| Potomac to Amersham | 3,643.16 mi (5,863.10 km) |
| Potomac to Amesbury | 3,605.73 mi (5,802.86 km) |
| Potomac to Ammanford | 3,502.04 mi (5,635.99 km) |
| Potomac to Ampthill | 3,640.20 mi (5,858.34 km) |
| Potomac to Andover | 3,617.35 mi (5,821.56 km) |
| Potomac to Annan | 3,474.26 mi (5,591.28 km) |
| Potomac to Antrim | 3,364.46 mi (5,414.57 km) |
| Potomac to Appleton | 3,531.33 mi (5,683.13 km) |
| Potomac to Appley Bridge | 3,520.09 mi (5,665.04 km) |
| Potomac to Arbroath | 3,474.45 mi (5,591.59 km) |
| Potomac to Ardrossan | 3,404.80 mi (5,479.50 km) |
| Potomac to Armadale | 3,442.89 mi (5,540.80 km) |
| Potomac to Armthorpe | 3,586.77 mi (5,772.34 km) |
| Potomac to Arnold | 3,594.36 mi (5,784.56 km) |
| Potomac to Ascot | 3,646.23 mi (5,868.03 km) |
