| Romilly-sur-Seine to Navodari | 1,214.42 mi (1,954.41 km) |
| Romilly-sur-Seine to Negresti-Oas | 905.84 mi (1,457.82 km) |
| Romilly-sur-Seine to Nehoiu | 1,083.20 mi (1,743.24 km) |
| Romilly-sur-Seine to Ocna Mures | 949.19 mi (1,527.57 km) |
| Romilly-sur-Seine to Odobesti | 1,108.72 mi (1,784.32 km) |
| Romilly-sur-Seine to Odorheiu Secuiesc | 1,016.64 mi (1,636.13 km) |
| Romilly-sur-Seine to Oltenita | 1,130.78 mi (1,819.82 km) |
| Romilly-sur-Seine to Onesti | 1,084.90 mi (1,745.97 km) |
| Romilly-sur-Seine to Oradea | 848.35 mi (1,365.29 km) |
| Romilly-sur-Seine to Orastie | 930.13 mi (1,496.91 km) |
| Romilly-sur-Seine to Oravita | 880.69 mi (1,417.33 km) |
| Romilly-sur-Seine to Orsova | 921.19 mi (1,482.51 km) |
| Romilly-sur-Seine to Otelu Rosu | 899.06 mi (1,446.90 km) |
| Romilly-sur-Seine to Otopeni | 1,092.45 mi (1,758.13 km) |
| Romilly-sur-Seine to Ovidiu | 1,213.35 mi (1,952.69 km) |
