| Melfi to Oberkirch | 638.60 mi (1,027.73 km) |
| Melfi to Obernburg am Main | 686.90 mi (1,105.45 km) |
| Melfi to Obernkirchen | 837.02 mi (1,347.05 km) |
| Melfi to Oberschleissheim | 539.47 mi (868.19 km) |
| Melfi to Oberstdorf | 516.32 mi (830.94 km) |
| Melfi to Obertraubling | 575.94 mi (926.89 km) |
| Melfi to Obertshausen | 707.31 mi (1,138.30 km) |
| Melfi to Oberursel | 721.21 mi (1,160.68 km) |
| Melfi to Ochsenfurt | 655.87 mi (1,055.51 km) |
| Melfi to Ochsenhausen | 563.21 mi (906.40 km) |
| Melfi to Ochtrup | 870.81 mi (1,401.43 km) |
| Melfi to Odenthal | 803.89 mi (1,293.74 km) |
| Melfi to Oelde | 828.34 mi (1,333.09 km) |
| Melfi to Oelsnitz | 671.79 mi (1,081.14 km) |
| Melfi to Oer-Erkenschwick | 836.16 mi (1,345.67 km) |
