| Clemson to Oerlinghausen | 4,436.22 mi (7,139.41 km) |
| Clemson to Oestrich-Winkel | 4,465.69 mi (7,186.83 km) |
| Clemson to Offenburg | 4,507.40 mi (7,253.96 km) |
| Clemson to Oftersheim | 4,507.66 mi (7,254.38 km) |
| Clemson to Ohrdruf | 4,550.18 mi (7,322.81 km) |
| Clemson to Ohringen | 4,549.97 mi (7,322.48 km) |
| Clemson to Olbernhau | 4,656.69 mi (7,494.21 km) |
| Clemson to Olching | 4,654.96 mi (7,491.44 km) |
| Clemson to Oldenburg | 4,386.16 mi (7,058.84 km) |
| Clemson to Oldenburg in Holstein | 4,453.57 mi (7,167.33 km) |
| Clemson to Olfen | 4,393.00 mi (7,069.86 km) |
| Clemson to Olpe | 4,430.18 mi (7,129.69 km) |
| Clemson to Olsberg | 4,446.48 mi (7,155.92 km) |
| Clemson to Oranienburg | 4,586.97 mi (7,382.02 km) |
| Clemson to Ortenberg | 4,497.79 mi (7,238.49 km) |
