| Clarkston to Oberkirch | 4,612.27 mi (7,422.73 km) |
| Clarkston to Obernburg am Main | 4,616.61 mi (7,429.72 km) |
| Clarkston to Obernkirchen | 4,544.69 mi (7,313.97 km) |
| Clarkston to Oberschleissheim | 4,764.01 mi (7,666.93 km) |
| Clarkston to Oberstdorf | 4,737.71 mi (7,624.61 km) |
| Clarkston to Obertraubling | 4,765.27 mi (7,668.95 km) |
| Clarkston to Obertshausen | 4,597.52 mi (7,398.99 km) |
| Clarkston to Oberursel | 4,583.23 mi (7,376.00 km) |
| Clarkston to Ochsenfurt | 4,659.51 mi (7,498.76 km) |
| Clarkston to Ochsenhausen | 4,703.26 mi (7,569.17 km) |
| Clarkston to Ochtrup | 4,471.84 mi (7,196.73 km) |
| Clarkston to Odenthal | 4,501.25 mi (7,244.07 km) |
| Clarkston to Oelde | 4,519.54 mi (7,273.50 km) |
| Clarkston to Oelsnitz | 4,718.90 mi (7,594.33 km) |
| Clarkston to Oer-Erkenschwick | 4,489.68 mi (7,225.44 km) |
