| Mainz to Cologno al Serio | 311.19 mi (500.81 km) |
| Mainz to Cologno Monzese | 311.35 mi (501.07 km) |
| Mainz to Colorno | 362.62 mi (583.58 km) |
| Mainz to Comacchio | 408.37 mi (657.21 km) |
| Mainz to Comiso | 954.01 mi (1,535.32 km) |
| Mainz to Como | 290.81 mi (468.01 km) |
| Mainz to Concordia Sagittaria | 360.40 mi (580.01 km) |
| Mainz to Concorezzo | 307.59 mi (495.02 km) |
| Mainz to Conegliano | 338.89 mi (545.39 km) |
| Mainz to Conselice | 412.97 mi (664.61 km) |
| Mainz to Conselve | 368.45 mi (592.96 km) |
| Mainz to Conversano | 755.13 mi (1,215.26 km) |
| Mainz to Copertino | 822.01 mi (1,322.90 km) |
| Mainz to Copparo | 388.65 mi (625.47 km) |
| Mainz to Corato | 725.17 mi (1,167.05 km) |
