| Osterwieck to Oberkirch | 264.18 mi (425.15 km) |
| Osterwieck to Obernburg am Main | 162.17 mi (260.99 km) |
| Osterwieck to Obernkirchen | 70.93 mi (114.14 km) |
| Osterwieck to Oberschleissheim | 259.54 mi (417.69 km) |
| Osterwieck to Oberstdorf | 315.46 mi (507.69 km) |
| Osterwieck to Obertraubling | 216.92 mi (349.10 km) |
| Osterwieck to Obertshausen | 154.70 mi (248.96 km) |
| Osterwieck to Oberursel | 153.18 mi (246.53 km) |
| Osterwieck to Ochsenfurt | 162.56 mi (261.62 km) |
| Osterwieck to Ochsenhausen | 271.23 mi (436.51 km) |
| Osterwieck to Ochtrup | 150.61 mi (242.38 km) |
| Osterwieck to Odenthal | 167.71 mi (269.91 km) |
| Osterwieck to Oelde | 109.81 mi (176.72 km) |
| Osterwieck to Oelsnitz | 124.14 mi (199.78 km) |
| Osterwieck to Oer-Erkenschwick | 149.75 mi (241.00 km) |
