| Wetzlar to Oberkirch | 141.73 mi (228.09 km) |
| Wetzlar to Obernburg am Main | 57.67 mi (92.81 km) |
| Wetzlar to Obernkirchen | 120.42 mi (193.79 km) |
| Wetzlar to Oberschleissheim | 211.22 mi (339.93 km) |
| Wetzlar to Oberstdorf | 232.55 mi (374.25 km) |
| Wetzlar to Obertraubling | 197.49 mi (317.82 km) |
| Wetzlar to Obertshausen | 37.55 mi (60.42 km) |
| Wetzlar to Oberursel | 25.34 mi (40.77 km) |
| Wetzlar to Ochsenfurt | 93.97 mi (151.23 km) |
| Wetzlar to Ochsenhausen | 184.27 mi (296.55 km) |
| Wetzlar to Ochtrup | 126.53 mi (203.63 km) |
| Wetzlar to Odenthal | 68.47 mi (110.19 km) |
| Wetzlar to Oelde | 88.82 mi (142.93 km) |
| Wetzlar to Oelsnitz | 161.49 mi (259.90 km) |
| Wetzlar to Oer-Erkenschwick | 91.97 mi (148.01 km) |
