| Welling to Oberkirch | 407.48 mi (655.77 km) |
| Welling to Obernburg am Main | 410.88 mi (661.25 km) |
| Welling to Obernkirchen | 388.12 mi (624.62 km) |
| Welling to Oberschleissheim | 555.68 mi (894.29 km) |
| Welling to Oberstdorf | 535.10 mi (861.15 km) |
| Welling to Obertraubling | 559.50 mi (900.43 km) |
| Welling to Obertshausen | 392.94 mi (632.38 km) |
| Welling to Oberursel | 379.32 mi (610.46 km) |
| Welling to Ochsenfurt | 454.21 mi (730.98 km) |
| Welling to Ochsenhausen | 496.98 mi (799.81 km) |
| Welling to Ochtrup | 306.56 mi (493.35 km) |
| Welling to Odenthal | 304.36 mi (489.83 km) |
| Welling to Oelde | 345.50 mi (556.04 km) |
| Welling to Oelsnitz | 529.26 mi (851.76 km) |
| Welling to Oer-Erkenschwick | 306.94 mi (493.98 km) |
