| Boucau to Carquefou | 260.71 mi (419.57 km) |
| Boucau to Carqueiranne | 381.12 mi (613.36 km) |
| Boucau to Carrieres-sous-Poissy | 410.79 mi (661.10 km) |
| Boucau to Carrieres-sur-Seine | 413.55 mi (665.54 km) |
| Boucau to Carros | 434.10 mi (698.62 km) |
| Boucau to Carvin | 524.87 mi (844.69 km) |
| Boucau to Castanet-Tolosan | 149.54 mi (240.66 km) |
| Boucau to Castelginest | 146.52 mi (235.80 km) |
| Boucau to Castelnau-le-Lez | 269.78 mi (434.16 km) |
| Boucau to Castelnaudary | 173.23 mi (278.79 km) |
| Boucau to Castelsarrasin | 134.20 mi (215.98 km) |
| Boucau to Castres | 187.14 mi (301.18 km) |
| Boucau to Caudebec-les-Elbeuf | 415.28 mi (668.33 km) |
| Boucau to Caudry | 511.26 mi (822.80 km) |
| Boucau to Cavaillon | 326.67 mi (525.72 km) |
