| Siegburg to Novi di Modena | 442.59 mi (712.28 km) |
| Siegburg to Novi Ligure | 423.85 mi (682.13 km) |
| Siegburg to Nuoro | 731.62 mi (1,177.43 km) |
| Siegburg to Occhiobello | 453.90 mi (730.49 km) |
| Siegburg to Oderzo | 423.36 mi (681.33 km) |
| Siegburg to Oggiono | 360.43 mi (580.06 km) |
| Siegburg to Olbia | 691.75 mi (1,113.26 km) |
| Siegburg to Oleggio | 365.34 mi (587.95 km) |
| Siegburg to Olgiate Comasco | 356.03 mi (572.97 km) |
| Siegburg to Olgiate Olona | 365.32 mi (587.93 km) |
| Siegburg to Omegna | 344.61 mi (554.59 km) |
| Siegburg to Opera | 385.66 mi (620.66 km) |
| Siegburg to Oppeano | 422.05 mi (679.22 km) |
| Siegburg to Orbassano | 400.63 mi (644.75 km) |
| Siegburg to Orbetello | 608.03 mi (978.52 km) |
