| Herndon to Kenosha (Wisconsin) | 602.51 mi (969.65 km) |
| Herndon to Kent (Ohio) | 258.49 mi (416.00 km) |
| Herndon to Kent (Washington) | 2,298.10 mi (3,698.43 km) |
| Herndon to Kentwood (Michigan) | 506.28 mi (814.77 km) |
| Herndon to Kerman (California) | 2,312.23 mi (3,721.17 km) |
| Herndon to Kernersville (North Carolina) | 246.92 mi (397.38 km) |
| Herndon to Kerrville (Texas) | 1,378.48 mi (2,218.45 km) |
| Herndon to Kettering (Maryland) | 32.62 mi (52.49 km) |
| Herndon to Kettering (Ohio) | 364.78 mi (587.06 km) |
| Herndon to Kewanee (Illinois) | 680.33 mi (1,094.88 km) |
| Herndon to Key Biscayne (Florida) | 931.59 mi (1,499.24 km) |
| Herndon to Key Largo (Florida) | 972.86 mi (1,565.67 km) |
| Herndon to Key West (Florida) | 1,027.84 mi (1,654.15 km) |
| Herndon to Keystone (Florida) | 806.41 mi (1,297.79 km) |
| Herndon to Kihei (Hawaii) | 4,756.46 mi (7,654.78 km) |
