| San Marino to Cernavoda | 6,613.60 mi (10,643.56 km) |
| San Marino to Chitila | 6,555.12 mi (10,549.45 km) |
| San Marino to Cisnadie | 6,438.52 mi (10,361.80 km) |
| San Marino to Cluj-Napoca | 6,362.06 mi (10,238.75 km) |
| San Marino to Codlea | 6,470.68 mi (10,413.55 km) |
| San Marino to Comanesti | 6,449.93 mi (10,380.16 km) |
| San Marino to Comarnic | 6,502.06 mi (10,464.05 km) |
| San Marino to Constanta | 6,637.77 mi (10,682.45 km) |
| San Marino to Corabia | 6,562.84 mi (10,561.88 km) |
| San Marino to Costesti | 6,518.67 mi (10,490.78 km) |
| San Marino to Covasna | 6,478.95 mi (10,426.86 km) |
| San Marino to Craiova | 6,512.21 mi (10,480.39 km) |
| San Marino to Cristuru Secuiesc | 6,425.26 mi (10,340.46 km) |
| San Marino to Cugir | 6,411.34 mi (10,318.06 km) |
| San Marino to Cumpana | 6,639.32 mi (10,684.96 km) |
