| Seclin to Cartagena | 916.18 mi (1,474.44 km) |
| Seclin to Cartama | 1,028.58 mi (1,655.35 km) |
| Seclin to Cartaya | 1,045.00 mi (1,681.77 km) |
| Seclin to Caspe | 660.09 mi (1,062.31 km) |
| Seclin to Cassa de la Selva | 598.32 mi (962.91 km) |
| Seclin to Castalla | 845.34 mi (1,360.44 km) |
| Seclin to Castellbisbal | 628.78 mi (1,011.92 km) |
| Seclin to Castelldefels | 642.36 mi (1,033.77 km) |
| Seclin to Castello de Ampurias | 572.79 mi (921.82 km) |
| Seclin to Castellon de la Plana | 744.85 mi (1,198.72 km) |
| Seclin to Castilleja de la Cuesta | 1,013.73 mi (1,631.44 km) |
| Seclin to Catarroja | 787.93 mi (1,268.05 km) |
| Seclin to Catral | 876.39 mi (1,410.41 km) |
| Seclin to Caudete | 841.51 mi (1,354.28 km) |
| Seclin to Cehegin | 892.60 mi (1,436.50 km) |
