| Key Largo to Cocentaina | 4,638.07 mi (7,464.25 km) |
| Key Largo to Coin | 4,443.95 mi (7,151.85 km) |
| Key Largo to Colindres | 4,414.42 mi (7,104.33 km) |
| Key Largo to Collado-Villalba | 4,423.61 mi (7,119.11 km) |
| Key Largo to Colmenar Viejo | 4,435.69 mi (7,138.55 km) |
| Key Largo to Colmenarejo | 4,424.19 mi (7,120.05 km) |
| Key Largo to Conil de la Frontera | 4,377.99 mi (7,045.70 km) |
| Key Largo to Consuegra | 4,461.45 mi (7,180.02 km) |
| Key Largo to Corbera de Llobregat | 4,712.37 mi (7,583.82 km) |
| Key Largo to Cordoba | 4,423.49 mi (7,118.92 km) |
| Key Largo to Coria del Rio | 4,364.55 mi (7,024.06 km) |
| Key Largo to Crevillente | 4,627.45 mi (7,447.17 km) |
| Key Largo to Cuarte de Huerva | 4,566.60 mi (7,349.23 km) |
| Key Largo to Cubellas | 4,703.10 mi (7,568.91 km) |
| Key Largo to Cuellar | 4,397.43 mi (7,076.98 km) |
