| Sierre to Carmona | 909.51 mi (1,463.72 km) |
| Sierre to Cartagena | 742.55 mi (1,195.02 km) |
| Sierre to Cartama | 911.76 mi (1,467.33 km) |
| Sierre to Cartaya | 977.16 mi (1,572.59 km) |
| Sierre to Caspe | 514.44 mi (827.91 km) |
| Sierre to Cassa de la Selva | 382.37 mi (615.37 km) |
| Sierre to Castalla | 676.15 mi (1,088.15 km) |
| Sierre to Castellbisbal | 432.74 mi (696.44 km) |
| Sierre to Castelldefels | 443.74 mi (714.12 km) |
| Sierre to Castello de Ampurias | 355.73 mi (572.49 km) |
| Sierre to Castellon de la Plana | 579.11 mi (931.99 km) |
| Sierre to Castilleja de la Cuesta | 929.53 mi (1,495.94 km) |
| Sierre to Catarroja | 622.85 mi (1,002.38 km) |
| Sierre to Catral | 705.08 mi (1,134.71 km) |
| Sierre to Caudete | 680.23 mi (1,094.72 km) |
