| South River to Oberkirch | 3,902.39 mi (6,280.29 km) |
| South River to Obernburg am Main | 3,907.37 mi (6,288.31 km) |
| South River to Obernkirchen | 3,837.55 mi (6,175.94 km) |
| South River to Oberschleissheim | 4,054.38 mi (6,524.90 km) |
| South River to Oberstdorf | 4,027.77 mi (6,482.06 km) |
| South River to Obertraubling | 4,056.09 mi (6,527.64 km) |
| South River to Obertshausen | 3,888.36 mi (6,257.71 km) |
| South River to Oberursel | 3,874.11 mi (6,234.78 km) |
| South River to Ochsenfurt | 3,950.33 mi (6,357.44 km) |
| South River to Ochsenhausen | 3,993.41 mi (6,426.78 km) |
| South River to Ochtrup | 3,764.07 mi (6,057.69 km) |
| South River to Odenthal | 3,792.42 mi (6,103.31 km) |
| South River to Oelde | 3,811.65 mi (6,134.26 km) |
| South River to Oelsnitz | 4,010.79 mi (6,454.75 km) |
| South River to Oer-Erkenschwick | 3,781.38 mi (6,085.54 km) |
