| Boppard to Cartagena | 969.94 mi (1,560.97 km) |
| Boppard to Cartama | 1,114.01 mi (1,792.82 km) |
| Boppard to Cartaya | 1,153.87 mi (1,856.97 km) |
| Boppard to Caspe | 721.43 mi (1,161.03 km) |
| Boppard to Cassa de la Selva | 618.83 mi (995.92 km) |
| Boppard to Castalla | 900.06 mi (1,448.51 km) |
| Boppard to Castellbisbal | 661.90 mi (1,065.23 km) |
| Boppard to Castelldefels | 674.62 mi (1,085.70 km) |
| Boppard to Castello de Ampurias | 591.37 mi (951.72 km) |
| Boppard to Castellon de la Plana | 798.76 mi (1,285.48 km) |
| Boppard to Castilleja de la Cuesta | 1,114.59 mi (1,793.76 km) |
| Boppard to Catarroja | 843.44 mi (1,357.39 km) |
| Boppard to Catral | 930.63 mi (1,497.71 km) |
| Boppard to Caudete | 900.41 mi (1,449.06 km) |
| Boppard to Cehegin | 957.45 mi (1,540.86 km) |
