| Clay to Cadiz | 4,402.58 mi (7,085.27 km) |
| Clay to Calafell | 4,652.47 mi (7,487.42 km) |
| Clay to Calahorra | 4,455.12 mi (7,169.83 km) |
| Clay to Calasparra | 4,583.67 mi (7,376.70 km) |
| Clay to Calatayud | 4,497.20 mi (7,237.54 km) |
| Clay to Caldas de Montbuy | 4,667.39 mi (7,511.44 km) |
| Clay to Caldas de Reyes | 4,131.11 mi (6,648.38 km) |
| Clay to Calella | 4,690.94 mi (7,549.33 km) |
| Clay to Callosa de Segura | 4,627.11 mi (7,446.62 km) |
| Clay to Calpe | 4,656.49 mi (7,493.90 km) |
| Clay to Calvia | 4,746.59 mi (7,638.89 km) |
| Clay to Camas | 4,391.86 mi (7,068.02 km) |
| Clay to Cambados | 4,125.75 mi (6,639.76 km) |
| Clay to Cambre | 4,129.92 mi (6,646.46 km) |
| Clay to Cambrils | 4,632.37 mi (7,455.08 km) |
