| Grunberg to Obernburg am Main | 53.19 mi (85.60 km) |
| Grunberg to Obernkirchen | 115.36 mi (185.66 km) |
| Grunberg to Oberschleissheim | 200.45 mi (322.60 km) |
| Grunberg to Oberstdorf | 228.50 mi (367.74 km) |
| Grunberg to Obertraubling | 182.58 mi (293.83 km) |
| Grunberg to Obertshausen | 37.21 mi (59.88 km) |
| Grunberg to Oberursel | 31.96 mi (51.43 km) |
| Grunberg to Ochsenfurt | 82.19 mi (132.27 km) |
| Grunberg to Ochsenhausen | 180.34 mi (290.23 km) |
| Grunberg to Ochtrup | 134.38 mi (216.26 km) |
| Grunberg to Odenthal | 85.44 mi (137.51 km) |
| Grunberg to Oelde | 91.98 mi (148.02 km) |
| Grunberg to Oelsnitz | 141.90 mi (228.37 km) |
| Grunberg to Oer-Erkenschwick | 103.03 mi (165.81 km) |
| Grunberg to Oerlinghausen | 95.22 mi (153.24 km) |
