| Sumter to Cividale del Friuli | 4,743.93 mi (7,634.63 km) |
| Sumter to Civita Castellana | 4,820.96 mi (7,758.58 km) |
| Sumter to Civitanova Marche | 4,847.33 mi (7,801.02 km) |
| Sumter to Civitavecchia | 4,799.68 mi (7,724.34 km) |
| Sumter to Civitella in Val di Chiana | 4,753.96 mi (7,650.76 km) |
| Sumter to Clusone | 4,600.66 mi (7,404.05 km) |
| Sumter to Coccaglio | 4,611.37 mi (7,421.28 km) |
| Sumter to Codigoro | 4,727.05 mi (7,607.45 km) |
| Sumter to Codogno | 4,611.36 mi (7,421.27 km) |
| Sumter to Codroipo | 4,728.90 mi (7,610.42 km) |
| Sumter to Cogoleto | 4,587.15 mi (7,382.30 km) |
| Sumter to Colle di Val d'Elsa | 4,728.41 mi (7,609.64 km) |
| Sumter to Colle Salvetti | 4,693.10 mi (7,552.81 km) |
| Sumter to Collecchio | 4,646.18 mi (7,477.31 km) |
| Sumter to Colleferro | 4,866.79 mi (7,832.35 km) |
