| Williamstown to Collegno | 4,041.41 mi (6,504.01 km) |
| Williamstown to Cologno al Serio | 4,117.75 mi (6,626.87 km) |
| Williamstown to Cologno Monzese | 4,101.34 mi (6,600.46 km) |
| Williamstown to Colorno | 4,168.04 mi (6,707.81 km) |
| Williamstown to Comacchio | 4,253.24 mi (6,844.93 km) |
| Williamstown to Comiso | 4,639.29 mi (7,466.21 km) |
| Williamstown to Como | 4,084.23 mi (6,572.93 km) |
| Williamstown to Concordia Sagittaria | 4,245.90 mi (6,833.12 km) |
| Williamstown to Concorezzo | 4,101.89 mi (6,601.36 km) |
| Williamstown to Conegliano | 4,218.58 mi (6,789.16 km) |
| Williamstown to Conselice | 4,244.33 mi (6,830.58 km) |
| Williamstown to Conselve | 4,221.90 mi (6,794.50 km) |
| Williamstown to Conversano | 4,600.38 mi (7,403.60 km) |
| Williamstown to Copertino | 4,667.87 mi (7,512.22 km) |
| Williamstown to Copparo | 4,231.54 mi (6,810.00 km) |
