| Clemson to Cividale del Friuli | 4,811.33 mi (7,743.09 km) |
| Clemson to Civita Castellana | 4,897.19 mi (7,881.26 km) |
| Clemson to Civitanova Marche | 4,920.38 mi (7,918.59 km) |
| Clemson to Civitavecchia | 4,876.82 mi (7,848.48 km) |
| Clemson to Civitella in Val di Chiana | 4,828.45 mi (7,770.63 km) |
| Clemson to Clusone | 4,671.25 mi (7,517.65 km) |
| Clemson to Coccaglio | 4,682.64 mi (7,535.98 km) |
| Clemson to Codigoro | 4,798.22 mi (7,721.99 km) |
| Clemson to Codogno | 4,683.72 mi (7,537.71 km) |
| Clemson to Codroipo | 4,796.96 mi (7,719.95 km) |
| Clemson to Cogoleto | 4,661.98 mi (7,502.73 km) |
| Clemson to Colle di Val d'Elsa | 4,803.40 mi (7,730.33 km) |
| Clemson to Colle Salvetti | 4,768.19 mi (7,673.66 km) |
| Clemson to Collecchio | 4,719.03 mi (7,594.55 km) |
| Clemson to Colleferro | 4,943.65 mi (7,956.04 km) |
