| Backnang to Cartagena | 940.92 mi (1,514.27 km) |
| Backnang to Cartama | 1,101.91 mi (1,773.35 km) |
| Backnang to Cartaya | 1,156.58 mi (1,861.33 km) |
| Backnang to Caspe | 703.98 mi (1,132.94 km) |
| Backnang to Cassa de la Selva | 581.62 mi (936.03 km) |
| Backnang to Castalla | 873.18 mi (1,405.25 km) |
| Backnang to Castellbisbal | 630.05 mi (1,013.97 km) |
| Backnang to Castelldefels | 641.71 mi (1,032.73 km) |
| Backnang to Castello de Ampurias | 554.48 mi (892.36 km) |
| Backnang to Castellon de la Plana | 774.17 mi (1,245.90 km) |
| Backnang to Castilleja de la Cuesta | 1,112.51 mi (1,790.40 km) |
| Backnang to Catarroja | 818.50 mi (1,317.26 km) |
| Backnang to Catral | 902.76 mi (1,452.85 km) |
| Backnang to Caudete | 876.03 mi (1,409.84 km) |
| Backnang to Cehegin | 935.39 mi (1,505.36 km) |
