| Clemson to Olivares | 4,161.94 mi (6,698.00 km) |
| Clemson to Olivenza | 4,080.84 mi (6,567.48 km) |
| Clemson to Olot | 4,449.89 mi (7,161.40 km) |
| Clemson to Onate | 4,197.45 mi (6,755.14 km) |
| Clemson to Onda | 4,382.87 mi (7,053.54 km) |
| Clemson to Onteniente | 4,398.79 mi (7,079.17 km) |
| Clemson to Orihuela | 4,403.37 mi (7,086.53 km) |
| Clemson to Osuna | 4,219.98 mi (6,791.40 km) |
| Clemson to Ourense | 3,955.06 mi (6,365.06 km) |
| Clemson to Oviedo | 4,027.93 mi (6,482.33 km) |
| Clemson to Paiporta | 4,390.63 mi (7,066.03 km) |
| Clemson to Pajara | 3,993.26 mi (6,426.53 km) |
| Clemson to Palafolls | 4,476.99 mi (7,205.01 km) |
| Clemson to Palafrugell | 4,488.96 mi (7,224.29 km) |
| Clemson to Palamos | 4,489.47 mi (7,225.10 km) |
