| Herdecke to Novi di Modena | 477.00 mi (767.66 km) |
| Herdecke to Novi Ligure | 463.04 mi (745.19 km) |
| Herdecke to Nuoro | 771.15 mi (1,241.04 km) |
| Herdecke to Occhiobello | 486.53 mi (782.99 km) |
| Herdecke to Oderzo | 451.63 mi (726.84 km) |
| Herdecke to Oggiono | 397.80 mi (640.20 km) |
| Herdecke to Olbia | 730.97 mi (1,176.38 km) |
| Herdecke to Oleggio | 404.47 mi (650.94 km) |
| Herdecke to Olgiate Comasco | 394.33 mi (634.61 km) |
| Herdecke to Olgiate Olona | 403.91 mi (650.03 km) |
| Herdecke to Omegna | 384.10 mi (618.14 km) |
| Herdecke to Opera | 423.65 mi (681.81 km) |
| Herdecke to Oppeano | 455.13 mi (732.47 km) |
| Herdecke to Orbassano | 441.72 mi (710.88 km) |
| Herdecke to Orbetello | 644.07 mi (1,036.52 km) |
