| Potomac to Allison Park (Pennsylvania) | 182.09 mi (293.05 km) |
| Potomac to Allouez (Wisconsin) | 672.92 mi (1,082.95 km) |
| Potomac to Aloha (Oregon) | 2,345.92 mi (3,775.39 km) |
| Potomac to Alpena (Michigan) | 526.92 mi (847.99 km) |
| Potomac to Alpharetta (Georgia) | 520.38 mi (837.46 km) |
| Potomac to Alpine (California) | 2,236.17 mi (3,598.76 km) |
| Potomac to Alpine (Utah) | 1,828.13 mi (2,942.09 km) |
| Potomac to Alsip (Illinois) | 584.27 mi (940.30 km) |
| Potomac to Altadena (California) | 2,275.83 mi (3,662.59 km) |
| Potomac to Altamont (Oregon) | 2,319.66 mi (3,733.13 km) |
| Potomac to Altamonte Springs (Florida) | 754.58 mi (1,214.38 km) |
| Potomac to Alton (Illinois) | 695.63 mi (1,119.51 km) |
| Potomac to Alton (Texas) | 1,504.36 mi (2,421.04 km) |
| Potomac to Altoona (Iowa) | 875.37 mi (1,408.77 km) |
| Potomac to Altoona (Pennsylvania) | 121.50 mi (195.53 km) |
