| Gladenbach to Oestrich-Winkel | 58.96 mi (94.88 km) |
| Gladenbach to Offenburg | 161.65 mi (260.14 km) |
| Gladenbach to Oftersheim | 96.56 mi (155.39 km) |
| Gladenbach to Ohrdruf | 93.98 mi (151.25 km) |
| Gladenbach to Ohringen | 115.75 mi (186.29 km) |
| Gladenbach to Olbernhau | 207.90 mi (334.58 km) |
| Gladenbach to Olching | 215.71 mi (347.15 km) |
| Gladenbach to Oldenburg | 164.90 mi (265.38 km) |
| Gladenbach to Oldenburg in Holstein | 262.45 mi (422.37 km) |
| Gladenbach to Olfen | 83.59 mi (134.52 km) |
| Gladenbach to Olpe | 36.91 mi (59.39 km) |
| Gladenbach to Olsberg | 40.44 mi (65.08 km) |
| Gladenbach to Oranienburg | 241.68 mi (388.95 km) |
| Gladenbach to Ortenberg | 35.24 mi (56.71 km) |
| Gladenbach to Oschatz | 199.96 mi (321.80 km) |
