| Holzminden to Novi di Modena | 483.84 mi (778.67 km) |
| Holzminden to Novi Ligure | 489.47 mi (787.72 km) |
| Holzminden to Nuoro | 795.49 mi (1,280.22 km) |
| Holzminden to Occhiobello | 487.18 mi (784.04 km) |
| Holzminden to Oderzo | 440.20 mi (708.43 km) |
| Holzminden to Oggiono | 417.79 mi (672.37 km) |
| Holzminden to Olbia | 754.02 mi (1,213.48 km) |
| Holzminden to Oleggio | 432.02 mi (695.27 km) |
| Holzminden to Olgiate Comasco | 418.34 mi (673.25 km) |
| Holzminden to Olgiate Olona | 428.90 mi (690.25 km) |
| Holzminden to Omegna | 413.92 mi (666.14 km) |
| Holzminden to Opera | 445.53 mi (717.01 km) |
| Holzminden to Oppeano | 458.04 mi (737.15 km) |
| Holzminden to Orbassano | 479.42 mi (771.55 km) |
| Holzminden to Orbetello | 654.03 mi (1,052.56 km) |
