| Romans-sur-Isere to Oria | 710.17 mi (1,142.91 km) |
| Romans-sur-Isere to Oristano | 398.26 mi (640.94 km) |
| Romans-sur-Isere to Orta Nova | 594.57 mi (956.87 km) |
| Romans-sur-Isere to Orte | 407.11 mi (655.19 km) |
| Romans-sur-Isere to Ortona | 502.39 mi (808.52 km) |
| Romans-sur-Isere to Orvieto | 386.39 mi (621.84 km) |
| Romans-sur-Isere to Orzinuovi | 238.78 mi (384.28 km) |
| Romans-sur-Isere to Osimo | 430.72 mi (693.17 km) |
| Romans-sur-Isere to Ospitaletto | 246.52 mi (396.74 km) |
| Romans-sur-Isere to Ostuni | 699.87 mi (1,126.33 km) |
| Romans-sur-Isere to Ottaviano | 557.41 mi (897.07 km) |
| Romans-sur-Isere to Ovada | 178.32 mi (286.98 km) |
| Romans-sur-Isere to Ozieri | 367.50 mi (591.43 km) |
| Romans-sur-Isere to Paceco | 622.83 mi (1,002.34 km) |
| Romans-sur-Isere to Pachino | 777.74 mi (1,251.66 km) |
