| Potomac to Yverdon-les-Bains | 4,072.64 mi (6,554.28 km) |
| Potomac to Zofingen | 4,112.23 mi (6,617.99 km) |
| Potomac to Zollikon | 4,137.54 mi (6,658.72 km) |
| Potomac to Zuchwil | 4,098.83 mi (6,596.42 km) |
| Potomac to Zug | 4,140.31 mi (6,663.18 km) |
| Potomac to Zurich | 4,134.99 mi (6,654.62 km) |
| Potomac to Ra's al `Ayn | 5,850.87 mi (9,416.06 km) |
| Potomac to Tall Abyad | 5,815.44 mi (9,359.05 km) |
| Potomac to Acarlar | 5,309.03 mi (8,544.05 km) |
| Potomac to Acigol | 5,552.08 mi (8,935.20 km) |
| Potomac to Acipayam | 5,393.70 mi (8,680.32 km) |
| Potomac to Adakli | 5,747.71 mi (9,250.04 km) |
| Potomac to Adana | 5,657.44 mi (9,104.78 km) |
| Potomac to Adilcevaz | 5,852.49 mi (9,418.68 km) |
| Potomac to Adiyaman | 5,736.82 mi (9,232.51 km) |
