| Rockville to Arcata (California) | 2,457.49 mi (3,954.95 km) |
| Rockville to Archdale (North Carolina) | 268.12 mi (431.50 km) |
| Rockville to Arden-Arcade (California) | 2,356.37 mi (3,792.20 km) |
| Rockville to Ardmore (Oklahoma) | 1,154.77 mi (1,858.42 km) |
| Rockville to Ardmore (Pennsylvania) | 117.76 mi (189.51 km) |
| Rockville to Arecibo (Puerto Rico) | 1,556.32 mi (2,504.65 km) |
| Rockville to Arkadelphia (Arkansas) | 945.39 mi (1,521.46 km) |
| Rockville to Arkansas City (Kansas) | 1,088.08 mi (1,751.10 km) |
| Rockville to Arlington (Tennessee) | 737.03 mi (1,186.14 km) |
| Rockville to Arlington (Texas) | 1,198.45 mi (1,928.72 km) |
| Rockville to Arlington (Virginia) | 14.45 mi (23.25 km) |
| Rockville to Arlington (Washington) | 2,300.17 mi (3,701.77 km) |
| Rockville to Arlington Heights (Illinois) | 604.48 mi (972.82 km) |
| Rockville to Arnold (Maryland) | 35.40 mi (56.97 km) |
| Rockville to Arnold (Missouri) | 712.98 mi (1,147.44 km) |
