| Boone to Cocentaina | 4,300.59 mi (6,921.13 km) |
| Boone to Coin | 4,148.89 mi (6,677.00 km) |
| Boone to Colindres | 4,027.62 mi (6,481.83 km) |
| Boone to Collado-Villalba | 4,073.97 mi (6,556.43 km) |
| Boone to Colmenar Viejo | 4,084.97 mi (6,574.12 km) |
| Boone to Colmenarejo | 4,075.52 mi (6,558.92 km) |
| Boone to Conil de la Frontera | 4,093.17 mi (6,587.32 km) |
| Boone to Consuegra | 4,125.74 mi (6,639.74 km) |
| Boone to Corbera de Llobregat | 4,333.83 mi (6,974.62 km) |
| Boone to Cordoba | 4,112.42 mi (6,618.30 km) |
| Boone to Coria del Rio | 4,065.93 mi (6,543.49 km) |
| Boone to Crevillente | 4,297.54 mi (6,916.23 km) |
| Boone to Cuarte de Huerva | 4,195.24 mi (6,751.58 km) |
| Boone to Cubellas | 4,327.92 mi (6,965.12 km) |
| Boone to Cuellar | 4,038.75 mi (6,499.74 km) |
