| Webster Groves to Kingsville (Texas) | 879.41 mi (1,415.27 km) |
| Webster Groves to Kinston (North Carolina) | 740.24 mi (1,191.29 km) |
| Webster Groves to Kirkland (Washington) | 1,709.85 mi (2,751.74 km) |
| Webster Groves to Kirksville (Missouri) | 162.68 mi (261.80 km) |
| Webster Groves to Kirkwood (Missouri) | 3.60 mi (5.79 km) |
| Webster Groves to Kiryas Joel (New York) | 876.71 mi (1,410.93 km) |
| Webster Groves to Kissimmee (Florida) | 876.60 mi (1,410.75 km) |
| Webster Groves to Klamath Falls (Oregon) | 1,662.54 mi (2,675.60 km) |
| Webster Groves to Knightdale (North Carolina) | 680.09 mi (1,094.50 km) |
| Webster Groves to Knik-Fairview (Alaska) | 2,928.16 mi (4,712.42 km) |
| Webster Groves to Knoxville (Tennessee) | 395.71 mi (636.84 km) |
| Webster Groves to Kokomo (Indiana) | 259.89 mi (418.26 km) |
| Webster Groves to Kuna (Idaho) | 1,392.40 mi (2,240.85 km) |
| Webster Groves to Kyle (Texas) | 732.41 mi (1,178.70 km) |
| Webster Groves to La Cañada Flintridge (California) | 1,571.55 mi (2,529.17 km) |
