| Rockville to Ashtabula (Ohio) | 271.99 mi (437.72 km) |
| Rockville to Ashwaubenon (Wisconsin) | 674.63 mi (1,085.70 km) |
| Rockville to Aspen Hill (Maryland) | 3.95 mi (6.36 km) |
| Rockville to Astoria (Oregon) | 2,385.81 mi (3,839.60 km) |
| Rockville to Atascadero (California) | 2,383.13 mi (3,835.28 km) |
| Rockville to Atascocita (Texas) | 1,200.85 mi (1,932.58 km) |
| Rockville to Atchison (Kansas) | 960.07 mi (1,545.08 km) |
| Rockville to Athens (Alabama) | 616.64 mi (992.38 km) |
| Rockville to Athens (Georgia) | 494.53 mi (795.87 km) |
| Rockville to Athens (Ohio) | 265.17 mi (426.75 km) |
| Rockville to Athens (Tennessee) | 479.88 mi (772.30 km) |
| Rockville to Athens (Texas) | 1,148.47 mi (1,848.28 km) |
| Rockville to Atlanta (Georgia) | 545.87 mi (878.49 km) |
| Rockville to Atlantic Beach (Florida) | 650.65 mi (1,047.12 km) |
| Rockville to Atlantic City (New Jersey) | 146.08 mi (235.09 km) |
