| Alliance to Cocentaina | 4,121.17 mi (6,632.38 km) |
| Alliance to Coin | 3,988.67 mi (6,419.14 km) |
| Alliance to Colindres | 3,830.92 mi (6,165.26 km) |
| Alliance to Collado-Villalba | 3,892.05 mi (6,263.65 km) |
| Alliance to Colmenar Viejo | 3,902.47 mi (6,280.42 km) |
| Alliance to Colmenarejo | 3,893.98 mi (6,266.76 km) |
| Alliance to Conil de la Frontera | 3,937.88 mi (6,337.41 km) |
| Alliance to Consuegra | 3,948.97 mi (6,355.26 km) |
| Alliance to Corbera de Llobregat | 4,137.37 mi (6,658.45 km) |
| Alliance to Cordoba | 3,945.99 mi (6,350.47 km) |
| Alliance to Coria del Rio | 3,905.24 mi (6,284.88 km) |
| Alliance to Crevillente | 4,121.25 mi (6,632.51 km) |
| Alliance to Cuarte de Huerva | 4,003.09 mi (6,442.35 km) |
| Alliance to Cubellas | 4,132.88 mi (6,651.22 km) |
| Alliance to Cuellar | 3,853.49 mi (6,201.59 km) |
