| Middlesex to Cocentaina | 3,818.51 mi (6,145.30 km) |
| Middlesex to Coin | 3,674.51 mi (5,913.54 km) |
| Middlesex to Colindres | 3,540.23 mi (5,697.45 km) |
| Middlesex to Collado-Villalba | 3,590.87 mi (5,778.94 km) |
| Middlesex to Colmenar Viejo | 3,601.68 mi (5,796.34 km) |
| Middlesex to Colmenarejo | 3,592.55 mi (5,781.65 km) |
| Middlesex to Conil de la Frontera | 3,621.07 mi (5,827.55 km) |
| Middlesex to Consuegra | 3,644.49 mi (5,865.23 km) |
| Middlesex to Corbera de Llobregat | 3,846.66 mi (6,190.60 km) |
| Middlesex to Cordoba | 3,635.26 mi (5,850.38 km) |
| Middlesex to Coria del Rio | 3,591.26 mi (5,779.57 km) |
| Middlesex to Crevillente | 3,816.59 mi (6,142.21 km) |
| Middlesex to Cuarte de Huerva | 3,709.10 mi (5,969.23 km) |
| Middlesex to Cubellas | 3,841.11 mi (6,181.66 km) |
| Middlesex to Cuellar | 3,554.53 mi (5,720.47 km) |
