| Williamstown to Pottstown (Pennsylvania) | 52.52 mi (84.53 km) |
| Williamstown to Pottsville (Pennsylvania) | 94.45 mi (152.00 km) |
| Williamstown to Poughkeepsie (New York) | 149.36 mi (240.38 km) |
| Williamstown to Poulsbo (Washington) | 2,404.27 mi (3,869.30 km) |
| Williamstown to Poway (California) | 2,363.13 mi (3,803.09 km) |
| Williamstown to Powder Springs (Georgia) | 670.35 mi (1,078.82 km) |
| Williamstown to Powell (Ohio) | 430.54 mi (692.88 km) |
| Williamstown to Powell (Tennessee) | 554.07 mi (891.69 km) |
| Williamstown to Prairie Ridge (Washington) | 2,384.51 mi (3,837.49 km) |
| Williamstown to Prairie Village (Kansas) | 1,049.49 mi (1,688.98 km) |
| Williamstown to Prairieville (Louisiana) | 1,109.46 mi (1,785.50 km) |
| Williamstown to Prattville (Alabama) | 811.43 mi (1,305.87 km) |
| Williamstown to Preakness (New Jersey) | 95.12 mi (153.08 km) |
| Williamstown to Prescott (Arizona) | 2,078.33 mi (3,344.74 km) |
| Williamstown to Prescott Valley (Arizona) | 2,071.16 mi (3,333.21 km) |
