| Mainz to Coin | 1,125.46 mi (1,811.26 km) |
| Mainz to Colindres | 716.47 mi (1,153.04 km) |
| Mainz to Collado-Villalba | 877.06 mi (1,411.48 km) |
| Mainz to Colmenar Viejo | 867.79 mi (1,396.58 km) |
| Mainz to Colmenarejo | 881.26 mi (1,418.25 km) |
| Mainz to Conil de la Frontera | 1,188.05 mi (1,911.98 km) |
| Mainz to Consuegra | 929.43 mi (1,495.77 km) |
| Mainz to Corbera de Llobregat | 665.59 mi (1,071.17 km) |
| Mainz to Cordoba | 1,055.17 mi (1,698.12 km) |
| Mainz to Coria del Rio | 1,128.47 mi (1,816.09 km) |
| Mainz to Crevillente | 925.81 mi (1,489.95 km) |
| Mainz to Cuarte de Huerva | 728.67 mi (1,172.69 km) |
| Mainz to Cubellas | 684.23 mi (1,101.16 km) |
| Mainz to Cuellar | 846.55 mi (1,362.40 km) |
| Mainz to Cuenca | 851.64 mi (1,370.58 km) |
