| Mettlach to Obernburg am Main | 116.29 mi (187.15 km) |
| Mettlach to Obernkirchen | 220.94 mi (355.57 km) |
| Mettlach to Oberschleissheim | 241.54 mi (388.71 km) |
| Mettlach to Oberstdorf | 221.69 mi (356.77 km) |
| Mettlach to Obertraubling | 253.86 mi (408.55 km) |
| Mettlach to Obertshausen | 107.38 mi (172.81 km) |
| Mettlach to Oberursel | 100.97 mi (162.50 km) |
| Mettlach to Ochsenfurt | 155.83 mi (250.78 km) |
| Mettlach to Ochsenhausen | 181.34 mi (291.84 km) |
| Mettlach to Ochtrup | 189.29 mi (304.63 km) |
| Mettlach to Odenthal | 108.96 mi (175.35 km) |
| Mettlach to Oelde | 175.49 mi (282.43 km) |
| Mettlach to Oelsnitz | 255.64 mi (411.41 km) |
| Mettlach to Oer-Erkenschwick | 151.33 mi (243.54 km) |
| Mettlach to Oerlinghausen | 193.46 mi (311.35 km) |
