| South Portland to Pontedera | 3,870.14 mi (6,228.38 km) |
| South Portland to Pontinia | 4,056.30 mi (6,527.99 km) |
| South Portland to Porcari | 3,863.17 mi (6,217.17 km) |
| South Portland to Porcia | 3,873.95 mi (6,234.52 km) |
| South Portland to Pordenone | 3,875.91 mi (6,237.68 km) |
| South Portland to Portici | 4,135.06 mi (6,654.74 km) |
| South Portland to Porto Empedocle | 4,235.95 mi (6,817.11 km) |
| South Portland to Porto Recanati | 4,008.25 mi (6,450.66 km) |
| South Portland to Porto Sant'Elpidio | 4,017.95 mi (6,466.26 km) |
| South Portland to Porto Tolle | 3,896.79 mi (6,271.28 km) |
| South Portland to Porto Torres | 3,872.10 mi (6,231.54 km) |
| South Portland to Portoferraio | 3,886.23 mi (6,254.28 km) |
| South Portland to Portogruaro | 3,889.32 mi (6,259.26 km) |
| South Portland to Portomaggiore | 3,883.71 mi (6,250.23 km) |
| South Portland to Potenza | 4,205.65 mi (6,768.34 km) |
