| Sierning to Cartagena | 1,055.34 mi (1,698.40 km) |
| Sierning to Cartama | 1,238.22 mi (1,992.72 km) |
| Sierning to Cartaya | 1,312.56 mi (2,112.36 km) |
| Sierning to Caspe | 845.67 mi (1,360.97 km) |
| Sierning to Cassa de la Selva | 701.20 mi (1,128.47 km) |
| Sierning to Castalla | 993.46 mi (1,598.82 km) |
| Sierning to Castellbisbal | 754.61 mi (1,214.43 km) |
| Sierning to Castelldefels | 763.83 mi (1,229.27 km) |
| Sierning to Castello de Ampurias | 676.79 mi (1,089.20 km) |
| Sierning to Castellon de la Plana | 902.07 mi (1,451.74 km) |
| Sierning to Castilleja de la Cuesta | 1,262.84 mi (2,032.35 km) |
| Sierning to Catarroja | 943.98 mi (1,519.18 km) |
| Sierning to Catral | 1,020.35 mi (1,642.09 km) |
| Sierning to Caudete | 1,000.15 mi (1,609.59 km) |
| Sierning to Cehegin | 1,061.08 mi (1,707.65 km) |
