| Herndon to Paramus (New Jersey) | 222.38 mi (357.88 km) |
| Herndon to Paris (Kentucky) | 375.53 mi (604.36 km) |
| Herndon to Paris (Tennessee) | 625.01 mi (1,005.86 km) |
| Herndon to Paris (Texas) | 1,072.95 mi (1,726.74 km) |
| Herndon to Park Forest (Illinois) | 569.98 mi (917.29 km) |
| Herndon to Park Ridge (Illinois) | 587.82 mi (946.00 km) |
| Herndon to Parker (Colorado) | 1,460.47 mi (2,350.39 km) |
| Herndon to Parker (South Carolina) | 398.94 mi (642.03 km) |
| Herndon to Parkersburg (West Virginia) | 223.65 mi (359.93 km) |
| Herndon to Parkland (Florida) | 889.52 mi (1,431.54 km) |
| Herndon to Parkland (Washington) | 2,309.33 mi (3,716.51 km) |
| Herndon to Parkville (Maryland) | 53.05 mi (85.38 km) |
| Herndon to Parkway (California) | 2,351.47 mi (3,784.33 km) |
| Herndon to Parlier (California) | 2,287.10 mi (3,680.73 km) |
| Herndon to Parma (Ohio) | 283.43 mi (456.14 km) |
