| Potomac to Amelia | 4,460.59 mi (7,178.62 km) |
| Potomac to Anagni | 4,521.89 mi (7,277.28 km) |
| Potomac to Ancona | 4,470.69 mi (7,194.88 km) |
| Potomac to Andria | 4,678.85 mi (7,529.88 km) |
| Potomac to Angri | 4,620.83 mi (7,436.51 km) |
| Potomac to Anguillara Sabazia | 4,470.46 mi (7,194.51 km) |
| Potomac to Anzio | 4,509.05 mi (7,256.62 km) |
| Potomac to Anzola dell'Emilia | 4,338.79 mi (6,982.60 km) |
| Potomac to Aosta | 4,133.38 mi (6,652.04 km) |
| Potomac to Apricena | 4,620.57 mi (7,436.09 km) |
| Potomac to Aprilia | 4,505.15 mi (7,250.34 km) |
| Potomac to Aradeo | 4,800.30 mi (7,725.34 km) |
| Potomac to Aragona | 4,702.59 mi (7,568.08 km) |
| Potomac to Arco | 4,279.94 mi (6,887.89 km) |
| Potomac to Arcola | 4,297.12 mi (6,915.55 km) |
