| Sumter to Cortona | 4,770.55 mi (7,677.46 km) |
| Sumter to Cosenza | 5,097.58 mi (8,203.76 km) |
| Sumter to Cossato | 4,531.80 mi (7,293.22 km) |
| Sumter to Costa Volpino | 4,608.71 mi (7,417.00 km) |
| Sumter to Creazzo | 4,677.79 mi (7,528.17 km) |
| Sumter to Crema | 4,604.28 mi (7,409.88 km) |
| Sumter to Cremona | 4,626.59 mi (7,445.78 km) |
| Sumter to Crevalcore | 4,688.31 mi (7,545.11 km) |
| Sumter to Crispiano | 5,096.00 mi (8,201.22 km) |
| Sumter to Crosia | 5,111.73 mi (8,226.54 km) |
| Sumter to Crotone | 5,145.05 mi (8,280.16 km) |
| Sumter to Cuneo | 4,538.20 mi (7,303.53 km) |
| Sumter to Cuorgne | 4,514.00 mi (7,264.57 km) |
| Sumter to Cusano Milanino | 4,576.96 mi (7,365.91 km) |
| Sumter to Cutro | 5,140.72 mi (8,273.18 km) |
