| Oberhausen-Rheinhausen to Novi di Modena | 322.40 mi (518.86 km) |
| Oberhausen-Rheinhausen to Novi Ligure | 311.34 mi (501.05 km) |
| Oberhausen-Rheinhausen to Nuoro | 619.35 mi (996.75 km) |
| Oberhausen-Rheinhausen to Occhiobello | 333.23 mi (536.28 km) |
| Oberhausen-Rheinhausen to Oderzo | 304.50 mi (490.05 km) |
| Oberhausen-Rheinhausen to Oggiono | 243.62 mi (392.07 km) |
| Oberhausen-Rheinhausen to Olbia | 578.61 mi (931.19 km) |
| Oberhausen-Rheinhausen to Oleggio | 253.02 mi (407.19 km) |
| Oberhausen-Rheinhausen to Olgiate Comasco | 241.31 mi (388.34 km) |
| Oberhausen-Rheinhausen to Olgiate Olona | 251.31 mi (404.45 km) |
| Oberhausen-Rheinhausen to Omegna | 233.74 mi (376.16 km) |
| Oberhausen-Rheinhausen to Opera | 270.07 mi (434.64 km) |
| Oberhausen-Rheinhausen to Oppeano | 301.42 mi (485.08 km) |
| Oberhausen-Rheinhausen to Orbassano | 297.23 mi (478.34 km) |
| Oberhausen-Rheinhausen to Orbetello | 489.15 mi (787.21 km) |
