| Potomac to Isny im Allgau | 4,187.58 mi (6,739.26 km) |
| Potomac to Isselburg | 3,922.70 mi (6,312.97 km) |
| Potomac to Issum | 3,928.83 mi (6,322.85 km) |
| Potomac to Itzehoe | 3,983.40 mi (6,410.67 km) |
| Potomac to Jena | 4,149.52 mi (6,678.00 km) |
| Potomac to Jever | 3,932.03 mi (6,327.99 km) |
| Potomac to Jork | 4,000.36 mi (6,437.96 km) |
| Potomac to Juchen | 3,943.72 mi (6,346.80 km) |
| Potomac to Julich | 3,942.83 mi (6,345.37 km) |
| Potomac to Juterbog | 4,173.94 mi (6,717.31 km) |
| Potomac to Kaarst | 3,945.17 mi (6,349.14 km) |
| Potomac to Kaiserslautern | 4,041.29 mi (6,503.83 km) |
| Potomac to Kalkar | 3,918.32 mi (6,305.93 km) |
| Potomac to Kall | 3,960.68 mi (6,374.09 km) |
| Potomac to Kaltenkirchen | 4,002.33 mi (6,441.13 km) |
