| Crystal to Cocentaina | 4,525.28 mi (7,282.74 km) |
| Crystal to Coin | 4,431.16 mi (7,131.26 km) |
| Crystal to Colindres | 4,205.10 mi (6,767.46 km) |
| Crystal to Collado-Villalba | 4,295.53 mi (6,912.98 km) |
| Crystal to Colmenar Viejo | 4,304.62 mi (6,927.61 km) |
| Crystal to Colmenarejo | 4,298.18 mi (6,917.25 km) |
| Crystal to Conil de la Frontera | 4,389.93 mi (7,064.91 km) |
| Crystal to Consuegra | 4,361.47 mi (7,019.11 km) |
| Crystal to Corbera de Llobregat | 4,505.93 mi (7,251.59 km) |
| Crystal to Cordoba | 4,378.04 mi (7,045.78 km) |
| Crystal to Coria del Rio | 4,348.37 mi (6,998.03 km) |
| Crystal to Crevillente | 4,531.50 mi (7,292.74 km) |
| Crystal to Cuarte de Huerva | 4,383.48 mi (7,054.53 km) |
| Crystal to Cubellas | 4,504.58 mi (7,249.43 km) |
| Crystal to Cuellar | 4,251.05 mi (6,841.40 km) |
