| Ostwald to Obernburg am Main | 109.93 mi (176.92 km) |
| Ostwald to Obernkirchen | 264.03 mi (424.92 km) |
| Ostwald to Oberschleissheim | 177.95 mi (286.39 km) |
| Ostwald to Oberstdorf | 142.46 mi (229.27 km) |
| Ostwald to Obertraubling | 204.83 mi (329.63 km) |
| Ostwald to Obertshausen | 116.23 mi (187.05 km) |
| Ostwald to Oberursel | 120.58 mi (194.05 km) |
| Ostwald to Ochsenfurt | 130.74 mi (210.41 km) |
| Ostwald to Ochsenhausen | 107.88 mi (173.61 km) |
| Ostwald to Ochtrup | 253.55 mi (408.05 km) |
| Ostwald to Odenthal | 173.56 mi (279.31 km) |
| Ostwald to Oelde | 227.60 mi (366.28 km) |
| Ostwald to Oelsnitz | 237.78 mi (382.67 km) |
| Ostwald to Oer-Erkenschwick | 214.56 mi (345.29 km) |
| Ostwald to Oerlinghausen | 239.72 mi (385.78 km) |
