| Monchengladbach to Obernburg am Main | 151.58 mi (243.95 km) |
| Monchengladbach to Obernkirchen | 136.46 mi (219.61 km) |
| Monchengladbach to Oberschleissheim | 306.65 mi (493.51 km) |
| Monchengladbach to Oberstdorf | 313.91 mi (505.19 km) |
| Monchengladbach to Obertraubling | 297.28 mi (478.42 km) |
| Monchengladbach to Obertshausen | 131.11 mi (211.01 km) |
| Monchengladbach to Oberursel | 116.36 mi (187.27 km) |
| Monchengladbach to Ochsenfurt | 192.45 mi (309.71 km) |
| Monchengladbach to Ochsenhausen | 267.22 mi (430.04 km) |
| Monchengladbach to Ochtrup | 76.67 mi (123.39 km) |
| Monchengladbach to Odenthal | 31.80 mi (51.18 km) |
| Monchengladbach to Oelde | 85.80 mi (138.09 km) |
| Monchengladbach to Oelsnitz | 256.04 mi (412.05 km) |
| Monchengladbach to Oer-Erkenschwick | 46.63 mi (75.04 km) |
| Monchengladbach to Oerlinghausen | 109.54 mi (176.29 km) |
