| Potomac to Arcore | 4,222.48 mi (6,795.42 km) |
| Potomac to Ardea | 4,499.53 mi (7,241.30 km) |
| Potomac to Arenzano | 4,234.58 mi (6,814.90 km) |
| Potomac to Arese | 4,214.43 mi (6,782.47 km) |
| Potomac to Arezzo | 4,405.26 mi (7,089.57 km) |
| Potomac to Argelato | 4,344.40 mi (6,991.63 km) |
| Potomac to Argenta | 4,363.85 mi (7,022.94 km) |
| Potomac to Ariano Irpino | 4,628.29 mi (7,448.51 km) |
| Potomac to Ariccia | 4,501.12 mi (7,243.86 km) |
| Potomac to Arluno | 4,210.30 mi (6,775.83 km) |
| Potomac to Arona | 4,186.13 mi (6,736.92 km) |
| Potomac to Artena | 4,511.56 mi (7,260.66 km) |
| Potomac to Arzachena | 4,376.57 mi (7,043.42 km) |
| Potomac to Arzano | 4,600.80 mi (7,404.28 km) |
| Potomac to Arzignano | 4,312.22 mi (6,939.85 km) |
