| Seclin to Coin | 1,033.69 mi (1,663.57 km) |
| Seclin to Colindres | 580.38 mi (934.03 km) |
| Seclin to Collado-Villalba | 764.08 mi (1,229.67 km) |
| Seclin to Colmenar Viejo | 757.37 mi (1,218.87 km) |
| Seclin to Colmenarejo | 768.85 mi (1,237.34 km) |
| Seclin to Conil de la Frontera | 1,085.69 mi (1,747.24 km) |
| Seclin to Consuegra | 830.94 mi (1,337.27 km) |
| Seclin to Corbera de Llobregat | 633.10 mi (1,018.87 km) |
| Seclin to Cordoba | 955.34 mi (1,537.47 km) |
| Seclin to Coria del Rio | 1,020.08 mi (1,641.66 km) |
| Seclin to Crevillente | 870.38 mi (1,400.75 km) |
| Seclin to Cuarte de Huerva | 647.42 mi (1,041.92 km) |
| Seclin to Cubellas | 648.47 mi (1,043.61 km) |
| Seclin to Cuellar | 722.90 mi (1,163.39 km) |
| Seclin to Cuenca | 766.21 mi (1,233.10 km) |
