| Middelharnis to Navodari | 1,232.73 mi (1,983.89 km) |
| Middelharnis to Negresti-Oas | 896.32 mi (1,442.50 km) |
| Middelharnis to Nehoiu | 1,099.04 mi (1,768.74 km) |
| Middelharnis to Ocna Mures | 961.34 mi (1,547.12 km) |
| Middelharnis to Odobesti | 1,116.03 mi (1,796.08 km) |
| Middelharnis to Odorheiu Secuiesc | 1,023.76 mi (1,647.58 km) |
| Middelharnis to Oltenita | 1,160.79 mi (1,868.11 km) |
| Middelharnis to Onesti | 1,086.93 mi (1,749.25 km) |
| Middelharnis to Oradea | 858.19 mi (1,381.13 km) |
| Middelharnis to Orastie | 953.47 mi (1,534.45 km) |
| Middelharnis to Oravita | 924.26 mi (1,487.45 km) |
| Middelharnis to Orsova | 965.18 mi (1,553.30 km) |
| Middelharnis to Otelu Rosu | 931.73 mi (1,499.47 km) |
| Middelharnis to Otopeni | 1,119.55 mi (1,801.74 km) |
| Middelharnis to Ovidiu | 1,232.47 mi (1,983.47 km) |
