| Rockville to Laredo (Texas) | 1,508.85 mi (2,428.26 km) |
| Rockville to Largo (Florida) | 836.68 mi (1,346.50 km) |
| Rockville to Largo (Maryland) | 22.47 mi (36.16 km) |
| Rockville to Larkspur (California) | 2,428.63 mi (3,908.51 km) |
| Rockville to Las Cruces (New Mexico) | 1,718.39 mi (2,765.48 km) |
| Rockville to Las Vegas (Nevada) | 2,078.61 mi (3,345.20 km) |
| Rockville to Las Vegas (New Mexico) | 1,553.99 mi (2,500.90 km) |
| Rockville to Latham (New York) | 309.04 mi (497.35 km) |
| Rockville to Lathrop (California) | 2,367.37 mi (3,809.92 km) |
| Rockville to Lauderdale Lakes (Florida) | 909.63 mi (1,463.90 km) |
| Rockville to Lauderhill (Florida) | 910.40 mi (1,465.15 km) |
| Rockville to Laurel (Florida) | 879.18 mi (1,414.90 km) |
| Rockville to Laurel (Maryland) | 15.74 mi (25.33 km) |
| Rockville to Laurel (Mississippi) | 845.28 mi (1,360.34 km) |
| Rockville to Laurel (Virginia) | 101.69 mi (163.66 km) |
