| Herndon to Kinston (North Carolina) | 255.57 mi (411.30 km) |
| Herndon to Kirkland (Washington) | 2,297.08 mi (3,696.80 km) |
| Herndon to Kirksville (Missouri) | 812.21 mi (1,307.13 km) |
| Herndon to Kirkwood (Missouri) | 701.99 mi (1,129.75 km) |
| Herndon to Kiryas Joel (New York) | 236.09 mi (379.95 km) |
| Herndon to Kissimmee (Florida) | 772.30 mi (1,242.90 km) |
| Herndon to Klamath Falls (Oregon) | 2,313.30 mi (3,722.90 km) |
| Herndon to Knightdale (North Carolina) | 227.92 mi (366.81 km) |
| Herndon to Knik-Fairview (Alaska) | 3,333.75 mi (5,365.16 km) |
| Herndon to Knoxville (Tennessee) | 415.18 mi (668.17 km) |
| Herndon to Kokomo (Indiana) | 475.67 mi (765.52 km) |
| Herndon to Kuna (Idaho) | 2,031.89 mi (3,270.02 km) |
| Herndon to Kyle (Texas) | 1,317.66 mi (2,120.58 km) |
| Herndon to La Cañada Flintridge (California) | 2,268.87 mi (3,651.40 km) |
| Herndon to La Crescenta-Montrose (California) | 2,270.21 mi (3,653.55 km) |
