| Herndon to Pittsburg (Kansas) | 944.79 mi (1,520.49 km) |
| Herndon to Pittsburgh (Pennsylvania) | 171.05 mi (275.27 km) |
| Herndon to Pittsfield (Massachusetts) | 323.29 mi (520.29 km) |
| Herndon to Placentia (California) | 2,258.41 mi (3,634.56 km) |
| Herndon to Placerville (California) | 2,313.26 mi (3,722.83 km) |
| Herndon to Plainfield (Illinois) | 599.34 mi (964.54 km) |
| Herndon to Plainfield (Indiana) | 482.58 mi (776.63 km) |
| Herndon to Plainfield (New Jersey) | 194.41 mi (312.88 km) |
| Herndon to Plainview (New York) | 242.36 mi (390.04 km) |
| Herndon to Plainview (Texas) | 1,385.52 mi (2,229.77 km) |
| Herndon to Plano (Illinois) | 615.48 mi (990.53 km) |
| Herndon to Plano (Texas) | 1,154.02 mi (1,857.21 km) |
| Herndon to Plant City (Florida) | 804.28 mi (1,294.37 km) |
| Herndon to Plantation (Florida) | 902.95 mi (1,453.15 km) |
| Herndon to Platteville (Wisconsin) | 730.38 mi (1,175.43 km) |
