| Herndon to Palmetto Bay (Florida) | 937.90 mi (1,509.40 km) |
| Herndon to Palmetto Estates (Florida) | 938.37 mi (1,510.17 km) |
| Herndon to Palmview (Texas) | 1,499.82 mi (2,413.73 km) |
| Herndon to Palo Alto (California) | 2,408.81 mi (3,876.60 km) |
| Herndon to Palos Heights (Illinois) | 578.65 mi (931.24 km) |
| Herndon to Palos Hills (Illinois) | 580.82 mi (934.74 km) |
| Herndon to Palos Verdes Estates (California) | 2,289.77 mi (3,685.03 km) |
| Herndon to Pampa (Texas) | 1,314.15 mi (2,114.92 km) |
| Herndon to Panama City (Florida) | 764.42 mi (1,230.22 km) |
| Herndon to Panama City Beach (Florida) | 772.02 mi (1,242.45 km) |
| Herndon to Papillion (Nebraska) | 997.26 mi (1,604.94 km) |
| Herndon to Paradise (Nevada) | 2,063.21 mi (3,320.42 km) |
| Herndon to Paradise Valley (Arizona) | 1,950.26 mi (3,138.64 km) |
| Herndon to Paragould (Arkansas) | 746.38 mi (1,201.18 km) |
| Herndon to Paramount (California) | 2,274.60 mi (3,660.61 km) |
