| Krefeld to Novi di Modena | 487.60 mi (784.71 km) |
| Krefeld to Novi Ligure | 465.59 mi (749.29 km) |
| Krefeld to Nuoro | 772.59 mi (1,243.37 km) |
| Krefeld to Occhiobello | 499.45 mi (803.79 km) |
| Krefeld to Oderzo | 469.37 mi (755.38 km) |
| Krefeld to Oggiono | 403.96 mi (650.11 km) |
| Krefeld to Olbia | 733.14 mi (1,179.87 km) |
| Krefeld to Oleggio | 407.24 mi (655.40 km) |
| Krefeld to Olgiate Comasco | 398.81 mi (641.82 km) |
| Krefeld to Olgiate Olona | 407.82 mi (656.32 km) |
| Krefeld to Omegna | 386.15 mi (621.44 km) |
| Krefeld to Opera | 428.65 mi (689.85 km) |
| Krefeld to Oppeano | 467.50 mi (752.37 km) |
| Krefeld to Orbassano | 439.35 mi (707.07 km) |
| Krefeld to Orbetello | 652.16 mi (1,049.54 km) |
