| South Portland to Poggibonsi | 3,899.31 mi (6,275.33 km) |
| South Portland to Poggio a Caiano | 3,883.39 mi (6,249.71 km) |
| South Portland to Poggio Renatico | 3,868.02 mi (6,224.98 km) |
| South Portland to Poggiomarino | 4,144.91 mi (6,670.59 km) |
| South Portland to Poirino | 3,707.43 mi (5,966.53 km) |
| South Portland to Policoro | 4,260.18 mi (6,856.10 km) |
| South Portland to Polistena | 4,305.38 mi (6,928.83 km) |
| South Portland to Pomezia | 4,022.96 mi (6,474.34 km) |
| South Portland to Pomigliano d'Arco | 4,133.92 mi (6,652.90 km) |
| South Portland to Pompei | 4,144.65 mi (6,670.17 km) |
| South Portland to Ponsacco | 3,871.76 mi (6,231.00 km) |
| South Portland to Pontassieve | 3,900.77 mi (6,277.68 km) |
| South Portland to Ponte Buggianese | 3,868.83 mi (6,226.28 km) |
| South Portland to Ponte San Pietro | 3,756.03 mi (6,044.75 km) |
| South Portland to Pontecorvo | 4,081.40 mi (6,568.37 km) |
