| Williamstown to Rome (New York) | 245.93 mi (395.78 km) |
| Williamstown to Romeoville (Illinois) | 699.99 mi (1,126.53 km) |
| Williamstown to Romulus (Michigan) | 471.17 mi (758.28 km) |
| Williamstown to Ronkonkoma (New York) | 124.53 mi (200.41 km) |
| Williamstown to Roosevelt (New York) | 100.61 mi (161.91 km) |
| Williamstown to Rosamond (California) | 2,377.23 mi (3,825.79 km) |
| Williamstown to Rosaryville (Maryland) | 117.58 mi (189.22 km) |
| Williamstown to Roscoe (Illinois) | 754.06 mi (1,213.55 km) |
| Williamstown to Rose Hill (Virginia) | 129.84 mi (208.96 km) |
| Williamstown to Roseburg (Oregon) | 2,481.84 mi (3,994.14 km) |
| Williamstown to Rosedale (California) | 2,416.70 mi (3,889.30 km) |
| Williamstown to Rosedale (Maryland) | 85.28 mi (137.24 km) |
| Williamstown to Roselle (Illinois) | 702.53 mi (1,130.61 km) |
| Williamstown to Roselle (New Jersey) | 76.73 mi (123.49 km) |
| Williamstown to Roselle Park (New Jersey) | 77.32 mi (124.43 km) |
