| Clemson to Oberkirch | 4,511.66 mi (7,260.82 km) |
| Clemson to Obernburg am Main | 4,516.40 mi (7,268.44 km) |
| Clemson to Obernkirchen | 4,445.21 mi (7,153.87 km) |
| Clemson to Oberschleissheim | 4,663.59 mi (7,505.32 km) |
| Clemson to Oberstdorf | 4,637.02 mi (7,462.56 km) |
| Clemson to Obertraubling | 4,665.08 mi (7,507.72 km) |
| Clemson to Obertshausen | 4,497.34 mi (7,237.77 km) |
| Clemson to Oberursel | 4,483.07 mi (7,214.80 km) |
| Clemson to Ochsenfurt | 4,559.32 mi (7,337.52 km) |
| Clemson to Ochsenhausen | 4,602.68 mi (7,407.30 km) |
| Clemson to Ochtrup | 4,372.16 mi (7,036.32 km) |
| Clemson to Odenthal | 4,401.21 mi (7,083.06 km) |
| Clemson to Oelde | 4,419.83 mi (7,113.02 km) |
| Clemson to Oelsnitz | 4,619.12 mi (7,433.75 km) |
| Clemson to Oer-Erkenschwick | 4,389.83 mi (7,064.74 km) |
