| Herndon to Kaneohe (Hawaii) | 4,801.99 mi (7,728.05 km) |
| Herndon to Kankakee (Illinois) | 573.11 mi (922.33 km) |
| Herndon to Kannapolis (North Carolina) | 300.48 mi (483.57 km) |
| Herndon to Kansas City (Kansas) | 930.05 mi (1,496.77 km) |
| Herndon to Kansas City (Missouri) | 919.89 mi (1,480.42 km) |
| Herndon to Kapaa (Hawaii) | 4,856.77 mi (7,816.22 km) |
| Herndon to Kapolei (Hawaii) | 4,819.22 mi (7,755.78 km) |
| Herndon to Katy (Texas) | 1,224.82 mi (1,971.16 km) |
| Herndon to Kaukauna (Wisconsin) | 670.01 mi (1,078.28 km) |
| Herndon to Kaysville (Utah) | 1,822.74 mi (2,933.41 km) |
| Herndon to Kearney (Missouri) | 908.34 mi (1,461.83 km) |
| Herndon to Kearney (Nebraska) | 1,154.37 mi (1,857.77 km) |
| Herndon to Kearns (Utah) | 1,829.40 mi (2,944.13 km) |
| Herndon to Kearny (New Jersey) | 212.55 mi (342.06 km) |
| Herndon to Keene (New Hampshire) | 382.02 mi (614.80 km) |
