| Webster Groves to Kalispell (Montana) | 1,366.86 mi (2,199.75 km) |
| Webster Groves to Kaneohe (Hawaii) | 4,114.07 mi (6,620.95 km) |
| Webster Groves to Kankakee (Illinois) | 218.28 mi (351.29 km) |
| Webster Groves to Kannapolis (North Carolina) | 576.89 mi (928.41 km) |
| Webster Groves to Kansas City (Kansas) | 239.07 mi (384.75 km) |
| Webster Groves to Kansas City (Missouri) | 228.97 mi (368.50 km) |
| Webster Groves to Kapaa (Hawaii) | 4,172.31 mi (6,714.68 km) |
| Webster Groves to Kapolei (Hawaii) | 4,131.51 mi (6,649.02 km) |
| Webster Groves to Katy (Texas) | 683.38 mi (1,099.79 km) |
| Webster Groves to Kaukauna (Wisconsin) | 407.79 mi (656.27 km) |
| Webster Groves to Kaysville (Utah) | 1,155.32 mi (1,859.31 km) |
| Webster Groves to Kearney (Missouri) | 221.60 mi (356.63 km) |
| Webster Groves to Kearney (Nebraska) | 486.60 mi (783.10 km) |
| Webster Groves to Kearns (Utah) | 1,158.36 mi (1,864.20 km) |
| Webster Groves to Kearny (New Jersey) | 874.95 mi (1,408.10 km) |
