| Clemson to Benavente | 3,988.56 mi (6,418.97 km) |
| Clemson to Bombarral | 3,963.40 mi (6,378.48 km) |
| Clemson to Bougado | 3,944.14 mi (6,347.49 km) |
| Clemson to Braga | 3,946.03 mi (6,350.52 km) |
| Clemson to Braganca | 4,020.71 mi (6,470.72 km) |
| Clemson to Cabeceiras de Basto | 3,966.08 mi (6,382.79 km) |
| Clemson to Cacem | 3,967.80 mi (6,385.55 km) |
| Clemson to Cadaval | 3,967.02 mi (6,384.30 km) |
| Clemson to Caldas da Rainha | 3,961.03 mi (6,374.66 km) |
| Clemson to Calheta | 3,705.94 mi (5,964.14 km) |
| Clemson to Camara de Lobos | 3,716.87 mi (5,981.72 km) |
| Clemson to Canico | 3,725.15 mi (5,995.05 km) |
| Clemson to Cantanhede | 3,965.57 mi (6,381.97 km) |
| Clemson to Carregal do Sal | 3,992.84 mi (6,425.86 km) |
| Clemson to Cartaxo | 3,984.92 mi (6,413.10 km) |
