| Williamstown to Petaluma (California) | 2,531.21 mi (4,073.58 km) |
| Williamstown to Petersburg (Virginia) | 215.57 mi (346.93 km) |
| Williamstown to Pflugerville (Texas) | 1,424.09 mi (2,291.85 km) |
| Williamstown to Pharr (Texas) | 1,630.37 mi (2,623.82 km) |
| Williamstown to Phelan (California) | 2,351.39 mi (3,784.19 km) |
| Williamstown to Phenix City (Alabama) | 750.27 mi (1,207.44 km) |
| Williamstown to Philadelphia (Pennsylvania) | 23.61 mi (38.00 km) |
| Williamstown to Phillipsburg (New Jersey) | 70.06 mi (112.75 km) |
| Williamstown to Phoenix (Arizona) | 2,085.20 mi (3,355.81 km) |
| Williamstown to Phoenixville (Pennsylvania) | 42.24 mi (67.97 km) |
| Williamstown to Picayune (Mississippi) | 1,041.63 mi (1,676.34 km) |
| Williamstown to Pickerington (Ohio) | 413.65 mi (665.71 km) |
| Williamstown to Pico Rivera (California) | 2,392.89 mi (3,850.98 km) |
| Williamstown to Piedmont (California) | 2,519.55 mi (4,054.82 km) |
| Williamstown to Pierre (South Dakota) | 1,334.43 mi (2,147.55 km) |
