| Cloppenburg to Obernburg am Main | 213.23 mi (343.16 km) |
| Cloppenburg to Obernkirchen | 60.31 mi (97.06 km) |
| Cloppenburg to Oberschleissheim | 353.24 mi (568.48 km) |
| Cloppenburg to Oberstdorf | 388.59 mi (625.37 km) |
| Cloppenburg to Obertraubling | 322.67 mi (519.29 km) |
| Cloppenburg to Obertshausen | 195.24 mi (314.21 km) |
| Cloppenburg to Oberursel | 184.27 mi (296.55 km) |
| Cloppenburg to Ochsenfurt | 237.65 mi (382.47 km) |
| Cloppenburg to Ochsenhausen | 340.48 mi (547.94 km) |
| Cloppenburg to Ochtrup | 57.34 mi (92.28 km) |
| Cloppenburg to Odenthal | 131.66 mi (211.89 km) |
| Cloppenburg to Oelde | 70.37 mi (113.26 km) |
| Cloppenburg to Oelsnitz | 243.72 mi (392.23 km) |
| Cloppenburg to Oer-Erkenschwick | 90.04 mi (144.90 km) |
| Cloppenburg to Oerlinghausen | 66.33 mi (106.75 km) |
