| Sumter to Cocentaina | 4,315.81 mi (6,945.63 km) |
| Sumter to Coin | 4,152.85 mi (6,683.37 km) |
| Sumter to Colindres | 4,054.67 mi (6,525.36 km) |
| Sumter to Collado-Villalba | 4,091.48 mi (6,584.61 km) |
| Sumter to Colmenar Viejo | 4,102.80 mi (6,602.82 km) |
| Sumter to Colmenarejo | 4,092.79 mi (6,586.71 km) |
| Sumter to Conil de la Frontera | 4,094.37 mi (6,589.25 km) |
| Sumter to Consuegra | 4,139.87 mi (6,662.48 km) |
| Sumter to Corbera de Llobregat | 4,359.76 mi (7,016.36 km) |
| Sumter to Cordoba | 4,120.25 mi (6,630.91 km) |
| Sumter to Coria del Rio | 4,070.46 mi (6,550.77 km) |
| Sumter to Crevillente | 4,310.82 mi (6,937.60 km) |
| Sumter to Cuarte de Huerva | 4,218.82 mi (6,789.54 km) |
| Sumter to Cubellas | 4,352.96 mi (7,005.41 km) |
| Sumter to Cuellar | 4,058.47 mi (6,531.47 km) |
