| Gaithersburg to Kaneohe (Hawaii) | 4,808.85 mi (7,739.09 km) |
| Gaithersburg to Kankakee (Illinois) | 578.55 mi (931.08 km) |
| Gaithersburg to Kannapolis (North Carolina) | 315.18 mi (507.23 km) |
| Gaithersburg to Kansas City (Kansas) | 938.16 mi (1,509.83 km) |
| Gaithersburg to Kansas City (Missouri) | 928.01 mi (1,493.49 km) |
| Gaithersburg to Kapaa (Hawaii) | 4,863.29 mi (7,826.71 km) |
| Gaithersburg to Kapolei (Hawaii) | 4,826.06 mi (7,766.79 km) |
| Gaithersburg to Katy (Texas) | 1,238.14 mi (1,992.60 km) |
| Gaithersburg to Kaukauna (Wisconsin) | 670.84 mi (1,079.61 km) |
| Gaithersburg to Kaysville (Utah) | 1,828.68 mi (2,942.97 km) |
| Gaithersburg to Kearney (Missouri) | 916.26 mi (1,474.58 km) |
| Gaithersburg to Kearney (Nebraska) | 1,160.97 mi (1,868.41 km) |
| Gaithersburg to Kearns (Utah) | 1,835.53 mi (2,954.00 km) |
| Gaithersburg to Kearny (New Jersey) | 198.33 mi (319.18 km) |
| Gaithersburg to Keene (New Hampshire) | 367.33 mi (591.17 km) |
