| Rockville to Kalispell (Montana) | 1,940.59 mi (3,123.08 km) |
| Rockville to Kaneohe (Hawaii) | 4,812.59 mi (7,745.12 km) |
| Rockville to Kankakee (Illinois) | 582.55 mi (937.52 km) |
| Rockville to Kannapolis (North Carolina) | 314.31 mi (505.84 km) |
| Rockville to Kansas City (Kansas) | 941.59 mi (1,515.35 km) |
| Rockville to Kansas City (Missouri) | 931.44 mi (1,499.01 km) |
| Rockville to Kapaa (Hawaii) | 4,867.11 mi (7,832.86 km) |
| Rockville to Kapolei (Hawaii) | 4,829.80 mi (7,772.82 km) |
| Rockville to Katy (Texas) | 1,239.41 mi (1,994.64 km) |
| Rockville to Kaukauna (Wisconsin) | 675.41 mi (1,086.98 km) |
| Rockville to Kaysville (Utah) | 1,832.60 mi (2,949.29 km) |
| Rockville to Kearney (Missouri) | 919.74 mi (1,480.18 km) |
| Rockville to Kearney (Nebraska) | 1,164.76 mi (1,874.50 km) |
| Rockville to Kearns (Utah) | 1,839.42 mi (2,960.26 km) |
| Rockville to Kearny (New Jersey) | 197.90 mi (318.49 km) |
