| Clemson to Opwijk | 4,285.16 mi (6,896.30 km) |
| Clemson to Ostend | 4,227.55 mi (6,803.58 km) |
| Clemson to Oud-Heverlee | 4,308.14 mi (6,933.28 km) |
| Clemson to Oud-Turnhout | 4,308.40 mi (6,933.70 km) |
| Clemson to Oudenaarde | 4,264.45 mi (6,862.96 km) |
| Clemson to Oudenburg | 4,231.85 mi (6,810.51 km) |
| Clemson to Oupeye | 4,350.89 mi (7,002.08 km) |
| Clemson to Overijse | 4,304.03 mi (6,926.66 km) |
| Clemson to Overpelt | 4,328.36 mi (6,965.82 km) |
| Clemson to Paal | 4,323.21 mi (6,957.54 km) |
| Clemson to Peer | 4,332.04 mi (6,971.74 km) |
| Clemson to Pepinster | 4,361.69 mi (7,019.46 km) |
| Clemson to Peruwelz | 4,272.15 mi (6,875.36 km) |
| Clemson to Perwez | 4,319.58 mi (6,951.69 km) |
| Clemson to Philippeville | 4,319.84 mi (6,952.11 km) |
