| Potomac to Arcata (California) | 2,457.01 mi (3,954.17 km) |
| Potomac to Archdale (North Carolina) | 263.02 mi (423.28 km) |
| Potomac to Arden-Arcade (California) | 2,355.46 mi (3,790.74 km) |
| Potomac to Ardmore (Oklahoma) | 1,151.82 mi (1,853.68 km) |
| Potomac to Ardmore (Pennsylvania) | 122.17 mi (196.61 km) |
| Potomac to Arecibo (Puerto Rico) | 1,552.98 mi (2,499.28 km) |
| Potomac to Arkadelphia (Arkansas) | 942.05 mi (1,516.08 km) |
| Potomac to Arkansas City (Kansas) | 1,085.91 mi (1,747.60 km) |
| Potomac to Arlington (Tennessee) | 733.63 mi (1,180.67 km) |
| Potomac to Arlington (Texas) | 1,195.17 mi (1,923.44 km) |
| Potomac to Arlington (Virginia) | 10.62 mi (17.09 km) |
| Potomac to Arlington (Washington) | 2,300.83 mi (3,702.83 km) |
| Potomac to Arlington Heights (Illinois) | 604.50 mi (972.85 km) |
| Potomac to Arnold (Maryland) | 37.46 mi (60.29 km) |
| Potomac to Arnold (Missouri) | 710.95 mi (1,144.17 km) |
