| Frankfort to Isny im Allgau | 4,537.16 mi (7,301.86 km) |
| Frankfort to Isselburg | 4,259.68 mi (6,855.30 km) |
| Frankfort to Issum | 4,267.21 mi (6,867.41 km) |
| Frankfort to Itzehoe | 4,306.52 mi (6,930.68 km) |
| Frankfort to Jena | 4,483.43 mi (7,215.39 km) |
| Frankfort to Jever | 4,258.99 mi (6,854.18 km) |
| Frankfort to Jork | 4,325.13 mi (6,960.62 km) |
| Frankfort to Juchen | 4,283.96 mi (6,894.36 km) |
| Frankfort to Julich | 4,284.05 mi (6,894.51 km) |
| Frankfort to Juterbog | 4,500.92 mi (7,243.54 km) |
| Frankfort to Kaarst | 4,284.75 mi (6,895.63 km) |
| Frankfort to Kaiserslautern | 4,386.98 mi (7,060.16 km) |
| Frankfort to Kalkar | 4,255.96 mi (6,849.31 km) |
| Frankfort to Kall | 4,303.29 mi (6,925.47 km) |
| Frankfort to Kaltenkirchen | 4,325.25 mi (6,960.83 km) |
