| Horn-Bad Meinberg to Obernburg am Main | 141.38 mi (227.54 km) |
| Horn-Bad Meinberg to Obernkirchen | 27.24 mi (43.83 km) |
| Horn-Bad Meinberg to Oberschleissheim | 276.21 mi (444.52 km) |
| Horn-Bad Meinberg to Oberstdorf | 314.61 mi (506.31 km) |
| Horn-Bad Meinberg to Obertraubling | 245.87 mi (395.69 km) |
| Horn-Bad Meinberg to Obertshausen | 125.65 mi (202.21 km) |
| Horn-Bad Meinberg to Oberursel | 117.30 mi (188.78 km) |
| Horn-Bad Meinberg to Ochsenfurt | 161.62 mi (260.09 km) |
| Horn-Bad Meinberg to Ochsenhausen | 266.90 mi (429.54 km) |
| Horn-Bad Meinberg to Ochtrup | 78.70 mi (126.66 km) |
| Horn-Bad Meinberg to Odenthal | 98.95 mi (159.25 km) |
| Horn-Bad Meinberg to Oelde | 35.02 mi (56.36 km) |
| Horn-Bad Meinberg to Oelsnitz | 171.74 mi (276.39 km) |
| Horn-Bad Meinberg to Oer-Erkenschwick | 75.24 mi (121.09 km) |
| Horn-Bad Meinberg to Oerlinghausen | 14.02 mi (22.57 km) |
