| Mercer Island to Cocentaina | 5,483.11 mi (8,824.22 km) |
| Mercer Island to Coin | 5,457.69 mi (8,783.30 km) |
| Mercer Island to Colindres | 5,131.95 mi (8,259.08 km) |
| Mercer Island to Collado-Villalba | 5,265.15 mi (8,473.44 km) |
| Mercer Island to Colmenar Viejo | 5,271.52 mi (8,483.69 km) |
| Mercer Island to Colmenarejo | 5,268.83 mi (8,479.37 km) |
| Mercer Island to Conil de la Frontera | 5,434.03 mi (8,745.23 km) |
| Mercer Island to Consuegra | 5,342.26 mi (8,597.54 km) |
| Mercer Island to Corbera de Llobregat | 5,404.69 mi (8,698.00 km) |
| Mercer Island to Cordoba | 5,390.08 mi (8,674.50 km) |
| Mercer Island to Coria del Rio | 5,379.98 mi (8,658.24 km) |
| Mercer Island to Crevillente | 5,499.30 mi (8,850.27 km) |
| Mercer Island to Cuarte de Huerva | 5,309.67 mi (8,545.09 km) |
| Mercer Island to Cubellas | 5,408.78 mi (8,704.59 km) |
| Mercer Island to Cuellar | 5,213.52 mi (8,390.34 km) |
