| Potomac to Ashtabula (Ohio) | 274.06 mi (441.05 km) |
| Potomac to Ashwaubenon (Wisconsin) | 675.86 mi (1,087.69 km) |
| Potomac to Aspen Hill (Maryland) | 8.09 mi (13.02 km) |
| Potomac to Astoria (Oregon) | 2,386.16 mi (3,840.15 km) |
| Potomac to Atascadero (California) | 2,381.73 mi (3,833.02 km) |
| Potomac to Atascocita (Texas) | 1,196.87 mi (1,926.17 km) |
| Potomac to Atchison (Kansas) | 958.65 mi (1,542.79 km) |
| Potomac to Athens (Alabama) | 612.68 mi (986.02 km) |
| Potomac to Athens (Georgia) | 489.70 mi (788.10 km) |
| Potomac to Athens (Ohio) | 263.56 mi (424.17 km) |
| Potomac to Athens (Tennessee) | 475.73 mi (765.62 km) |
| Potomac to Athens (Texas) | 1,144.95 mi (1,842.63 km) |
| Potomac to Atlanta (Georgia) | 541.19 mi (870.96 km) |
| Potomac to Atlantic Beach (Florida) | 645.42 mi (1,038.71 km) |
| Potomac to Atlantic City (New Jersey) | 148.95 mi (239.72 km) |
