| Altensteig to Obernburg am Main | 89.94 mi (144.74 km) |
| Altensteig to Obernkirchen | 255.26 mi (410.81 km) |
| Altensteig to Oberschleissheim | 137.79 mi (221.75 km) |
| Altensteig to Oberstdorf | 112.26 mi (180.67 km) |
| Altensteig to Obertraubling | 164.29 mi (264.39 km) |
| Altensteig to Obertshausen | 102.80 mi (165.43 km) |
| Altensteig to Oberursel | 111.72 mi (179.80 km) |
| Altensteig to Ochsenfurt | 98.85 mi (159.08 km) |
| Altensteig to Ochsenhausen | 71.21 mi (114.59 km) |
| Altensteig to Ochtrup | 257.69 mi (414.72 km) |
| Altensteig to Odenthal | 181.61 mi (292.27 km) |
| Altensteig to Oelde | 225.24 mi (362.48 km) |
| Altensteig to Oelsnitz | 203.77 mi (327.94 km) |
| Altensteig to Oer-Erkenschwick | 219.48 mi (353.22 km) |
| Altensteig to Oerlinghausen | 233.57 mi (375.90 km) |
