| Koblenz to Obernburg am Main | 77.26 mi (124.34 km) |
| Koblenz to Obernkirchen | 147.18 mi (236.87 km) |
| Koblenz to Oberschleissheim | 230.64 mi (371.17 km) |
| Koblenz to Oberstdorf | 237.42 mi (382.09 km) |
| Koblenz to Obertraubling | 225.85 mi (363.47 km) |
| Koblenz to Obertshausen | 58.26 mi (93.76 km) |
| Koblenz to Oberursel | 44.56 mi (71.71 km) |
| Koblenz to Ochsenfurt | 120.10 mi (193.28 km) |
| Koblenz to Ochsenhausen | 190.32 mi (306.30 km) |
| Koblenz to Ochtrup | 128.75 mi (207.20 km) |
| Koblenz to Odenthal | 51.08 mi (82.21 km) |
| Koblenz to Oelde | 104.60 mi (168.33 km) |
| Koblenz to Oelsnitz | 201.28 mi (323.93 km) |
| Koblenz to Oer-Erkenschwick | 89.89 mi (144.66 km) |
| Koblenz to Oerlinghausen | 120.30 mi (193.61 km) |
