| Rockville to Kennewick (Washington) | 2,164.71 mi (3,483.76 km) |
| Rockville to Kenosha (Wisconsin) | 609.95 mi (981.61 km) |
| Rockville to Kent (Ohio) | 264.06 mi (424.96 km) |
| Rockville to Kent (Washington) | 2,305.06 mi (3,709.64 km) |
| Rockville to Kentwood (Michigan) | 512.13 mi (824.20 km) |
| Rockville to Kerman (California) | 2,323.13 mi (3,738.72 km) |
| Rockville to Kernersville (North Carolina) | 260.76 mi (419.66 km) |
| Rockville to Kerrville (Texas) | 1,392.83 mi (2,241.55 km) |
| Rockville to Kettering (Maryland) | 23.83 mi (38.36 km) |
| Rockville to Kettering (Ohio) | 375.77 mi (604.74 km) |
| Rockville to Kewanee (Illinois) | 689.93 mi (1,110.33 km) |
| Rockville to Key Biscayne (Florida) | 941.69 mi (1,515.51 km) |
| Rockville to Key Largo (Florida) | 983.06 mi (1,582.09 km) |
| Rockville to Key West (Florida) | 1,038.82 mi (1,671.81 km) |
| Rockville to Keystone (Florida) | 818.58 mi (1,317.38 km) |
