| Williamstown to Cocentaina | 3,866.89 mi (6,223.16 km) |
| Williamstown to Coin | 3,719.47 mi (5,985.91 km) |
| Williamstown to Colindres | 3,591.71 mi (5,780.29 km) |
| Williamstown to Collado-Villalba | 3,639.75 mi (5,857.61 km) |
| Williamstown to Colmenar Viejo | 3,650.66 mi (5,875.17 km) |
| Williamstown to Colmenarejo | 3,641.36 mi (5,860.21 km) |
| Williamstown to Conil de la Frontera | 3,665.14 mi (5,898.47 km) |
| Williamstown to Consuegra | 3,692.44 mi (5,942.41 km) |
| Williamstown to Corbera de Llobregat | 3,897.99 mi (6,273.21 km) |
| Williamstown to Cordoba | 3,681.36 mi (5,924.58 km) |
| Williamstown to Coria del Rio | 3,636.33 mi (5,852.10 km) |
| Williamstown to Crevillente | 3,864.42 mi (6,219.18 km) |
| Williamstown to Cuarte de Huerva | 3,759.74 mi (6,050.71 km) |
| Williamstown to Cubellas | 3,892.19 mi (6,263.88 km) |
| Williamstown to Cuellar | 3,604.02 mi (5,800.10 km) |
