| Gretna to Isny im Allgau | 5,150.35 mi (8,288.68 km) |
| Gretna to Isselburg | 4,881.89 mi (7,856.64 km) |
| Gretna to Issum | 4,888.52 mi (7,867.31 km) |
| Gretna to Itzehoe | 4,936.49 mi (7,944.52 km) |
| Gretna to Jena | 5,107.68 mi (8,220.01 km) |
| Gretna to Jever | 4,887.00 mi (7,864.86 km) |
| Gretna to Jork | 4,954.30 mi (7,973.18 km) |
| Gretna to Juchen | 4,904.03 mi (7,892.27 km) |
| Gretna to Julich | 4,903.44 mi (7,891.33 km) |
| Gretna to Juterbog | 5,129.09 mi (8,254.47 km) |
| Gretna to Kaarst | 4,905.27 mi (7,894.26 km) |
| Gretna to Kaiserslautern | 5,003.18 mi (8,051.84 km) |
| Gretna to Kalkar | 4,877.74 mi (7,849.97 km) |
| Gretna to Kall | 4,921.72 mi (7,920.74 km) |
| Gretna to Kaltenkirchen | 4,955.34 mi (7,974.84 km) |
