ovar to Orbetello | 1,027.92 mi (1,654.28 km) |
| Ovar to Oria | 1,371.29 mi (2,206.88 km) |
| Ovar to Oristano | 907.47 mi (1,460.43 km) |
| Ovar to Orta Nova | 1,263.80 mi (2,033.88 km) |
| Ovar to Orte | 1,087.72 mi (1,750.52 km) |
| Ovar to Ortona | 1,190.67 mi (1,916.20 km) |
| Ovar to Orvieto | 1,073.46 mi (1,727.56 km) |
| Ovar to Orzinuovi | 984.50 mi (1,584.40 km) |
| Ovar to Osimo | 1,143.33 mi (1,840.01 km) |
| Ovar to Ospitaletto | 993.40 mi (1,598.72 km) |
| Ovar to Ostuni | 1,366.08 mi (2,198.50 km) |
| Ovar to Ottaviano | 1,204.17 mi (1,937.93 km) |
| Ovar to Ovada | 912.59 mi (1,468.67 km) |
| Ovar to Ozieri | 922.13 mi (1,484.02 km) |
| Ovar to Paceco | 1,145.07 mi (1,842.81 km) |
