| Krefeld to Obernburg am Main | 152.96 mi (246.17 km) |
| Krefeld to Obernkirchen | 126.63 mi (203.79 km) |
| Krefeld to Oberschleissheim | 308.29 mi (496.14 km) |
| Krefeld to Oberstdorf | 318.32 mi (512.29 km) |
| Krefeld to Obertraubling | 296.92 mi (477.84 km) |
| Krefeld to Obertshausen | 132.27 mi (212.86 km) |
| Krefeld to Oberursel | 117.52 mi (189.13 km) |
| Krefeld to Ochsenfurt | 192.83 mi (310.33 km) |
| Krefeld to Ochsenhausen | 271.23 mi (436.50 km) |
| Krefeld to Ochtrup | 65.90 mi (106.06 km) |
| Krefeld to Odenthal | 31.58 mi (50.82 km) |
| Krefeld to Oelde | 76.25 mi (122.71 km) |
| Krefeld to Oelsnitz | 252.16 mi (405.82 km) |
| Krefeld to Oer-Erkenschwick | 36.36 mi (58.51 km) |
| Krefeld to Oerlinghausen | 100.10 mi (161.09 km) |
