| Aiken to Oberkirch | 4,521.03 mi (7,275.90 km) |
| Aiken to Obernburg am Main | 4,528.61 mi (7,288.09 km) |
| Aiken to Obernkirchen | 4,461.68 mi (7,180.38 km) |
| Aiken to Oberschleissheim | 4,674.38 mi (7,522.68 km) |
| Aiken to Oberstdorf | 4,645.64 mi (7,476.44 km) |
| Aiken to Obertraubling | 4,677.41 mi (7,527.57 km) |
| Aiken to Obertshausen | 4,509.79 mi (7,257.81 km) |
| Aiken to Oberursel | 4,495.63 mi (7,235.02 km) |
| Aiken to Ochsenfurt | 4,571.69 mi (7,357.42 km) |
| Aiken to Ochsenhausen | 4,612.26 mi (7,422.71 km) |
| Aiken to Ochtrup | 4,387.64 mi (7,061.22 km) |
| Aiken to Odenthal | 4,414.54 mi (7,104.51 km) |
| Aiken to Oelde | 4,435.08 mi (7,137.57 km) |
| Aiken to Oelsnitz | 4,633.91 mi (7,457.56 km) |
| Aiken to Oer-Erkenschwick | 4,404.32 mi (7,088.06 km) |
