| Webster Groves to Kennewick (Washington) | 1,551.49 mi (2,496.87 km) |
| Webster Groves to Kenosha (Wisconsin) | 305.37 mi (491.44 km) |
| Webster Groves to Kent (Ohio) | 508.42 mi (818.23 km) |
| Webster Groves to Kent (Washington) | 1,706.67 mi (2,746.63 km) |
| Webster Groves to Kentwood (Michigan) | 387.62 mi (623.82 km) |
| Webster Groves to Kerman (California) | 1,623.06 mi (2,612.07 km) |
| Webster Groves to Kernersville (North Carolina) | 589.19 mi (948.21 km) |
| Webster Groves to Kerrville (Texas) | 773.55 mi (1,244.91 km) |
| Webster Groves to Kettering (Maryland) | 730.73 mi (1,175.99 km) |
| Webster Groves to Kettering (Ohio) | 341.15 mi (549.03 km) |
| Webster Groves to Kewanee (Illinois) | 184.72 mi (297.28 km) |
| Webster Groves to Key Biscayne (Florida) | 1,070.38 mi (1,722.61 km) |
| Webster Groves to Key Largo (Florida) | 1,096.48 mi (1,764.61 km) |
| Webster Groves to Key West (Florida) | 1,091.20 mi (1,756.12 km) |
| Webster Groves to Keystone (Florida) | 848.97 mi (1,366.29 km) |
