| Hertford to Cocentaina | 901.95 mi (1,451.55 km) |
| Hertford to Coin | 1,070.10 mi (1,722.15 km) |
| Hertford to Colindres | 601.08 mi (967.35 km) |
| Hertford to Collado-Villalba | 793.57 mi (1,277.13 km) |
| Hertford to Colmenar Viejo | 789.21 mi (1,270.11 km) |
| Hertford to Colmenarejo | 798.56 mi (1,285.16 km) |
| Hertford to Conil de la Frontera | 1,112.76 mi (1,790.82 km) |
| Hertford to Consuegra | 868.86 mi (1,398.30 km) |
| Hertford to Corbera de Llobregat | 723.40 mi (1,164.21 km) |
| Hertford to Cordoba | 987.92 mi (1,589.90 km) |
| Hertford to Coria del Rio | 1,044.13 mi (1,680.37 km) |
| Hertford to Crevillente | 936.74 mi (1,507.55 km) |
| Hertford to Cuarte de Huerva | 706.78 mi (1,137.45 km) |
| Hertford to Cubellas | 736.13 mi (1,184.69 km) |
| Hertford to Cuellar | 745.57 mi (1,199.87 km) |
