| Williamstown to Carrollwood (Florida) | 911.58 mi (1,467.05 km) |
| Williamstown to Carson (California) | 2,405.76 mi (3,871.70 km) |
| Williamstown to Carson City (Nevada) | 2,364.51 mi (3,805.30 km) |
| Williamstown to Carteret (New Jersey) | 73.59 mi (118.43 km) |
| Williamstown to Cartersville (Georgia) | 662.63 mi (1,066.40 km) |
| Williamstown to Carthage (Missouri) | 1,059.58 mi (1,705.23 km) |
| Williamstown to Cary (Illinois) | 713.36 mi (1,148.03 km) |
| Williamstown to Cary (North Carolina) | 341.78 mi (550.03 km) |
| Williamstown to Casa de Oro-Mount Helix (California) | 2,366.60 mi (3,808.67 km) |
| Williamstown to Casa Grande (Arizona) | 2,085.84 mi (3,356.84 km) |
| Williamstown to Casas Adobes (Arizona) | 2,061.84 mi (3,318.21 km) |
| Williamstown to Cascades (Virginia) | 136.07 mi (218.99 km) |
| Williamstown to Casper (Wyoming) | 1,632.73 mi (2,627.63 km) |
| Williamstown to Casselberry (Florida) | 843.05 mi (1,356.75 km) |
| Williamstown to Castaic (California) | 2,408.93 mi (3,876.79 km) |
