| Melzo to Oberkirch | 218.78 mi (352.09 km) |
| Melzo to Obernburg am Main | 300.14 mi (483.03 km) |
| Melzo to Obernkirchen | 467.71 mi (752.70 km) |
| Melzo to Oberschleissheim | 215.42 mi (346.68 km) |
| Melzo to Oberstdorf | 138.18 mi (222.39 km) |
| Melzo to Obertraubling | 271.97 mi (437.69 km) |
| Melzo to Obertshausen | 316.69 mi (509.66 km) |
| Melzo to Oberursel | 327.28 mi (526.71 km) |
| Melzo to Ochsenfurt | 288.33 mi (464.02 km) |
| Melzo to Ochsenhausen | 179.49 mi (288.86 km) |
| Melzo to Ochtrup | 474.18 mi (763.12 km) |
| Melzo to Odenthal | 396.63 mi (638.31 km) |
| Melzo to Oelde | 441.37 mi (710.32 km) |
| Melzo to Oelsnitz | 362.69 mi (583.70 km) |
| Melzo to Oer-Erkenschwick | 435.73 mi (701.24 km) |
