| Mainz to Cartagena | 970.31 mi (1,561.56 km) |
| Mainz to Cartama | 1,119.41 mi (1,801.51 km) |
| Mainz to Cartaya | 1,163.42 mi (1,872.34 km) |
| Mainz to Caspe | 724.57 mi (1,166.09 km) |
| Mainz to Cassa de la Selva | 615.95 mi (991.28 km) |
| Mainz to Castalla | 900.93 mi (1,449.90 km) |
| Mainz to Castellbisbal | 660.73 mi (1,063.35 km) |
| Mainz to Castelldefels | 673.19 mi (1,083.39 km) |
| Mainz to Castello de Ampurias | 588.47 mi (947.05 km) |
| Mainz to Castellon de la Plana | 800.07 mi (1,287.59 km) |
| Mainz to Castilleja de la Cuesta | 1,122.78 mi (1,806.93 km) |
| Mainz to Catarroja | 844.75 mi (1,359.50 km) |
| Mainz to Catral | 931.27 mi (1,498.73 km) |
| Mainz to Caudete | 901.99 mi (1,451.62 km) |
| Mainz to Cehegin | 959.80 mi (1,544.64 km) |
