| Holzminden to Navodari | 1,021.07 mi (1,643.26 km) |
| Holzminden to Negresti-Oas | 678.70 mi (1,092.26 km) |
| Holzminden to Nehoiu | 887.81 mi (1,428.79 km) |
| Holzminden to Ocna Mures | 750.51 mi (1,207.83 km) |
| Holzminden to Odobesti | 901.47 mi (1,450.77 km) |
| Holzminden to Odorheiu Secuiesc | 810.13 mi (1,303.78 km) |
| Holzminden to Oltenita | 954.77 mi (1,536.56 km) |
| Holzminden to Onesti | 870.88 mi (1,401.55 km) |
| Holzminden to Oradea | 648.30 mi (1,043.34 km) |
| Holzminden to Orastie | 747.63 mi (1,203.20 km) |
| Holzminden to Oravita | 729.58 mi (1,174.15 km) |
| Holzminden to Orsova | 769.69 mi (1,238.69 km) |
| Holzminden to Otelu Rosu | 730.93 mi (1,176.31 km) |
| Holzminden to Otopeni | 912.77 mi (1,468.96 km) |
| Holzminden to Ovidiu | 1,021.12 mi (1,643.34 km) |
