| Williamstown to Pontedera | 4,220.65 mi (6,792.47 km) |
| Williamstown to Pontinia | 4,404.67 mi (7,088.64 km) |
| Williamstown to Porcari | 4,213.98 mi (6,781.75 km) |
| Williamstown to Porcia | 4,229.41 mi (6,806.58 km) |
| Williamstown to Pordenone | 4,231.37 mi (6,809.73 km) |
| Williamstown to Portici | 4,483.48 mi (7,215.46 km) |
| Williamstown to Porto Empedocle | 4,576.78 mi (7,365.62 km) |
| Williamstown to Porto Recanati | 4,360.54 mi (7,017.61 km) |
| Williamstown to Porto Sant'Elpidio | 4,370.03 mi (7,032.88 km) |
| Williamstown to Porto Tolle | 4,250.57 mi (6,840.63 km) |
| Williamstown to Porto Torres | 4,215.17 mi (6,783.66 km) |
| Williamstown to Portoferraio | 4,234.96 mi (6,815.51 km) |
| Williamstown to Portogruaro | 4,244.65 mi (6,831.10 km) |
| Williamstown to Portomaggiore | 4,236.77 mi (6,818.42 km) |
| Williamstown to Potenza | 4,554.99 mi (7,330.54 km) |
