| Sumter to Castrovillari | 5,077.01 mi (8,170.66 km) |
| Sumter to Catania | 5,107.35 mi (8,219.49 km) |
| Sumter to Catanzaro | 5,127.91 mi (8,252.57 km) |
| Sumter to Cattolica | 4,781.55 mi (7,695.16 km) |
| Sumter to Cava de' Tirreni | 4,977.95 mi (8,011.24 km) |
| Sumter to Cavallino | 5,149.58 mi (8,287.46 km) |
| Sumter to Cavarzere | 4,716.03 mi (7,589.72 km) |
| Sumter to Cave | 4,860.27 mi (7,821.85 km) |
| Sumter to Cavriago | 4,661.67 mi (7,502.23 km) |
| Sumter to Cavriglia | 4,740.40 mi (7,628.93 km) |
| Sumter to Cazzago San Martino | 4,612.90 mi (7,423.74 km) |
| Sumter to Ceccano | 4,886.65 mi (7,864.31 km) |
| Sumter to Cecina | 4,703.34 mi (7,569.29 km) |
| Sumter to Cefalu | 5,038.13 mi (8,108.08 km) |
| Sumter to Ceglie Messapico | 5,106.19 mi (8,217.61 km) |
