| Potomac to Argentona | 4,041.59 mi (6,504.32 km) |
| Potomac to Arico el Nuevo | 3,507.22 mi (5,644.33 km) |
| Potomac to Armilla | 3,888.01 mi (6,257.15 km) |
| Potomac to Arnedo | 3,812.51 mi (6,135.63 km) |
| Potomac to Arona | 3,500.50 mi (5,633.52 km) |
| Potomac to Arrecife | 3,637.98 mi (5,854.76 km) |
| Potomac to Arrigorriaga | 3,748.73 mi (6,033.00 km) |
| Potomac to Arroyomolinos | 3,782.06 mi (6,086.64 km) |
| Potomac to Arteijo | 3,482.85 mi (5,605.11 km) |
| Potomac to Arucas | 3,561.53 mi (5,731.73 km) |
| Potomac to Aspe | 3,990.30 mi (6,421.77 km) |
| Potomac to Astorga | 3,619.49 mi (5,825.00 km) |
| Potomac to Atarfe | 3,882.17 mi (6,247.74 km) |
| Potomac to Avila | 3,733.67 mi (6,008.77 km) |
| Potomac to Aviles | 3,599.00 mi (5,792.03 km) |
