| Rockville Centre to Cocentaina | 3,774.63 mi (6,074.67 km) |
| Rockville Centre to Coin | 3,629.81 mi (5,841.62 km) |
| Rockville Centre to Colindres | 3,497.36 mi (5,628.46 km) |
| Rockville Centre to Collado-Villalba | 3,547.13 mi (5,708.55 km) |
| Rockville Centre to Colmenar Viejo | 3,557.97 mi (5,726.00 km) |
| Rockville Centre to Colmenarejo | 3,548.79 mi (5,711.22 km) |
| Rockville Centre to Conil de la Frontera | 3,576.21 mi (5,755.35 km) |
| Rockville Centre to Consuegra | 3,600.48 mi (5,794.42 km) |
| Rockville Centre to Corbera de Llobregat | 3,803.74 mi (6,121.54 km) |
| Rockville Centre to Cordoba | 3,590.80 mi (5,778.83 km) |
| Rockville Centre to Coria del Rio | 3,546.58 mi (5,707.68 km) |
| Rockville Centre to Crevillente | 3,772.56 mi (6,071.34 km) |
| Rockville Centre to Cuarte de Huerva | 3,665.93 mi (5,899.75 km) |
| Rockville Centre to Cubellas | 3,798.10 mi (6,112.45 km) |
| Rockville Centre to Cuellar | 3,510.97 mi (5,650.37 km) |
