| Williamstown to Cividale del Friuli | 4,259.27 mi (6,854.63 km) |
| Williamstown to Civita Castellana | 4,345.34 mi (6,993.14 km) |
| Williamstown to Civitanova Marche | 4,368.14 mi (7,029.84 km) |
| Williamstown to Civitavecchia | 4,325.15 mi (6,960.66 km) |
| Williamstown to Civitella in Val di Chiana | 4,276.34 mi (6,882.11 km) |
| Williamstown to Clusone | 4,118.95 mi (6,628.81 km) |
| Williamstown to Coccaglio | 4,130.33 mi (6,647.13 km) |
| Williamstown to Codigoro | 4,245.91 mi (6,833.14 km) |
| Williamstown to Codogno | 4,131.44 mi (6,648.91 km) |
| Williamstown to Codroipo | 4,244.81 mi (6,831.36 km) |
| Williamstown to Cogoleto | 4,109.93 mi (6,614.29 km) |
| Williamstown to Colle di Val d'Elsa | 4,251.37 mi (6,841.91 km) |
| Williamstown to Colle Salvetti | 4,216.17 mi (6,785.27 km) |
| Williamstown to Collecchio | 4,166.78 mi (6,705.79 km) |
| Williamstown to Colleferro | 4,391.92 mi (7,068.11 km) |
