| Horb am Neckar to Obernburg am Main | 98.49 mi (158.50 km) |
| Horb am Neckar to Obernkirchen | 264.68 mi (425.96 km) |
| Horb am Neckar to Oberschleissheim | 132.73 mi (213.60 km) |
| Horb am Neckar to Oberstdorf | 102.59 mi (165.10 km) |
| Horb am Neckar to Obertraubling | 162.50 mi (261.52 km) |
| Horb am Neckar to Obertshausen | 112.21 mi (180.59 km) |
| Horb am Neckar to Oberursel | 121.57 mi (195.66 km) |
| Horb am Neckar to Ochsenfurt | 103.96 mi (167.31 km) |
| Horb am Neckar to Ochsenhausen | 63.31 mi (101.88 km) |
| Horb am Neckar to Ochtrup | 268.10 mi (431.46 km) |
| Horb am Neckar to Odenthal | 192.12 mi (309.20 km) |
| Horb am Neckar to Oelde | 235.31 mi (378.69 km) |
| Horb am Neckar to Oelsnitz | 207.19 mi (333.44 km) |
| Horb am Neckar to Oer-Erkenschwick | 229.93 mi (370.04 km) |
| Horb am Neckar to Oerlinghausen | 243.31 mi (391.57 km) |
