| Holt to Cocentaina | 4,222.73 mi (6,795.82 km) |
| Holt to Coin | 4,103.39 mi (6,603.77 km) |
| Holt to Colindres | 3,921.17 mi (6,310.52 km) |
| Holt to Collado-Villalba | 3,992.73 mi (6,425.68 km) |
| Holt to Colmenar Viejo | 4,002.72 mi (6,441.75 km) |
| Holt to Colmenarejo | 3,994.92 mi (6,429.20 km) |
| Holt to Conil de la Frontera | 4,055.89 mi (6,527.32 km) |
| Holt to Consuegra | 4,052.99 mi (6,522.65 km) |
| Holt to Corbera de Llobregat | 4,226.63 mi (6,802.11 km) |
| Holt to Cordoba | 4,056.90 mi (6,528.95 km) |
| Holt to Coria del Rio | 4,019.98 mi (6,469.53 km) |
| Holt to Crevillente | 4,224.95 mi (6,799.40 km) |
| Holt to Cuarte de Huerva | 4,096.04 mi (6,591.94 km) |
| Holt to Cubellas | 4,223.22 mi (6,796.61 km) |
| Holt to Cuellar | 3,951.98 mi (6,360.09 km) |
