| Boom to Cartagena | 967.71 mi (1,557.38 km) |
| Boom to Cartama | 1,087.44 mi (1,750.07 km) |
| Boom to Cartaya | 1,108.23 mi (1,783.52 km) |
| Boom to Caspe | 712.07 mi (1,145.96 km) |
| Boom to Cassa de la Selva | 639.16 mi (1,028.63 km) |
| Boom to Castalla | 896.80 mi (1,443.26 km) |
| Boom to Castellbisbal | 673.35 mi (1,083.65 km) |
| Boom to Castelldefels | 686.82 mi (1,105.34 km) |
| Boom to Castello de Ampurias | 612.80 mi (986.20 km) |
| Boom to Castellon de la Plana | 795.59 mi (1,280.38 km) |
| Boom to Castilleja de la Cuesta | 1,075.50 mi (1,730.85 km) |
| Boom to Catarroja | 839.30 mi (1,350.72 km) |
| Boom to Catral | 927.88 mi (1,493.27 km) |
| Boom to Caudete | 893.95 mi (1,438.67 km) |
| Boom to Cehegin | 946.62 mi (1,523.44 km) |
