| Mainz to Chitila | 910.05 mi (1,464.58 km) |
| Mainz to Cisnadie | 791.48 mi (1,273.77 km) |
| Mainz to Cluj-Napoca | 735.72 mi (1,184.02 km) |
| Mainz to Codlea | 847.52 mi (1,363.95 km) |
| Mainz to Comanesti | 870.05 mi (1,400.21 km) |
| Mainz to Comarnic | 869.96 mi (1,400.06 km) |
| Mainz to Constanta | 1,035.01 mi (1,665.68 km) |
| Mainz to Corabia | 876.05 mi (1,409.87 km) |
| Mainz to Costesti | 857.84 mi (1,380.55 km) |
| Mainz to Covasna | 874.99 mi (1,408.16 km) |
| Mainz to Craiova | 826.08 mi (1,329.45 km) |
| Mainz to Cristuru Secuiesc | 812.11 mi (1,306.96 km) |
| Mainz to Cugir | 753.69 mi (1,212.95 km) |
| Mainz to Cumpana | 1,033.55 mi (1,663.34 km) |
| Mainz to Curtea de Arges | 832.95 mi (1,340.50 km) |
