| Frederick to Isny im Allgau | 4,178.25 mi (6,724.24 km) |
| Frederick to Isselburg | 3,911.69 mi (6,295.25 km) |
| Frederick to Issum | 3,918.00 mi (6,305.40 km) |
| Frederick to Itzehoe | 3,970.80 mi (6,390.38 km) |
| Frederick to Jena | 4,138.20 mi (6,659.79 km) |
| Frederick to Jever | 3,919.84 mi (6,308.38 km) |
| Frederick to Jork | 3,987.95 mi (6,417.98 km) |
| Frederick to Juchen | 3,933.11 mi (6,329.73 km) |
| Frederick to Julich | 3,932.35 mi (6,328.50 km) |
| Frederick to Juterbog | 4,161.83 mi (6,697.81 km) |
| Frederick to Kaarst | 3,934.49 mi (6,331.94 km) |
| Frederick to Kaiserslautern | 4,031.41 mi (6,487.92 km) |
| Frederick to Kalkar | 3,907.39 mi (6,288.34 km) |
| Frederick to Kall | 3,950.38 mi (6,357.52 km) |
| Frederick to Kaltenkirchen | 3,989.71 mi (6,420.82 km) |
