| Wadern to Oberkirch | 87.49 mi (140.80 km) |
| Wadern to Obernburg am Main | 104.12 mi (167.56 km) |
| Wadern to Obernkirchen | 213.80 mi (344.07 km) |
| Wadern to Oberschleissheim | 230.73 mi (371.33 km) |
| Wadern to Oberstdorf | 213.59 mi (343.74 km) |
| Wadern to Obertraubling | 242.05 mi (389.54 km) |
| Wadern to Obertshausen | 95.59 mi (153.84 km) |
| Wadern to Oberursel | 89.74 mi (144.42 km) |
| Wadern to Ochsenfurt | 143.63 mi (231.15 km) |
| Wadern to Ochsenhausen | 172.12 mi (277.00 km) |
| Wadern to Ochtrup | 186.32 mi (299.85 km) |
| Wadern to Odenthal | 105.37 mi (169.57 km) |
| Wadern to Oelde | 169.63 mi (272.99 km) |
| Wadern to Oelsnitz | 243.56 mi (391.97 km) |
| Wadern to Oer-Erkenschwick | 147.82 mi (237.89 km) |
