| Rockville to Los Alamitos (California) | 2,283.28 mi (3,674.59 km) |
| Rockville to Los Alamos (New Mexico) | 1,605.25 mi (2,583.39 km) |
| Rockville to Los Altos (California) | 2,417.17 mi (3,890.05 km) |
| Rockville to Los Angeles (California) | 2,294.01 mi (3,691.86 km) |
| Rockville to Los Banos (California) | 2,357.28 mi (3,793.67 km) |
| Rockville to Los Gatos (California) | 2,412.59 mi (3,882.69 km) |
| Rockville to Los Lunas (New Mexico) | 1,654.67 mi (2,662.93 km) |
| Rockville to Los Osos (California) | 2,394.53 mi (3,853.62 km) |
| Rockville to Loudoun Valley Estates (Virginia) | 20.17 mi (32.46 km) |
| Rockville to Louisville (Colorado) | 1,486.75 mi (2,392.69 km) |
| Rockville to Louisville (Kentucky) | 462.64 mi (744.54 km) |
| Rockville to Lovejoy (Georgia) | 557.41 mi (897.07 km) |
| Rockville to Loveland (Colorado) | 1,479.17 mi (2,380.49 km) |
| Rockville to Loveland (Ohio) | 381.37 mi (613.75 km) |
| Rockville to Loves Park (Illinois) | 659.00 mi (1,060.56 km) |
