| Grande-Synthe to Carpentras | 497.44 mi (800.55 km) |
| Grande-Synthe to Carquefou | 308.73 mi (496.86 km) |
| Grande-Synthe to Carqueiranne | 575.02 mi (925.40 km) |
| Grande-Synthe to Carrieres-sous-Poissy | 143.24 mi (230.51 km) |
| Grande-Synthe to Carrieres-sur-Seine | 145.31 mi (233.86 km) |
| Grande-Synthe to Carros | 549.84 mi (884.88 km) |
| Grande-Synthe to Carvin | 45.99 mi (74.02 km) |
| Grande-Synthe to Castanet-Tolosan | 519.45 mi (835.97 km) |
| Grande-Synthe to Castelginest | 507.41 mi (816.60 km) |
| Grande-Synthe to Castelnau-le-Lez | 515.14 mi (829.04 km) |
| Grande-Synthe to Castelnaudary | 531.98 mi (856.14 km) |
| Grande-Synthe to Castelsarrasin | 485.05 mi (780.61 km) |
| Grande-Synthe to Castres | 512.26 mi (824.40 km) |
| Grande-Synthe to Caudebec-les-Elbeuf | 132.51 mi (213.25 km) |
| Grande-Synthe to Caudry | 78.36 mi (126.10 km) |
