| Seclin to Cervello | 634.42 mi (1,020.99 km) |
| Seclin to Cervera | 619.43 mi (996.88 km) |
| Seclin to Ceuti | 887.02 mi (1,427.51 km) |
| Seclin to Cheste | 785.72 mi (1,264.49 km) |
| Seclin to Chiclana de la Frontera | 1,077.46 mi (1,734.01 km) |
| Seclin to Chipiona | 1,063.34 mi (1,711.28 km) |
| Seclin to Chiva | 786.68 mi (1,266.03 km) |
| Seclin to Churriana de la Vega | 982.74 mi (1,581.57 km) |
| Seclin to Ciempozuelos | 786.27 mi (1,265.38 km) |
| Seclin to Cieza | 877.96 mi (1,412.93 km) |
| Seclin to Cisterniga | 718.45 mi (1,156.24 km) |
| Seclin to Ciudad de Melilla | 1,096.36 mi (1,764.42 km) |
| Seclin to Ciudad Real | 867.74 mi (1,396.50 km) |
| Seclin to Ciudad-Rodrigo | 827.32 mi (1,331.44 km) |
| Seclin to Cocentaina | 832.93 mi (1,340.47 km) |
