| Greenock to Cocentaina | 1,205.28 mi (1,939.71 km) |
| Greenock to Coin | 1,332.35 mi (2,144.21 km) |
| Greenock to Colindres | 869.30 mi (1,399.01 km) |
| Greenock to Collado-Villalba | 1,058.84 mi (1,704.03 km) |
| Greenock to Colmenar Viejo | 1,057.48 mi (1,701.85 km) |
| Greenock to Colmenarejo | 1,063.83 mi (1,712.07 km) |
| Greenock to Conil de la Frontera | 1,361.39 mi (2,190.94 km) |
| Greenock to Consuegra | 1,140.45 mi (1,835.38 km) |
| Greenock to Corbera de Llobregat | 1,048.38 mi (1,687.20 km) |
| Greenock to Cordoba | 1,248.21 mi (2,008.79 km) |
| Greenock to Coria del Rio | 1,291.13 mi (2,077.87 km) |
| Greenock to Crevillente | 1,236.62 mi (1,990.14 km) |
| Greenock to Cuarte de Huerva | 1,007.60 mi (1,621.57 km) |
| Greenock to Cubellas | 1,058.98 mi (1,704.27 km) |
| Greenock to Cuellar | 1,005.45 mi (1,618.12 km) |
