| Cape Girardeau to Oberkirch | 4,657.48 mi (7,495.49 km) |
| Cape Girardeau to Obernburg am Main | 4,651.11 mi (7,485.24 km) |
| Cape Girardeau to Obernkirchen | 4,563.62 mi (7,344.44 km) |
| Cape Girardeau to Oberschleissheim | 4,802.81 mi (7,729.37 km) |
| Cape Girardeau to Oberstdorf | 4,784.80 mi (7,700.39 km) |
| Cape Girardeau to Obertraubling | 4,798.22 mi (7,721.99 km) |
| Cape Girardeau to Obertshausen | 4,631.26 mi (7,453.29 km) |
| Cape Girardeau to Oberursel | 4,616.66 mi (7,429.79 km) |
| Cape Girardeau to Ochsenfurt | 4,693.13 mi (7,552.86 km) |
| Cape Girardeau to Ochsenhausen | 4,747.04 mi (7,639.62 km) |
| Cape Girardeau to Ochtrup | 4,495.12 mi (7,234.19 km) |
| Cape Girardeau to Odenthal | 4,532.41 mi (7,294.21 km) |
| Cape Girardeau to Oelde | 4,543.31 mi (7,311.75 km) |
| Cape Girardeau to Oelsnitz | 4,742.89 mi (7,632.95 km) |
| Cape Girardeau to Oer-Erkenschwick | 4,516.56 mi (7,268.69 km) |
