| Clay to Cehegin | 4,582.87 mi (7,375.42 km) |
| Clay to Cervello | 4,664.80 mi (7,507.27 km) |
| Clay to Cervera | 4,624.67 mi (7,442.69 km) |
| Clay to Ceuti | 4,609.16 mi (7,417.72 km) |
| Clay to Cheste | 4,596.35 mi (7,397.12 km) |
| Clay to Chiclana de la Frontera | 4,413.38 mi (7,102.66 km) |
| Clay to Chipiona | 4,390.17 mi (7,065.29 km) |
| Clay to Chiva | 4,594.90 mi (7,394.77 km) |
| Clay to Churriana de la Vega | 4,518.54 mi (7,271.88 km) |
| Clay to Ciempozuelos | 4,435.16 mi (7,137.69 km) |
| Clay to Cieza | 4,597.21 mi (7,398.49 km) |
| Clay to Cisterniga | 4,344.77 mi (6,992.23 km) |
| Clay to Ciudad de Melilla | 4,609.05 mi (7,417.54 km) |
| Clay to Ciudad Real | 4,453.20 mi (7,166.73 km) |
| Clay to Ciudad-Rodrigo | 4,281.63 mi (6,890.61 km) |
