| Herndon to Princeton (Florida) | 944.30 mi (1,519.71 km) |
| Herndon to Princeton (New Jersey) | 173.38 mi (279.03 km) |
| Herndon to Princeton (Texas) | 1,137.45 mi (1,830.55 km) |
| Herndon to Princeton Meadows (New Jersey) | 177.25 mi (285.26 km) |
| Herndon to Prineville (Oregon) | 2,248.14 mi (3,618.03 km) |
| Herndon to Prior Lake (Minnesota) | 914.88 mi (1,472.35 km) |
| Herndon to Progress (Pennsylvania) | 95.75 mi (154.10 km) |
| Herndon to Prospect Heights (Illinois) | 593.80 mi (955.62 km) |
| Herndon to Prosper (Texas) | 1,151.43 mi (1,853.04 km) |
| Herndon to Providence (Rhode Island) | 370.64 mi (596.49 km) |
| Herndon to Provo (Utah) | 1,814.42 mi (2,920.03 km) |
| Herndon to Prunedale (California) | 2,394.76 mi (3,853.99 km) |
| Herndon to Pueblo (Colorado) | 1,464.98 mi (2,357.66 km) |
| Herndon to Pueblo West (Colorado) | 1,470.07 mi (2,365.85 km) |
| Herndon to Pullman (Washington) | 2,061.34 mi (3,317.41 km) |
