| Geldern to Obernburg am Main | 169.07 mi (272.09 km) |
| Geldern to Obernkirchen | 129.47 mi (208.37 km) |
| Geldern to Oberschleissheim | 324.40 mi (522.07 km) |
| Geldern to Oberstdorf | 334.63 mi (538.53 km) |
| Geldern to Obertraubling | 312.27 mi (502.54 km) |
| Geldern to Obertshausen | 148.34 mi (238.72 km) |
| Geldern to Oberursel | 133.61 mi (215.02 km) |
| Geldern to Ochsenfurt | 208.58 mi (335.68 km) |
| Geldern to Ochsenhausen | 287.57 mi (462.80 km) |
| Geldern to Ochtrup | 59.88 mi (96.37 km) |
| Geldern to Odenthal | 47.73 mi (76.82 km) |
| Geldern to Oelde | 80.83 mi (130.08 km) |
| Geldern to Oelsnitz | 264.96 mi (426.42 km) |
| Geldern to Oer-Erkenschwick | 40.33 mi (64.90 km) |
| Geldern to Oerlinghausen | 104.52 mi (168.21 km) |
