| Gladenbach to Obernburg am Main | 68.70 mi (110.56 km) |
| Gladenbach to Obernkirchen | 106.05 mi (170.67 km) |
| Gladenbach to Oberschleissheim | 219.49 mi (353.23 km) |
| Gladenbach to Oberstdorf | 244.39 mi (393.31 km) |
| Gladenbach to Obertraubling | 202.41 mi (325.74 km) |
| Gladenbach to Obertshausen | 49.70 mi (79.99 km) |
| Gladenbach to Oberursel | 39.02 mi (62.80 km) |
| Gladenbach to Ochsenfurt | 101.35 mi (163.11 km) |
| Gladenbach to Ochsenhausen | 196.11 mi (315.60 km) |
| Gladenbach to Ochtrup | 115.99 mi (186.66 km) |
| Gladenbach to Odenthal | 66.46 mi (106.96 km) |
| Gladenbach to Oelde | 75.94 mi (122.21 km) |
| Gladenbach to Oelsnitz | 159.05 mi (255.96 km) |
| Gladenbach to Oer-Erkenschwick | 83.50 mi (134.38 km) |
| Gladenbach to Oerlinghausen | 82.89 mi (133.41 km) |
