| Herndon to Pottsville (Pennsylvania) | 133.65 mi (215.08 km) |
| Herndon to Poughkeepsie (New York) | 262.19 mi (421.96 km) |
| Herndon to Poulsbo (Washington) | 2,317.20 mi (3,729.17 km) |
| Herndon to Poway (California) | 2,236.22 mi (3,598.85 km) |
| Herndon to Powder Springs (Georgia) | 537.23 mi (864.59 km) |
| Herndon to Powell (Ohio) | 314.43 mi (506.02 km) |
| Herndon to Powell (Tennessee) | 416.59 mi (670.43 km) |
| Herndon to Prairie Ridge (Washington) | 2,295.39 mi (3,694.07 km) |
| Herndon to Prairie Village (Kansas) | 925.11 mi (1,488.82 km) |
| Herndon to Prairieville (Louisiana) | 974.16 mi (1,567.76 km) |
| Herndon to Prattville (Alabama) | 678.50 mi (1,091.94 km) |
| Herndon to Preakness (New Jersey) | 215.73 mi (347.18 km) |
| Herndon to Prescott (Arizona) | 1,951.59 mi (3,140.78 km) |
| Herndon to Prescott Valley (Arizona) | 1,944.38 mi (3,129.17 km) |
| Herndon to Prichard (Alabama) | 830.48 mi (1,336.52 km) |
