| Clemson to Sesimbra | 3,986.34 mi (6,415.39 km) |
| Clemson to Setubal | 3,994.80 mi (6,429.01 km) |
| Clemson to Sever do Vouga | 3,967.64 mi (6,385.31 km) |
| Clemson to Silves | 4,051.68 mi (6,520.55 km) |
| Clemson to Sines | 4,010.44 mi (6,454.18 km) |
| Clemson to Sintra | 3,963.05 mi (6,377.92 km) |
| Clemson to Sobrado de Paiva | 3,965.51 mi (6,381.88 km) |
| Clemson to Sobral de Monte Agraco | 3,969.63 mi (6,388.49 km) |
| Clemson to Soure | 3,970.67 mi (6,390.18 km) |
| Clemson to Tabua | 3,993.15 mi (6,426.35 km) |
| Clemson to Tavira | 4,093.74 mi (6,588.25 km) |
| Clemson to Tomar | 3,992.28 mi (6,424.96 km) |
| Clemson to Tondela | 3,986.74 mi (6,416.04 km) |
| Clemson to Torre de Moncorvo | 4,016.99 mi (6,464.73 km) |
| Clemson to Torres Novas | 3,989.71 mi (6,420.81 km) |
