| Howard to Cocentaina | 4,317.31 mi (6,948.05 km) |
| Howard to Coin | 4,212.38 mi (6,779.16 km) |
| Howard to Colindres | 4,004.84 mi (6,445.16 km) |
| Howard to Collado-Villalba | 4,087.15 mi (6,577.64 km) |
| Howard to Colmenar Viejo | 4,096.64 mi (6,592.91 km) |
| Howard to Colmenarejo | 4,089.61 mi (6,581.59 km) |
| Howard to Conil de la Frontera | 4,168.51 mi (6,708.56 km) |
| Howard to Consuegra | 4,150.74 mi (6,679.97 km) |
| Howard to Corbera de Llobregat | 4,308.15 mi (6,933.30 km) |
| Howard to Cordoba | 4,161.96 mi (6,698.03 km) |
| Howard to Coria del Rio | 4,129.23 mi (6,645.36 km) |
| Howard to Crevillente | 4,321.81 mi (6,955.29 km) |
| Howard to Cuarte de Huerva | 4,181.93 mi (6,730.16 km) |
| Howard to Cubellas | 4,305.89 mi (6,929.65 km) |
| Howard to Cuellar | 4,044.23 mi (6,508.55 km) |
