| Herndon to Pontedera | 4,354.42 mi (7,007.76 km) |
| Herndon to Pontinia | 4,539.11 mi (7,304.99 km) |
| Herndon to Porcari | 4,347.65 mi (6,996.87 km) |
| Herndon to Porcia | 4,361.20 mi (7,018.68 km) |
| Herndon to Pordenone | 4,363.16 mi (7,021.83 km) |
| Herndon to Portici | 4,617.91 mi (7,431.80 km) |
| Herndon to Porto Empedocle | 4,712.88 mi (7,584.65 km) |
| Herndon to Porto Recanati | 4,493.70 mi (7,231.91 km) |
| Herndon to Porto Sant'Elpidio | 4,503.27 mi (7,247.31 km) |
| Herndon to Porto Tolle | 4,383.13 mi (7,053.97 km) |
| Herndon to Porto Torres | 4,350.83 mi (7,001.98 km) |
| Herndon to Portoferraio | 4,369.27 mi (7,031.66 km) |
| Herndon to Portogruaro | 4,376.51 mi (7,043.31 km) |
| Herndon to Portomaggiore | 4,369.62 mi (7,032.23 km) |
| Herndon to Potenza | 4,689.15 mi (7,546.46 km) |
