| Southborough to Pontedera | 708.14 mi (1,139.64 km) |
| Southborough to Pontinia | 906.44 mi (1,458.77 km) |
| Southborough to Porcari | 698.09 mi (1,123.47 km) |
| Southborough to Porcia | 667.81 mi (1,074.73 km) |
| Southborough to Pordenone | 669.78 mi (1,077.90 km) |
| Southborough to Portici | 980.09 mi (1,577.31 km) |
| Southborough to Porto Empedocle | 1,157.53 mi (1,862.86 km) |
| Southborough to Porto Recanati | 821.98 mi (1,322.85 km) |
| Southborough to Porto Sant'Elpidio | 833.13 mi (1,340.80 km) |
| Southborough to Porto Tolle | 701.29 mi (1,128.61 km) |
| Southborough to Porto Torres | 812.00 mi (1,306.79 km) |
| Southborough to Portoferraio | 744.75 mi (1,198.57 km) |
| Southborough to Portogruaro | 683.77 mi (1,100.41 km) |
| Southborough to Portomaggiore | 694.57 mi (1,117.80 km) |
| Southborough to Potenza | 1,038.57 mi (1,671.42 km) |
