| Houston to Cocentaina | 5,207.80 mi (8,381.14 km) |
| Houston to Coin | 5,058.22 mi (8,140.42 km) |
| Houston to Colindres | 4,929.13 mi (7,932.67 km) |
| Houston to Collado-Villalba | 4,980.47 mi (8,015.29 km) |
| Houston to Colmenar Viejo | 4,991.33 mi (8,032.77 km) |
| Houston to Colmenarejo | 4,982.12 mi (8,017.94 km) |
| Houston to Conil de la Frontera | 5,002.47 mi (8,050.70 km) |
| Houston to Consuegra | 5,033.39 mi (8,100.47 km) |
| Houston to Corbera de Llobregat | 5,235.66 mi (8,425.99 km) |
| Houston to Cordoba | 5,021.45 mi (8,081.25 km) |
| Houston to Coria del Rio | 4,975.25 mi (8,006.89 km) |
| Houston to Crevillente | 5,205.37 mi (8,377.23 km) |
| Houston to Cuarte de Huerva | 5,098.68 mi (8,205.53 km) |
| Houston to Cubellas | 5,230.34 mi (8,417.42 km) |
| Houston to Cuellar | 4,944.33 mi (7,957.13 km) |
