| Rockville to Lancaster (Texas) | 1,183.77 mi (1,905.09 km) |
| Rockville to Land O' Lakes (Florida) | 810.35 mi (1,304.14 km) |
| Rockville to Landover (Maryland) | 18.11 mi (29.14 km) |
| Rockville to Langley Park (Maryland) | 11.38 mi (18.32 km) |
| Rockville to Lanham (Maryland) | 18.79 mi (30.24 km) |
| Rockville to Lansdale (Pennsylvania) | 127.83 mi (205.72 km) |
| Rockville to Lansdowne (Pennsylvania) | 116.38 mi (187.29 km) |
| Rockville to Lansdowne (Virginia) | 17.62 mi (28.36 km) |
| Rockville to Lansing (Illinois) | 573.15 mi (922.40 km) |
| Rockville to Lansing (Kansas) | 949.00 mi (1,527.27 km) |
| Rockville to Lansing (Michigan) | 460.69 mi (741.40 km) |
| Rockville to Lantana (Florida) | 879.79 mi (1,415.89 km) |
| Rockville to Lantana (Texas) | 1,186.09 mi (1,908.82 km) |
| Rockville to Laplace (Louisiana) | 978.82 mi (1,575.26 km) |
| Rockville to Laramie (Wyoming) | 1,502.72 mi (2,418.40 km) |
