| Herndon to Joliet (Illinois) | 593.85 mi (955.72 km) |
| Herndon to Jonesboro (Arkansas) | 760.57 mi (1,224.01 km) |
| Herndon to Joplin (Missouri) | 939.28 mi (1,511.63 km) |
| Herndon to Joppatowne (Maryland) | 63.49 mi (102.18 km) |
| Herndon to Juana Díaz (Puerto Rico) | 1,586.08 mi (2,552.54 km) |
| Herndon to Junction City (Kansas) | 1,043.16 mi (1,678.80 km) |
| Herndon to Juneau (Alaska) | 2,808.20 mi (4,519.37 km) |
| Herndon to Jupiter (Florida) | 847.32 mi (1,363.62 km) |
| Herndon to Jupiter Farms (Florida) | 848.33 mi (1,365.25 km) |
| Herndon to Jurupa Valley (California) | 2,234.85 mi (3,596.64 km) |
| Herndon to Justice (Illinois) | 582.16 mi (936.90 km) |
| Herndon to Kahului (Hawaii) | 4,753.03 mi (7,649.26 km) |
| Herndon to Kailua (Hawaii) | 4,799.87 mi (7,724.65 km) |
| Herndon to Kalamazoo (Michigan) | 486.66 mi (783.21 km) |
| Herndon to Kalispell (Montana) | 1,934.06 mi (3,112.57 km) |
