| Erkrath to Novi di Modena | 474.38 mi (763.43 km) |
| Erkrath to Novi Ligure | 454.93 mi (732.13 km) |
| Erkrath to Nuoro | 762.46 mi (1,227.07 km) |
| Erkrath to Occhiobello | 485.58 mi (781.47 km) |
| Erkrath to Oderzo | 454.30 mi (731.12 km) |
| Erkrath to Oggiono | 392.03 mi (630.92 km) |
| Erkrath to Olbia | 722.74 mi (1,163.13 km) |
| Erkrath to Oleggio | 396.46 mi (638.04 km) |
| Erkrath to Olgiate Comasco | 387.43 mi (623.50 km) |
| Erkrath to Olgiate Olona | 396.64 mi (638.33 km) |
| Erkrath to Omegna | 375.59 mi (604.45 km) |
| Erkrath to Opera | 417.13 mi (671.30 km) |
| Erkrath to Oppeano | 453.77 mi (730.27 km) |
| Erkrath to Orbassano | 430.48 mi (692.79 km) |
| Erkrath to Orbetello | 639.76 mi (1,029.60 km) |
