| Hillerod to Navodari | 1,073.90 mi (1,728.27 km) |
| Hillerod to Negresti-Oas | 729.42 mi (1,173.88 km) |
| Hillerod to Nehoiu | 950.31 mi (1,529.38 km) |
| Hillerod to Ocna Mures | 825.34 mi (1,328.25 km) |
| Hillerod to Odobesti | 948.71 mi (1,526.79 km) |
| Hillerod to Odorheiu Secuiesc | 868.23 mi (1,397.28 km) |
| Hillerod to Oltenita | 1,032.21 mi (1,661.18 km) |
| Hillerod to Onesti | 913.02 mi (1,469.37 km) |
| Hillerod to Oradea | 737.07 mi (1,186.20 km) |
| Hillerod to Orastie | 840.68 mi (1,352.94 km) |
| Hillerod to Oravita | 856.20 mi (1,377.93 km) |
| Hillerod to Orsova | 890.87 mi (1,433.72 km) |
| Hillerod to Otelu Rosu | 841.00 mi (1,353.46 km) |
| Hillerod to Otopeni | 990.15 mi (1,593.50 km) |
| Hillerod to Ovidiu | 1,075.22 mi (1,730.40 km) |
