| Hertford to Isny im Allgau | 532.64 mi (857.20 km) |
| Hertford to Isselburg | 279.44 mi (449.72 km) |
| Hertford to Issum | 279.06 mi (449.11 km) |
| Hertford to Itzehoe | 425.96 mi (685.51 km) |
| Hertford to Jena | 506.20 mi (814.65 km) |
| Hertford to Jever | 355.78 mi (572.57 km) |
| Hertford to Jork | 425.80 mi (685.27 km) |
| Hertford to Juchen | 287.24 mi (462.27 km) |
| Hertford to Julich | 284.06 mi (457.15 km) |
| Hertford to Juterbog | 560.10 mi (901.39 km) |
| Hertford to Kaarst | 290.55 mi (467.60 km) |
| Hertford to Kaiserslautern | 380.14 mi (611.78 km) |
| Hertford to Kalkar | 272.31 mi (438.24 km) |
| Hertford to Kall | 299.61 mi (482.17 km) |
| Hertford to Kaltenkirchen | 441.82 mi (711.04 km) |
